Jessica Thomas and Michael Thoennessen
Phys. Rev. Materials 6, 100001 (2022) - Published 11 October, 2022
Zheng Jie Tan, Vrindaa Somjit, Cigdem Toparli, Bilge Yildiz, and Nicholas Fang
Phys. Rev. Materials 6, 105002 (2022) - Published 19 October, 2022
Resistive switching random access memories (RRAMs) promise to overcome the limitation of time- and energy-consumption set by increased training demand in the deep neural network. These devices enable the colocation of memory and processing by storing and utilizing information in the form of conductive networks, such as those made of oxygen vacancies. However, the inherent stochastic nature of atomic motion results in poor reliability and high switching variability in these devices, hindering their widespread use. In this paper, the authors propose a method to substantially reduce the switching variability of RRAM devices by doping the RRAM oxide electrolyte with electronegative metals. They find that electronegative metals reduce the oxygen vacancy formation energy, thereby pinning the conductive filament formation along fixed, predictable paths. This improved reliability enables multibit switching and can facilitate integration into large-scale hardware neural networks.
N. Yamashita, E. Shigematsu, S. Honda, R. Ohshima, M. Shiraishi, and Y. Ando
Phys. Rev. Materials 6, 104405 (2022) - Published 12 October, 2022
Researchers demonstrate room-temperature spin transfer across an interface between an iron-based ferromagnet and a semiconductor, opening a route to creating novel spintronic devices.
Katarzyna Berent, Julyan H. E. Cartwright, Antonio G. Checa, Carlos Pimentel, Paula Ramos-Silva, and C. Ignacio Sainz-Díaz
Phys. Rev. Materials 6, 105601 (2022) - Published 17 October, 2022
The shells of some mollusk species have compact helical structures that researchers propose develop from the self-assembly of a liquid-crystalline material.
Widitha S. Samarakoon, Peter V. Sushko, Dooyong Lee, Bharat Jalan, Hua Zhou, Yingge Du, Zhenxing Feng, and Scott A. Chambers
Phys. Rev. Materials 6, 103405 (2022) - Published 19 October, 2022
Modern thin-film synthesis enables the fabrication of heterostructures in which individual phases can consist of as little as one unit cell. In this extreme thin-film limit, point defects can have a measurable effect on the electronic properties. Such is the case for SrTiO/1 u.c. NdTiO/SrTiO(001). Assuming perfect materials and interfaces, 0.5 electrons should drift from the NTO to each STO layer to compensate the interface dipoles that form. However, the actual carrier density is half this value. This paper shows that transient electron scavengers create an electrostatic potential drop that drives defect formation and lowers the carrier density.
Takashi Kikkawa, Koichi Oyanagi, Tomosato Hioki, Masahiko Ishida, Zhiyong Qiu, Rafael Ramos, Yusuke Hashimoto, and Eiji Saitoh
Phys. Rev. Materials 6, 104402 (2022) - Published 6 October, 2022
Resonant enhancement of spin Seebeck effect (SSE) due to hybridized magnon-phonon excitation (magnon polarons) was recently observed in YFeO (YIG). The effect appears at high magnetic fields when the phonon dispersions are tangential to the magnon dispersion curve. Here, the authors show that the resonance field can be shifted by ~ 2 Tesla to the lower-field side by the Bi substitution in YIG. The result is attributed to the change in the phonon dispersions by the Bi doping. The authors also observe in BiYFeO an enhancement 500% greater than the background magnonic SSE signal at the low temperature of 3 K. Moreover, anisotropic magnon-polaron transport was found through the longitudinal and nonlocal SSE measurements, which provides a clue to further unraveling the physics of magnon-polaron SSEs.
Yoshiki J. Sato, Hikari Manako, Yoshiya Homma, Dexin Li, Ryuji Okazaki, and Dai Aoki
Phys. Rev. Materials 6, 104412 (2022) - Published 24 October, 2022
Chirality, a fundamental property of symmetry, can produce unique magnetic and electronic properties in materials. The discovery of new magnetic compounds with “chirality” leads to the exploration of exotic physical phenomena in chiral crystals. Here, the authors report the discovery and single-crystal growth of a novel Gd-based magnetic compound GdPtB with a chiral crystal structure. GdPtB exhibits a magnetic transition at 87 K and shows magnetic properties arising from the competition between ferromagnetic and Dzyaloshinskii-Moriya interactions. These results pave the way for demonstrating novel spin textures, topological electronic states, and exotic transport phenomena in the novel rare-earth-based chiral crystal.
