Prediction of superstrong τ-boron carbide phase from quantum mechanics
Qi An
Phys. Rev. B 95, 100101(R) (2017) - Published 3 March, 2017
C. Huan, L. Yin, J. S. Xia, D. Candela, B. P. Cowan, and N. S. Sullivan
Phys. Rev. B 95, 104107 (2017) - Published 20 March, 2017
The dynamics of the phase separation of very dilute He-He solid solutions is studied using high-sensitivity low-temperature NMR techniques. This paper compares the results observed at very low concentrations (down to 16 ppm He) with previous results up to 2%. The growth of He nanodroplets after phase separation is analyzed and shown to follow a one-third power-law dependence at long times as expected for Ostwald ripening. The time scale for the dynamics is governed by the relatively fast quantum diffusion in solid helium, allowing the long-term behavior of the ripening process to be explored by experiments lasting a few days rather than several months, as in the case of metallic alloys.
Arkadiusz Kosior and Krzysztof Sacha
Phys. Rev. B 95, 104206 (2017) - Published 27 March, 2017
Localization and transport of a quantum particle in fractal lattices with random-site connectivity and without any diagonal disorder are investigated. It is the random hopping terms that introduce disorder-causing localization of a single-particle wave function. The lattices are generated so that their fractal (Hausdorff and spectral) dimensions are independently controlled. Therefore, it is possible to analyze how different fractal dimensions influence the localization properties, which is the main purpose of this paper.
Edward Parker and Leon Balents
Phys. Rev. B 95, 104411 (2017) - Published 13 March, 2017
Antiferromagnetic spin systems have been extensively studied but still yield surprising new physics, especially on geometrically frustrated lattices and in the quantum regime. Less well studied are ferrimagnets, whose net magnetization is positive but less than that of the fully polarized state. Here, the authors study a frustrated ferrimagnetic spin Hamiltonian on a kagome lattice with both ferromagnetic and antiferromagnetic couplings, inspired by density functional theory analysis of the material CuVO(OH)2HO (volborthite). This model displays a very broad plateau in the magnetization curve at 1/3-full magnetization. We incorporate quantum effects via a semiclassical 1/ expansion and find that they further stabilize the plateau. When the frustrating coupling becomes strong enough to almost destabilize the plateau, we find an instability to bound-magnon “exciton” condensation, which results in an exotic “chiral liquid” phase with relativistic excitations that breaks inversion (but no other) symmetry.
André Kubetzka, Christian Hanneken, Roland Wiesendanger, and Kirsten von Bergmann
Phys. Rev. B 95, 104433 (2017) - Published 27 March, 2017
Skyrmions are topological knots in the magnetization, and they can be stabilized as particle-like states in a ferromagnetic environment. Due to their noncollinear spin texture, the local density of states is modified, and they are thus electronically different from their ferromagnetic surroundings. Exploiting the spatial and energy resolution of scanning tunneling microscopy and spectroscopy this work demonstrates how the local spin configuration within a skyrmion modifies the respective differential conductance. This noncollinear magnetoresistance (NCMR) can reach values of 50% in Pd/Fe/Ir(111) and allows imaging of skyrmions with nonmagnetic probe electrodes. Because of its large signal and the reduced technical requirements, NCMR is expected to be useful for the detection of the magnetic state with planar tunnel junctions in skyrmionic spintronics applications.
R. P. Erickson and D. P. Pappas
Phys. Rev. B 95, 104506 (2017) - Published 6 March, 2017
Traveling-wave parametric amplifiers may be fabricated from superconducting films that exhibit highly nonlinear kinetic inductance. The coplanar waveguide of such a microwave device, extending to a meter or more in length but compacted to reside on a chip of the order of a square centimeter, is engineered with periodic variations in its width. These width variations, or loadings, alter the dispersion characteristics of a nonlinear current propagating along the waveguide, changing its group velocity and modulation behavior. A strong pump and a small signal injected into one end of the waveguide mix parametrically in the presence of the nonlinear kinetic inductance. Engineered dispersion induces the favorable conditions of overall phase matching, leading to generation of idler products as well as signal amplification of wide bandwidth, high dynamic range, and low noise, making the device of particular use in quantum computing and photon detection. The authors present a theoretical framework in which signal gain may be calculated solely from loading design. This involves construction of a metamaterial band theory of the engineered dispersion, which is used as a basis to describe the mixing of nonlinear traveling waves.
