Physical Review Applied - Volume 15 Issue 5

EDITORS' SUGGESTION

Magnetic-Field-Compatible Superconducting Transmon Qubit

A. Kringhøj, T. W. Larsen, O. Erlandsson, W. Uilhoorn, J.G. Kroll, M. Hesselberg, R.P.G. McNeil, P. Krogstrup, L. Casparis, C.M. Marcus, and K.D. Petersson

Phys. Rev. Applied 15, 054001 (2021) - Published 3 May, 2021

Hybrid semiconductor-superconductor systems are an appealing platform for both fundamental studies in condensed matter physics and quantum technologies. The authors demonstrate coherent operation of a hybrid superconducting qubit in magnetic fields as strong as 1 T, with the rich qubit spectrum revealing the underlying Josephson physics of these systems. The results open several avenues for research on $e . g .$ robust Majorana transmon qubits, the probing of Andreev physics, and the coupling of superconducting qubits to spin qubits or spin ensembles.

EDITORS' SUGGESTION

Valley Two-Qubit System in a ${Mo S}_{2}$ -Monolayer Gated Double Quantum dot

J. Pawłowski, M. Bieniek, and T. Woźniak

Phys. Rev. Applied 15, 054025 (2021) - Published 12 May, 2021

This study addresses two hot topics in condensed matter physics: quantum computing and valleytronics. The authors propose a solid-state qubit exploiting the electronic valley degree in a monolayer transition-metal dichalcogenide (TMDC). Simulations show how to obtain single- and two-qubit gates in the valley two-qubit system by electrically controlling the state and the coupling between the two electrons confined in a gated double-quantum-dot structure. Both single- and two-qubit operations are explained, as well as initialization and readout. Thus the team obtains a physical scheme for universal quantum computing based on the valley isospin in gate-defined TMDC double quantum dots.

EDITORS' SUGGESTION

Neutron-Resonance Transmission Analysis with a Compact Deuterium-Tritium Neutron Generator

Ethan A. Klein, Farheen Naqvi, Jacob E. Bickus, Hin Y. Lee, Areg Danagoulian, and Robert J. Goldston

Phys. Rev. Applied 15, 054026 (2021) - Published 13 May, 2021

Neutron-resonance transmission analysis (NRTA) is a powerful technique for materials identification with applications in many fields, but to date it has relied on major kilometer-long user facilities. Here the authors develop a methodology that significantly simplifies the necessary platform, allowing for $t a b l e t o p$ laboratory implementations. Experiments demonstrate that the approach here can identify such elements as silver, indium, tungsten, and uranium. This success could turn NRTA, currently a “niche” technique, into an ubiquitous tool with applicability in $e . g .$ nuclear engineering, archaeology, and arms control.

EDITORS' SUGGESTION

Coupled Charge and Radiation Transport Processes in Thermophotovoltaic and Thermoradiative Cells

William A. Callahan, Dudong Feng, Zhuomin M. Zhang, Eric S. Toberer, Andrew J. Ferguson, and Eric J. Tervo

Phys. Rev. Applied 15, 054035 (2021) - Published 17 May, 2021

Energy converters that recover thermal radiation have the potential for high-efficiency solid-state electricity generation. Modeling of these systems to date has made limiting assumptions that do not fully capture the nuances of charge and radiation interactions. To remedy this, the authors propose a fully coupled iterative model to properly account for photon and charge-carrier dynamics in both near-field and far-field thermophotovoltaic and thermoradiative systems. This approach can be used to better understand and design devices and materials that utilize thermal radiation.

EDITORS' SUGGESTION

Interplay of Voltage Control of Magnetic Anisotropy, Spin-Transfer Torque, and Heat in the Spin-Orbit-Torque Switching of Three-Terminal Magnetic Tunnel Junctions

Viola Krizakova, Eva Grimaldi, Kevin Garello, Giacomo Sala, Sebastien Couet, Gouri Sankar Kar, and Pietro Gambardella

Phys. Rev. Applied 15, 054055 (2021) - Published 25 May, 2021

In magnetic random-access memory, the binary memory state can be written using spin-transfer torque (STT) or spin-orbit torque (SOT), each with its advantages. Major improvements could come from using both torques, but that idea is actually not so simple. The authors study the interplay of several effects during the switching of a nanomagnet, and find that the voltage-controlled reduction of magnetic anisotropy and self-heating can minimize writing latency, whereas STT can speed up magnetization reversal. A compact analytical model separates and predicts the impact of these effects on writing efficiency, and allows optimization of design and operating conditions for combined SOT plus STT writing.