Weiwei Gao, Jijun Zhao, and James R. Chelikowsky
Phys. Rev. Materials 6, L101402 (2022) - Published 19 October, 2022
Intrinsic low-dimensional multiferroic materials are rare, but they have been pursued for years as promising platforms for exploring the coupling between ferroic orders and hosting novel quantum phenomena. Using first-principles density functional theory calculations, the authors show CrPSe, an experimentally synthesized van der Waals layered material, demonstrates several dynamically stable multiferroic phases, including anti-ferroelectric and ferroelectric phases, which show ferromagnetism and compete with the experimental paraelectric phase. These multiferroic phases have non-negligible Dzyaloshinskii-Moriya interactions that may support chiral spin textures. The small energy barriers and energy differences between phases can be effectively tuned under moderate strain or electric fields.
Cameron McElfresh, Nicolas Bertin, Sylvie Aubry, and Jaime Marian
Phys. Rev. Materials 6, L100601 (2022) - Published 5 October, 2022
Zeng-Yu Yang and Lan-Hong Dai
Phys. Rev. Materials 6, L100602 (2022) - Published 26 October, 2022
Sebastián Echeverri Restrepo, Predrag Andric, and Anthony T. Paxton
Phys. Rev. Materials 6, L100801 (2022) - Published 13 October, 2022
Andrei I. Nikitchenko and Nikolay A. Pertsev
Phys. Rev. Materials 6, L101401 (2022) - Published 5 October, 2022
Weiwei Gao, Jijun Zhao, and James R. Chelikowsky
Phys. Rev. Materials 6, L101402 (2022) - Published 19 October, 2022
Intrinsic low-dimensional multiferroic materials are rare, but they have been pursued for years as promising platforms for exploring the coupling between ferroic orders and hosting novel quantum phenomena. Using first-principles density functional theory calculations, the authors show CrPSe, an experimentally synthesized van der Waals layered material, demonstrates several dynamically stable multiferroic phases, including anti-ferroelectric and ferroelectric phases, which show ferromagnetism and compete with the experimental paraelectric phase. These multiferroic phases have non-negligible Dzyaloshinskii-Moriya interactions that may support chiral spin textures. The small energy barriers and energy differences between phases can be effectively tuned under moderate strain or electric fields.
Cuiying Pei (裴翠颖), Ming Xi (席明), Qi Wang (王琦), Wujun Shi (史武军), Juefei Wu (吴珏霏), Lingling Gao (高玲玲), Yi Zhao (赵毅), Shangjie Tian (田尚杰), Weizheng Cao (曹渭征), Changhua Li (李昌华), Mingxin Zhang (张明鑫), Shihao Zhu (朱世豪), Yulin Chen (陈宇林), Hechang Lei (雷和畅), and Yanpeng Qi (齐彦鹏)
Phys. Rev. Materials 6, L101801 (2022) - Published 24 October, 2022
Jimin Kim, Hoon Kim, Hyun-Woo J. Kim, Sunwook Park, Jin-Kwang Kim, Junyoung Kwon, Jungho Kim, Hyeong Woo Seo, Jun Sung Kim, and B. J. Kim
Phys. Rev. Materials 6, 103401 (2022) - Published 12 October, 2022
Dan Liu, Lin Han, Ran Wei, Shixin Song, Jie Guan, Shuai Dong, and David Tománek
Phys. Rev. Materials 6, 103403 (2022) - Published 14 October, 2022
Martin Minar and Nele Moelans
Phys. Rev. Materials 6, 103404 (2022) - Published 18 October, 2022
Widitha S. Samarakoon, Peter V. Sushko, Dooyong Lee, Bharat Jalan, Hua Zhou, Yingge Du, Zhenxing Feng, and Scott A. Chambers
Phys. Rev. Materials 6, 103405 (2022) - Published 19 October, 2022
Modern thin-film synthesis enables the fabrication of heterostructures in which individual phases can consist of as little as one unit cell. In this extreme thin-film limit, point defects can have a measurable effect on the electronic properties. Such is the case for SrTiO/1 u.c. NdTiO/SrTiO(001). Assuming perfect materials and interfaces, 0.5 electrons should drift from the NTO to each STO layer to compensate the interface dipoles that form. However, the actual carrier density is half this value. This paper shows that transient electron scavengers create an electrostatic potential drop that drives defect formation and lowers the carrier density.