Yang-Zhi Chou, Yunxiang Liao, and Matthew S. Foster
Phys. Rev. B 95, 104507 (2017) - Published 8 March, 2017
An exciting recent development is the ability to drive a quantum material into a highly excited, but still phase coherent state, using intense laser sources. Although such a state can be extremely short-lived, it can be long enough for detection using ultrafast spectroscopy. The authors here show how intense laser pulses can generate a new type of nonequilibrium superconducting phase. The authors demonstrate theoretically that the pump induces a “twisted” BCS state that subsequently evolves coherently after the cessation of the pulse. They show how the nonlinear coupling of the pump pulse light can induce coherent dynamics of , consistent with the experiment [R. Matsunaga et al. Phys. Rev. Lett. 111, 057002 (2013)]. Moreover, the authors show that more intense pump pulses can create a far-from-equilibrium phase of gapless superconductivity, originally predicted in the context of ultracold atomic gases. The terahertz pump is found to be much more efficient than the interaction quench at producing this gapless phase. These results open the door to engineering and observing new dynamical phases and phase transitions in quantum materials.
Qi An
Phys. Rev. B 95, 100101(R) (2017) - Published 3 March, 2017
Andrey A. Bagrov, Alessandro Principi, and Mikhail I. Katsnelson
Phys. Rev. B 95, 100201(R) (2017) - Published 14 March, 2017
Tuhin Maity, Demie Kepaptsoglou, Michael Schmidt, Quentin Ramasse, and Saibal Roy
Phys. Rev. B 95, 100401(R) (2017) - Published 3 March, 2017
Julia Wildeboer, Alexander Seidel, and Roger G. Melko
Phys. Rev. B 95, 100402(R) (2017) - Published 6 March, 2017
Shaojie Hu, Xiaomin Cui, Tatsuya Nomura, Tai Min, and Takashi Kimura
Phys. Rev. B 95, 100403(R) (2017) - Published 20 March, 2017
H. Takahashi, T. Akiba, K. Imura, T. Shiino, K. Deguchi, N. K. Sato, H. Sakai, M. S. Bahramy, and S. Ishiwata
Phys. Rev. B 95, 100501(R) (2017) - Published 7 March, 2017
Kyuil Cho, A. Fente, S. Teknowijoyo, M. A. Tanatar, K. R. Joshi, N. M. Nusran, T. Kong, W. R. Meier, U. Kaluarachchi, I. Guillamón, H. Suderow, S. L. Bud'ko, P. C. Canfield, and R. Prozorov
Phys. Rev. B 95, 100502(R) (2017) - Published 8 March, 2017
Eugene M. Chudnovsky
Phys. Rev. B 95, 100503(R) (2017) - Published 13 March, 2017
Mingwei Ma, Lichen Wang, Philippe Bourges, Yvan Sidis, Sergey Danilkin, and Yuan Li
Phys. Rev. B 95, 100504(R) (2017) - Published 17 March, 2017
P. L. Alireza, G. H. Zhang, W. Guo, J. Porras, T. Loew, Y.-T. Hsu, G. G. Lonzarich, M. Le Tacon, B. Keimer, and Suchitra E. Sebastian
Phys. Rev. B 95, 100505(R) (2017) - Published 27 March, 2017
Dahu Chang, Chun-Yao Niu, Xiaowei Huang, Qiang Sun, Jun-Hyung Cho, and Yu Jia
Phys. Rev. B 95, 104101 (2017) - Published 8 March, 2017
B. Sturman and E. Podivilov
Phys. Rev. B 95, 104102 (2017) - Published 10 March, 2017
Xunxiang Hu, Takaaki Koyanagi, Yutai Katoh, and Brian D. Wirth
Phys. Rev. B 95, 104103 (2017) - Published 10 March, 2017
Bin Xu, Vincent Garcia, Stéphane Fusil, Manuel Bibes, and L. Bellaiche
Phys. Rev. B 95, 104104 (2017) - Published 14 March, 2017
Somayeh Faraji, S. Alireza Ghasemi, Samare Rostami, Robabe Rasoulkhani, Bastian Schaefer, Stefan Goedecker, and Maximilian Amsler
Phys. Rev. B 95, 104105 (2017) - Published 16 March, 2017
R. J. Dikken, B. J. Thijsse, and L. Nicola
Phys. Rev. B 95, 104106 (2017) - Published 20 March, 2017
C. Huan, L. Yin, J. S. Xia, D. Candela, B. P. Cowan, and N. S. Sullivan
Phys. Rev. B 95, 104107 (2017) - Published 20 March, 2017
The dynamics of the phase separation of very dilute He-He solid solutions is studied using high-sensitivity low-temperature NMR techniques. This paper compares the results observed at very low concentrations (down to 16 ppm He) with previous results up to 2%. The growth of He nanodroplets after phase separation is analyzed and shown to follow a one-third power-law dependence at long times as expected for Ostwald ripening. The time scale for the dynamics is governed by the relatively fast quantum diffusion in solid helium, allowing the long-term behavior of the ripening process to be explored by experiments lasting a few days rather than several months, as in the case of metallic alloys.
Poulumi Dey, Roman Nazarov, Biswanath Dutta, Mengji Yao, Michael Herbig, Martin Friák, Tilmann Hickel, Dierk Raabe, and Jörg Neugebauer
Phys. Rev. B 95, 104108 (2017) - Published 22 March, 2017
Mark J. Bowick, Andrej Košmrlj, David R. Nelson, and Rastko Sknepnek
Phys. Rev. B 95, 104109 (2017) - Published 22 March, 2017
Guangtao Liu, Stanislav Besedin, Alla Irodova, Hanyu Liu, Guoying Gao, Mikhail Eremets, Xin Wang, and Yanming Ma
Phys. Rev. B 95, 104110 (2017) - Published 24 March, 2017
Junjing Deng, Young Pyo Hong, Si Chen, Youssef S. G. Nashed, Tom Peterka, Anthony J. F. Levi, John Damoulakis, Sayan Saha, Travis Eiles, and Chris Jacobsen
Phys. Rev. B 95, 104111 (2017) - Published 24 March, 2017
Q. Y. Hu, J.-F. Shu, W. G. Yang, C. Park, M. W. Chen, T. Fujita, H.-K. Mao, and H. W. Sheng
Phys. Rev. B 95, 104112 (2017) - Published 31 March, 2017
Asuka Ishikawa, Yoshiki Takagiwa, Kaoru Kimura, and Ryuji Tamura
Phys. Rev. B 95, 104201 (2017) - Published 6 March, 2017
Henriette W. Hansen, Bernhard Frick, Tina Hecksher, Jeppe C. Dyre, and Kristine Niss
Phys. Rev. B 95, 104202 (2017) - Published 10 March, 2017
J. Krausser, A. E. Lagogianni, K. Samwer, and A. Zaccone
Phys. Rev. B 95, 104203 (2017) - Published 14 March, 2017
Trithep Devakul, Satya N. Majumdar, and David A. Huse
Phys. Rev. B 95, 104204 (2017) - Published 20 March, 2017
Raymond Atta-Fynn, David A. Drabold, Stephen R. Elliott, and Parthapratim Biswas
Phys. Rev. B 95, 104205 (2017) - Published 21 March, 2017
Arkadiusz Kosior and Krzysztof Sacha
Phys. Rev. B 95, 104206 (2017) - Published 27 March, 2017
Localization and transport of a quantum particle in fractal lattices with random-site connectivity and without any diagonal disorder are investigated. It is the random hopping terms that introduce disorder-causing localization of a single-particle wave function. The lattices are generated so that their fractal (Hausdorff and spectral) dimensions are independently controlled. Therefore, it is possible to analyze how different fractal dimensions influence the localization properties, which is the main purpose of this paper.