Deep Choudhuri, Bhaskar S. Majumdar, and Hunter Wilkinson
Phys. Rev. Materials 6, 103406 (2022) - Published 25 October, 2022
Rebecca Nicholls, Chris Bell, Ross Springell, Gerard H. Lander, and Johann Bouchet
Phys. Rev. Materials 6, 103407 (2022) - Published 28 October, 2022
Tero Mäkinen, Agata Zaborowska, Małgorzata Frelek-Kozak, Iwona Jóźwik, Łukasz Kurpaska, Stefanos Papanikolaou, and Mikko J. Alava
Phys. Rev. Materials 6, 103601 (2022) - Published 10 October, 2022
Franco Moitzi, Lorenz Romaner, Andrei V. Ruban, and Oleg E. Peil
Phys. Rev. Materials 6, 103602 (2022) - Published 24 October, 2022
Anas Abu-Odeh, Tarun Allaparti, and Mark Asta
Phys. Rev. Materials 6, 103603 (2022) - Published 31 October, 2022
Daniele Lanzoni, Marco Albani, Roberto Bergamaschini, and Francesco Montalenti
Phys. Rev. Materials 6, 103801 (2022) - Published 3 October, 2022
Fulun Wu, Feng Zheng, Weibo He, Xinrui Cao, Tie-Yu Lü, Zi-Zhong Zhu, and Shunqing Wu
Phys. Rev. Materials 6, 103802 (2022) - Published 28 October, 2022
Hao Dong (董昊), Jinfeng Zhao (赵金峰), Huan Yang (杨欢), and Yujun Zheng (郑雨军)
Phys. Rev. Materials 6, 104001 (2022) - Published 10 October, 2022
Megan Cowie, Rikke Plougmann, Zeno Schumacher, and Peter Grütter
Phys. Rev. Materials 6, 104002 (2022) - Published 11 October, 2022
Zhiyuan Wen, Zheng Liu, Jing Zhu, and Shunhong Zhang
Phys. Rev. Materials 6, 104003 (2022) - Published 18 October, 2022
Mahsa Seyedmohammadzadeh, Cem Sevik, and Oğuz Gülseren
Phys. Rev. Materials 6, 104004 (2022) - Published 24 October, 2022
Qing-Yuan Chen, Fei-Jie Huang, Ju-Qi Ruan, Tai Ma, Kai Xiong, and Yao He
Phys. Rev. Materials 6, 104005 (2022) - Published 28 October, 2022
Ying Li and Gang Xu
Phys. Rev. Materials 6, 104201 (2022) - Published 10 October, 2022
Ganesh Pokharel, Brenden Ortiz, Juan Chamorro, Paul Sarte, Linus Kautzsch, Guang Wu, Jacob Ruff, and Stephen D. Wilson
Phys. Rev. Materials 6, 104202 (2022) - Published 13 October, 2022
Chien-Wen Chuang, Seigo Souma, Ayumi Moriya, Kosuke Nakayama, Atsutoshi Ikeda, Mayo Kawaguchi, Keito Obata, Shanta Ranjan Saha, Hidemitsu Takahashi, Shunsaku Kitagawa, Kenji Ishida, Kiyohisa Tanaka, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Takashi Takahashi, Shingo Yonezawa, Johnpierre Paglione, Yoshiteru Maeno, and Takafumi Sato
Phys. Rev. Materials 6, 104203 (2022) - Published 24 October, 2022
Hengxin Tan, Daniel Kaplan, and Binghai Yan
Phys. Rev. Materials 6, 104204 (2022) - Published 27 October, 2022
S. Kundu, A. Pal, Amit Chauhan, K. Patro, K. Anand, S. Rana, V. G. Sathe, Amish G. Joshi, P. Pal, K. Sethupathi, B. R. K. Nanda, and P. Khuntia
Phys. Rev. Materials 6, 104401 (2022) - Published 5 October, 2022
Takashi Kikkawa, Koichi Oyanagi, Tomosato Hioki, Masahiko Ishida, Zhiyong Qiu, Rafael Ramos, Yusuke Hashimoto, and Eiji Saitoh
Phys. Rev. Materials 6, 104402 (2022) - Published 6 October, 2022
Resonant enhancement of spin Seebeck effect (SSE) due to hybridized magnon-phonon excitation (magnon polarons) was recently observed in YFeO (YIG). The effect appears at high magnetic fields when the phonon dispersions are tangential to the magnon dispersion curve. Here, the authors show that the resonance field can be shifted by ~ 2 Tesla to the lower-field side by the Bi substitution in YIG. The result is attributed to the change in the phonon dispersions by the Bi doping. The authors also observe in BiYFeO an enhancement 500% greater than the background magnonic SSE signal at the low temperature of 3 K. Moreover, anisotropic magnon-polaron transport was found through the longitudinal and nonlocal SSE measurements, which provides a clue to further unraveling the physics of magnon-polaron SSEs.