A. V. Nenashev, M. Wiemer, A. V. Dvurechenskii, L. V. Kulik, A. B. Pevtsov, F. Gebhard, M. Koch, and S. D. Baranovskii
Phys. Rev. B 95, 104207 (2017) - Published 28 March, 2017
Mariana M. Odashima and Caio H. Lewenkopf
Phys. Rev. B 95, 104301 (2017) - Published 3 March, 2017
Yosuke Kayanuma and Kazutaka G. Nakamura
Phys. Rev. B 95, 104302 (2017) - Published 8 March, 2017
Boris Dorado, François Bottin, and Johann Bouchet
Phys. Rev. B 95, 104303 (2017) - Published 10 March, 2017
Fabian R. A. Biebl and Stefan Kehrein
Phys. Rev. B 95, 104304 (2017) - Published 17 March, 2017
Mohamed A. K. Othman, Vincenzo Galdi, and Filippo Capolino
Phys. Rev. B 95, 104305 (2017) - Published 17 March, 2017
Bartłomiej Gardas, Jacek Dziarmaga, and Wojciech H. Zurek
Phys. Rev. B 95, 104306 (2017) - Published 24 March, 2017
M. Naji, N. Magnani, L. J. Bonales, S. Mastromarino, J.-Y. Colle, J. Cobos, and D. Manara
Phys. Rev. B 95, 104307 (2017) - Published 29 March, 2017
L. C. Wang, X. P. Li, and C. F. Li
Phys. Rev. B 95, 104308 (2017) - Published 30 March, 2017
Hayat Zaoui, Pier Luca Palla, Fabrizio Cleri, and Evelyne Lampin
Phys. Rev. B 95, 104309 (2017) - Published 31 March, 2017
X. Ma, C. J. Olson Reichhardt, and C. Reichhardt
Phys. Rev. B 95, 104401 (2017) - Published 3 March, 2017
A. Allerdt, A. E. Feiguin, and S. Das Sarma
Phys. Rev. B 95, 104402 (2017) - Published 6 March, 2017
Yan Wen, Jun Wu, Peng Li, Qiang Zhang, Yuelei Zhao, Aurelien Manchon, John Q. Xiao, and Xixiang Zhang
Phys. Rev. B 95, 104403 (2017) - Published 6 March, 2017
K.-W. Kim, L. O'Brien, P. A. Crowell, C. Leighton, and M. D. Stiles
Phys. Rev. B 95, 104404 (2017) - Published 7 March, 2017
Ilia N. Sivkov, Oleg O. Brovko, Ivan Rungger, and Valeri S. Stepanyuk
Phys. Rev. B 95, 104405 (2017) - Published 8 March, 2017
Ricardo Gabriel Elías, Nicolas Vidal-Silva, and Aurélien Manchon
Phys. Rev. B 95, 104406 (2017) - Published 8 March, 2017
M. Cabrera-Baez, A. Naranjo-Uribe, J. M. Osorio-Guillén, C. Rettori, and M. A. Avila
Phys. Rev. B 95, 104407 (2017) - Published 8 March, 2017
Sunil K. Karna, Y. Zhao, R. Sankar, M. Avdeev, P. C. Tseng, C. W. Wang, G. J. Shu, K. Matan, G. Y. Guo, and F. C. Chou
Phys. Rev. B 95, 104408 (2017) - Published 8 March, 2017
Yuen Yiu, Manh Duc Le, Rasmus Toft-Petersen, Georg Ehlers, Robert J. McQueeney, and David Vaknin
Phys. Rev. B 95, 104409 (2017) - Published 9 March, 2017
B. Hebler, P. Reinhardt, G. L. Katona, O. Hellwig, and M. Albrecht
Phys. Rev. B 95, 104410 (2017) - Published 10 March, 2017
Edward Parker and Leon Balents
Phys. Rev. B 95, 104411 (2017) - Published 13 March, 2017
Antiferromagnetic spin systems have been extensively studied but still yield surprising new physics, especially on geometrically frustrated lattices and in the quantum regime. Less well studied are ferrimagnets, whose net magnetization is positive but less than that of the fully polarized state. Here, the authors study a frustrated ferrimagnetic spin Hamiltonian on a kagome lattice with both ferromagnetic and antiferromagnetic couplings, inspired by density functional theory analysis of the material CuVO(OH)2HO (volborthite). This model displays a very broad plateau in the magnetization curve at 1/3-full magnetization. We incorporate quantum effects via a semiclassical 1/ expansion and find that they further stabilize the plateau. When the frustrating coupling becomes strong enough to almost destabilize the plateau, we find an instability to bound-magnon “exciton” condensation, which results in an exotic “chiral liquid” phase with relativistic excitations that breaks inversion (but no other) symmetry.
Saumya Mukherjee, Andreas Dönni, Taro Nakajima, Setsuo Mitsuda, Makoto Tachibana, Hideaki Kitazawa, Vladimir Pomjakushin, Lukas Keller, Christof Niedermayer, Andrea Scaramucci, and Michel Kenzelmann
Phys. Rev. B 95, 104412 (2017) - Published 13 March, 2017
Kazuya Kamazawa, Motoyuki Ishikado, Seiko Ohira-Kawamura, Yukinobu Kawakita, Kazuhisa Kakurai, Kenji Nakajima, and Masatoshi Sato
Phys. Rev. B 95, 104413 (2017) - Published 13 March, 2017
A. Furrer, A. Podlesnyak, E. Pomjakushina, and V. Pomjakushin
Phys. Rev. B 95, 104414 (2017) - Published 14 March, 2017
F. J. T. Goncalves, T. Sogo, Y. Shimamoto, Y. Kousaka, J. Akimitsu, S. Nishihara, K. Inoue, D. Yoshizawa, M. Hagiwara, M. Mito, R. L. Stamps, I. G. Bostrem, Vl. E. Sinitsyn, A. S. Ovchinnikov, J. Kishine, and Y. Togawa
Phys. Rev. B 95, 104415 (2017) - Published 14 March, 2017
Eigo Takagi, Takuya Aoyama, Shigeo Hara, Hirohiko Sato, Tsuyoshi Kimura, and Yusuke Wakabayashi
Phys. Rev. B 95, 104416 (2017) - Published 15 March, 2017
D. M. Burn, M. Chadha, and W. R. Branford
Phys. Rev. B 95, 104417 (2017) - Published 15 March, 2017
F. L. A. Machado, P. R. T. Ribeiro, J. Holanda, R. L. Rodríguez-Suárez, A. Azevedo, and S. M. Rezende
Phys. Rev. B 95, 104418 (2017) - Published 15 March, 2017
Axiel Yaël Birenbaum, Andrea Scaramucci, and Claude Ederer
Phys. Rev. B 95, 104419 (2017) - Published 16 March, 2017
T. Nomura, Y. Kohama, Y. H. Matsuda, K. Kindo, and T. C. Kobayashi
Phys. Rev. B 95, 104420 (2017) - Published 16 March, 2017
Aaron M. Ferona and Robert E. Camley
Phys. Rev. B 95, 104421 (2017) - Published 16 March, 2017
S. A. Morley, D. Alba Venero, J. M. Porro, S. T. Riley, A. Stein, P. Steadman, R. L. Stamps, S. Langridge, and C. H. Marrows
Phys. Rev. B 95, 104422 (2017) - Published 16 March, 2017
Erik D. Schaefer, Stephan Borek, Jürgen Braun, Ján Minár, Hubert Ebert, Katerina Medjanik, Dmytro Kutnyakhov, Gerd Schönhense, and Hans-Joachim Elmers
Phys. Rev. B 95, 104423 (2017) - Published 17 March, 2017
Enric Stern-Taulats, Teresa Castán, Antoni Planes, Laura H. Lewis, Radhika Barua, Sabyasachi Pramanick, Subham Majumdar, and Lluís Mañosa
Phys. Rev. B 95, 104424 (2017) - Published 17 March, 2017
Piotr Graczyk, Jarosław Kłos, and Maciej Krawczyk
Phys. Rev. B 95, 104425 (2017) - Published 20 March, 2017
Tomohiro Taniguchi
Phys. Rev. B 95, 104426 (2017) - Published 20 March, 2017
Liqin Ke, Bruce N. Harmon, and Matthew J. Kramer
Phys. Rev. B 95, 104427 (2017) - Published 20 March, 2017
A. S. Gibbs, A. Yamamoto, A. N. Yaresko, K. S. Knight, H. Yasuoka, M. Majumder, M. Baenitz, P. J. Saines, J. R. Hester, D. Hashizume, A. Kondo, K. Kindo, and H. Takagi
Phys. Rev. B 95, 104428 (2017) - Published 21 March, 2017
Y. Avishai and Y. B. Band
Phys. Rev. B 95, 104429 (2017) - Published 21 March, 2017
Klaus D. Usadel
Phys. Rev. B 95, 104430 (2017) - Published 21 March, 2017
Changle Liu, Anmin Zhang, Qingming Zhang, Rong Yu, and Xiaoqun Wang
Phys. Rev. B 95, 104431 (2017) - Published 22 March, 2017
H. Yu, S. D. Brechet, P. Che, F. A. Vetro, M. Collet, S. Tu, Y. G. Zhang, Y. Zhang, T. Stueckler, L. Wang, H. Cui, D. Wang, C. Zhao, P. Bortolotti, A. Anane, J-Ph. Ansermet, and W. Zhao
Phys. Rev. B 95, 104432 (2017) - Published 23 March, 2017
André Kubetzka, Christian Hanneken, Roland Wiesendanger, and Kirsten von Bergmann
Phys. Rev. B 95, 104433 (2017) - Published 27 March, 2017
Skyrmions are topological knots in the magnetization, and they can be stabilized as particle-like states in a ferromagnetic environment. Due to their noncollinear spin texture, the local density of states is modified, and they are thus electronically different from their ferromagnetic surroundings. Exploiting the spatial and energy resolution of scanning tunneling microscopy and spectroscopy this work demonstrates how the local spin configuration within a skyrmion modifies the respective differential conductance. This noncollinear magnetoresistance (NCMR) can reach values of 50% in Pd/Fe/Ir(111) and allows imaging of skyrmions with nonmagnetic probe electrodes. Because of its large signal and the reduced technical requirements, NCMR is expected to be useful for the detection of the magnetic state with planar tunnel junctions in skyrmionic spintronics applications.