Brianna R. Billingsley, Madalynn Marshall, Zhixue Shu, Huibo Cao, and Tai Kong
Phys. Rev. Materials 6, 104403 (2022) - Published 7 October, 2022
Wencong Sun, Ning Ding, Jun Chen, Hai-Peng You, Jin Peng, Shan-Shan Wang, and Shuai Dong
Phys. Rev. Materials 6, 104404 (2022) - Published 10 October, 2022
N. Yamashita, E. Shigematsu, S. Honda, R. Ohshima, M. Shiraishi, and Y. Ando
Phys. Rev. Materials 6, 104405 (2022) - Published 12 October, 2022
Researchers demonstrate room-temperature spin transfer across an interface between an iron-based ferromagnet and a semiconductor, opening a route to creating novel spintronic devices.
Hiroshige Onoda, Tomohiro Nozaki, Shingo Tamaru, Takayuki Nozaki, and Shinji Yuasa
Phys. Rev. Materials 6, 104406 (2022) - Published 13 October, 2022
Valeri Petkov, Tadisetti D. Rao, AM Milinda Abeykoon, Jorge R. Galeano-Cabral, and Kaya Wei
Phys. Rev. Materials 6, 104407 (2022) - Published 13 October, 2022
Adam P. Pikul, Maria Szlawska, Xiaxin Ding, Józef Sznajd, Masashi Ohashi, Dorota A. Kowalska, Mathieu Pasturel, and Krzysztof Gofryk
Phys. Rev. Materials 6, 104408 (2022) - Published 14 October, 2022
Sara B. Isbill, Ashley E. Shields, J. L. Niedziela, and Andrew J. Miskowiec
Phys. Rev. Materials 6, 104409 (2022) - Published 19 October, 2022
Kevin Moseni, Richard B. Wilson, and Sinisa Coh
Phys. Rev. Materials 6, 104410 (2022) - Published 21 October, 2022
Arne J. Klomp, Ruben Khachaturyan, Theophilus Wallis, Karsten Albe, and Anna Grünebohm
Phys. Rev. Materials 6, 104411 (2022) - Published 24 October, 2022
Yoshiki J. Sato, Hikari Manako, Yoshiya Homma, Dexin Li, Ryuji Okazaki, and Dai Aoki
Phys. Rev. Materials 6, 104412 (2022) - Published 24 October, 2022
Chirality, a fundamental property of symmetry, can produce unique magnetic and electronic properties in materials. The discovery of new magnetic compounds with “chirality” leads to the exploration of exotic physical phenomena in chiral crystals. Here, the authors report the discovery and single-crystal growth of a novel Gd-based magnetic compound GdPtB with a chiral crystal structure. GdPtB exhibits a magnetic transition at 87 K and shows magnetic properties arising from the competition between ferromagnetic and Dzyaloshinskii-Moriya interactions. These results pave the way for demonstrating novel spin textures, topological electronic states, and exotic transport phenomena in the novel rare-earth-based chiral crystal.
Brenden R. Ortiz, Paul M. Sarte, Alon H. Avidor, and Stephen D. Wilson
Phys. Rev. Materials 6, 104413 (2022) - Published 26 October, 2022
Sai Mu and Chris G. Van de Walle
Phys. Rev. Materials 6, 104601 (2022) - Published 4 October, 2022
Dat Q. Tran, Rosalia D. Carrascon, Motoaki Iwaya, Bo Monemar, Vanya Darakchieva, and Plamen P. Paskov
Phys. Rev. Materials 6, 104602 (2022) - Published 7 October, 2022
Ravi Kashikar, P. S. Ghosh, S. Lisenkov, A. Stroppa, and I. Ponomareva
Phys. Rev. Materials 6, 104603 (2022) - Published 10 October, 2022
S. Rostami, N. Seriani, and R. Gebauer
Phys. Rev. Materials 6, 104604 (2022) - Published 10 October, 2022
Phillip Popp and Walter R. L. Lambrecht
Phys. Rev. Materials 6, 104605 (2022) - Published 11 October, 2022
Guy Ohad, Dahvyd Wing, Stephen E. Gant, Ayala V. Cohen, Jonah B. Haber, Francisca Sagredo, Marina R. Filip, Jeffrey B. Neaton, and Leeor Kronik
Phys. Rev. Materials 6, 104606 (2022) - Published 13 October, 2022
Ryu Yukawa, Susumu Yamamoto, Ren Arita, Yuki Minami, Kohei Yamanoi, Kenichi Ozawa, Kazuyuki Sakamoto, Toshihiko Shimizu, Nobuhiko Sarukura, and Iwao Matsuda
Phys. Rev. Materials 6, 104607 (2022) - Published 21 October, 2022
Hwanhui Yun, Dominique Gautreau, K. Andre Mkhoyan, and Turan Birol
Phys. Rev. Materials 6, 104608 (2022) - Published 21 October, 2022
Klichchupong Dabsamut, Adisak Boonchun, and Walter R. L. Lambrecht
Phys. Rev. Materials 6, 104609 (2022) - Published 28 October, 2022
Xiaoxiao Zhang, Ziyi Liu, Qi Cui, Qi Guo, Ningning Wang, Lifen Shi, Hua Zhang, Weihua Wang, Xiaoli Dong, Jianping Sun, Zhiling Dun, and Jinguang Cheng
Phys. Rev. Materials 6, 105001 (2022) - Published 10 October, 2022
Zheng Jie Tan, Vrindaa Somjit, Cigdem Toparli, Bilge Yildiz, and Nicholas Fang
Phys. Rev. Materials 6, 105002 (2022) - Published 19 October, 2022
Resistive switching random access memories (RRAMs) promise to overcome the limitation of time- and energy-consumption set by increased training demand in the deep neural network. These devices enable the colocation of memory and processing by storing and utilizing information in the form of conductive networks, such as those made of oxygen vacancies. However, the inherent stochastic nature of atomic motion results in poor reliability and high switching variability in these devices, hindering their widespread use. In this paper, the authors propose a method to substantially reduce the switching variability of RRAM devices by doping the RRAM oxide electrolyte with electronegative metals. They find that electronegative metals reduce the oxygen vacancy formation energy, thereby pinning the conductive filament formation along fixed, predictable paths. This improved reliability enables multibit switching and can facilitate integration into large-scale hardware neural networks.
Valentin Ransmayr, Jan M. Tomczak, and Anna Galler
Phys. Rev. Materials 6, 105003 (2022) - Published 28 October, 2022
Nanny Strandqvist, Björn Erik Skovdal, Merlin Pohlit, Henry Stopfel, Lisanne van Dijk, Vassilios Kapaklis, and Björgvin Hjörvarsson
Phys. Rev. Materials 6, 105201 (2022) - Published 31 October, 2022
A. Bocchini, U. Gerstmann, T. Bartley, H.-G. Steinrück, G. Henkel, and W. G. Schmidt
Phys. Rev. Materials 6, 105401 (2022) - Published 31 October, 2022
Katarzyna Berent, Julyan H. E. Cartwright, Antonio G. Checa, Carlos Pimentel, Paula Ramos-Silva, and C. Ignacio Sainz-Díaz
Phys. Rev. Materials 6, 105601 (2022) - Published 17 October, 2022
The shells of some mollusk species have compact helical structures that researchers propose develop from the self-assembly of a liquid-crystalline material.
Henrique Rocha, José D. Gouveia, and José R. B. Gomes
Phys. Rev. Materials 6, 105801 (2022) - Published 14 October, 2022
A. Ghribi, S. Ben Radhia, K. Boujdaria, L. Legrand, T. Barisien, M. Chamarro, and C. Testelin
Phys. Rev. Materials 6, 106001 (2022) - Published 3 October, 2022
Nan Wang and Alain Karma
Phys. Rev. Materials 6, 106002 (2022) - Published 7 October, 2022