Chong Bi, Hamid Almasi, Kyle Price, Ty Newhouse-Illige, Meng Xu, Shane R. Allen, Xin Fan, and Weigang Wang
Phys. Rev. B 95, 104434 (2017) - Published 28 March, 2017
G. Y. Shi, C. H. Wan, Y. S. Chang, F. Li, X. J. Zhou, P. X. Zhang, J. W. Cai, X. F. Han, F. Pan, and C. Song
Phys. Rev. B 95, 104435 (2017) - Published 28 March, 2017
Andreas Rückriegel and Peter Kopietz
Phys. Rev. B 95, 104436 (2017) - Published 28 March, 2017
Amal al-Wahish, K. R. O'Neal, C. Lee, S. Fan, K. Hughey, M. O. Yokosuk, A. J. Clune, Z. Li, J. A. Schlueter, J. L. Manson, M.-H. Whangbo, and J. L. Musfeldt
Phys. Rev. B 95, 104437 (2017) - Published 28 March, 2017
D. Laroze, P. Díaz, and R. L. Stamps
Phys. Rev. B 95, 104438 (2017) - Published 29 March, 2017
Z. L. Dun, J. Trinh, M. Lee, E. S. Choi, K. Li, Y. F. Hu, Y. X. Wang, N. Blanc, A. P. Ramirez, and H. D. Zhou
Phys. Rev. B 95, 104439 (2017) - Published 30 March, 2017
T. J. Williams, A. A. Aczel, M. B. Stone, M. N. Wilson, and G. M. Luke
Phys. Rev. B 95, 104440 (2017) - Published 31 March, 2017
Tim Böhnert, Roberta Dutra, Rubem L. Sommer, Elvira Paz, Santiago Serrano-Guisan, Ricardo Ferreira, and Paulo P. Freitas
Phys. Rev. B 95, 104441 (2017) - Published 31 March, 2017
O. A. Petrenko, O. Young, D. Brunt, G. Balakrishnan, P. Manuel, D. D. Khalyavin, and C. Ritter
Phys. Rev. B 95, 104442 (2017) - Published 31 March, 2017
A. Meraki, P. T. McColgan, P. M. Rentzepis, R. Z. Li, D. M. Lee, and V. V. Khmelenko
Phys. Rev. B 95, 104502 (2017) - Published 1 March, 2017
Yuta Murotani, Naoto Tsuji, and Hideo Aoki
Phys. Rev. B 95, 104503 (2017) - Published 2 March, 2017
L. Liu, K. Okazaki, T. Yoshida, H. Suzuki, M. Horio, L. C. C. Ambolode, II, J. Xu, S. Ideta, M. Hashimoto, D. H. Lu, Z.-X. Shen, Y. Ota, S. Shin, M. Nakajima, S. Ishida, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Mikami, T. Kakeshita, Y. Yamakawa, H. Kontani, S. Uchida, and A. Fujimori
Phys. Rev. B 95, 104504 (2017) - Published 6 March, 2017
M. Marziali Bermúdez, E. R. Louden, M. R. Eskildsen, C. D. Dewhurst, V. Bekeris, and G. Pasquini
Phys. Rev. B 95, 104505 (2017) - Published 6 March, 2017
R. P. Erickson and D. P. Pappas
Phys. Rev. B 95, 104506 (2017) - Published 6 March, 2017
Traveling-wave parametric amplifiers may be fabricated from superconducting films that exhibit highly nonlinear kinetic inductance. The coplanar waveguide of such a microwave device, extending to a meter or more in length but compacted to reside on a chip of the order of a square centimeter, is engineered with periodic variations in its width. These width variations, or loadings, alter the dispersion characteristics of a nonlinear current propagating along the waveguide, changing its group velocity and modulation behavior. A strong pump and a small signal injected into one end of the waveguide mix parametrically in the presence of the nonlinear kinetic inductance. Engineered dispersion induces the favorable conditions of overall phase matching, leading to generation of idler products as well as signal amplification of wide bandwidth, high dynamic range, and low noise, making the device of particular use in quantum computing and photon detection. The authors present a theoretical framework in which signal gain may be calculated solely from loading design. This involves construction of a metamaterial band theory of the engineered dispersion, which is used as a basis to describe the mixing of nonlinear traveling waves.
Yang-Zhi Chou, Yunxiang Liao, and Matthew S. Foster
Phys. Rev. B 95, 104507 (2017) - Published 8 March, 2017
An exciting recent development is the ability to drive a quantum material into a highly excited, but still phase coherent state, using intense laser sources. Although such a state can be extremely short-lived, it can be long enough for detection using ultrafast spectroscopy. The authors here show how intense laser pulses can generate a new type of nonequilibrium superconducting phase. The authors demonstrate theoretically that the pump induces a “twisted” BCS state that subsequently evolves coherently after the cessation of the pulse. They show how the nonlinear coupling of the pump pulse light can induce coherent dynamics of , consistent with the experiment [R. Matsunaga et al. Phys. Rev. Lett. 111, 057002 (2013)]. Moreover, the authors show that more intense pump pulses can create a far-from-equilibrium phase of gapless superconductivity, originally predicted in the context of ultracold atomic gases. The terahertz pump is found to be much more efficient than the interaction quench at producing this gapless phase. These results open the door to engineering and observing new dynamical phases and phase transitions in quantum materials.
W. Hu, D. Nicoletti, A. V. Boris, B. Keimer, and A. Cavalleri
Phys. Rev. B 95, 104508 (2017) - Published 10 March, 2017
A. Kamlapure, S. Manna, L. Cornils, T. Hänke, M. Bremholm, Ph. Hofmann, J. Wiebe, and R. Wiesendanger
Phys. Rev. B 95, 104509 (2017) - Published 13 March, 2017
X. Montiel, T. Kloss, and C. Pépin
Phys. Rev. B 95, 104510 (2017) - Published 13 March, 2017
Shun Tamura, Shingo Kobayashi, Lu Bo, and Yukio Tanaka
Phys. Rev. B 95, 104511 (2017) - Published 13 March, 2017
Itzik Kapon, David S. Ellis, Gil Drachuck, Galina Bazalitski, Eugen Weschke, Enrico Schierle, Jörg Strempfer, Christof Niedermayer, and Amit Keren
Phys. Rev. B 95, 104512 (2017) - Published 14 March, 2017
Lev Bulaevskii, Ronivon Eneias, and Alvaro Ferraz
Phys. Rev. B 95, 104513 (2017) - Published 20 March, 2017
Yue Sun, Akiyoshi Park, Sunseng Pyon, Tsuyoshi Tamegai, Tadashi Kambara, and Ataru Ichinose
Phys. Rev. B 95, 104514 (2017) - Published 21 March, 2017
M. A. Rahimi, A. G. Moghaddam, C. Dykstra, M. Governale, and U. Zülicke
Phys. Rev. B 95, 104515 (2017) - Published 21 March, 2017
Peng Lv, Ai-Min Guo, Huaiyu Li, Chunxiao Liu, X. C. Xie, and Qing-Feng Sun
Phys. Rev. B 95, 104516 (2017) - Published 22 March, 2017
Abhiram Soori and Subroto Mukerjee
Phys. Rev. B 95, 104517 (2017) - Published 23 March, 2017
Marisa Dusseault and Massimo Boninsegni
Phys. Rev. B 95, 104518 (2017) - Published 23 March, 2017
H. J. Zhao, V. R. Misko, J. Tempere, and F. Nori
Phys. Rev. B 95, 104519 (2017) - Published 28 March, 2017
A. A. Kopasov, D. A. Savinov, and A. S. Mel'nikov
Phys. Rev. B 95, 104520 (2017) - Published 30 March, 2017
Kristofer Björnson, Alexander V. Balatsky, and Annica M. Black-Schaffer
Phys. Rev. B 95, 104521 (2017) - Published 31 March, 2017