LETTER

Light-Induced Atomic Desorption in Microfabricated Vapor Cells for Demonstrating Quantum Optical Applications

Eliran Talker, Pankaj Arora, Roy Zektzer, Yoel Sebbag, Mark Dikopltsev, and Uriel Levy

Phys. Rev. Applied 15, L051001 (2021) - Published 6 May, 2021

In the quest to employ miniaturized atomic vapor cells for quantum applications, unfortunately such a short optical path is insufficient to obtain a decent signal that can be used to lock a laser. Heating up the cell would work, but at the price of undesired currents and linewidth broadening. Instead, the authors use light-induced atomic desorption (LIAD) to increase the atomic (and optical) density. Using LIAD yields a much larger contrast than does conventional spectroscopy—even at room temperature. Furthermore, eliminating the need for heating allow remote operation, without the need to provide electrical contacts to the device, which can be an important advantage in applications.

LETTER

Bulk Probing of Shock Wave Spatial Distribution in Opaque Solids by Ultrasonic Interaction

M. Ducousso, E. Cuenca, M. Marmonier, L. Videau, F. Coulouvrat, and L. Berthe

Phys. Rev. Applied 15, L051002 (2021) - Published 20 May, 2021

Monitoring shock propagation through the bulk of an opaque solid has a strong impact in the study of both wave physics and warm dense matter, but requires large, high-brilliance x-ray facilities. This Letter demonstrates that such measurement can also be performed using a counterpropagating ultrasonic plane wave: As the shock modulates the medium during propagation, scattering occurs when the two waves collide. The spatial widening of a nanosecond-scale laser-driven shock wave over three round trips in metallic samples is imaged with a tabletop phase-array device. This technique could greatly facilitate the study of shock-wave phenomena.

EDITORS' SUGGESTION

Magnetic-Field-Compatible Superconducting Transmon Qubit

A. Kringhøj, T. W. Larsen, O. Erlandsson, W. Uilhoorn, J.G. Kroll, M. Hesselberg, R.P.G. McNeil, P. Krogstrup, L. Casparis, C.M. Marcus, and K.D. Petersson

Phys. Rev. Applied 15, 054001 (2021) - Published 3 May, 2021

Hybrid semiconductor-superconductor systems are an appealing platform for both fundamental studies in condensed matter physics and quantum technologies. The authors demonstrate coherent operation of a hybrid superconducting qubit in magnetic fields as strong as 1 T, with the rich qubit spectrum revealing the underlying Josephson physics of these systems. The results open several avenues for research on $e . g .$ robust Majorana transmon qubits, the probing of Andreev physics, and the coupling of superconducting qubits to spin qubits or spin ensembles.

Deep-Subwavelength Thermal Switch via Resonant Coupling in Monolayer Hexagonal Boron Nitride

Georgia T. Papadakis, Christopher J. Ciccarino, Lingling Fan, Meir Orenstein, Prineha Narang, and Shanhui Fan

Phys. Rev. Applied 15, 054002 (2021) - Published 3 May, 2021

Solving Multiphysics, Multiparameter, Multimodal Inverse Problems: An Application to NMR Relaxation in Porous Media

Rupeng Li, Igor Shikhov, and Christoph H. Arns

Phys. Rev. Applied 15, 054003 (2021) - Published 3 May, 2021

Unified Framework for Charge-Spin Interconversion in Spin-Orbit Materials

Shehrin Sayed, Seokmin Hong, Xiaoxi Huang, Lucas Caretta, Arnoud S. Everhardt, Ramamoorthy Ramesh, Sayeef Salahuddin, and Supriyo Datta

Phys. Rev. Applied 15, 054004 (2021) - Published 4 May, 2021

Role of the $Cu$ -Deficient Interface in $Cu (In, Ga) {Se}_{2}$ Thin-Film Photovoltaics with Alkali-Metal Doping

Shogo Ishizuka and Paul J. Fons

Phys. Rev. Applied 15, 054005 (2021) - Published 4 May, 2021

Accuracy of Entanglement Detection via Artificial Neural Networks and Human-Designed Entanglement Witnesses

Jan Roik, Karol Bartkiewicz, Antonín Černoch, and Karel Lemr

Phys. Rev. Applied 15, 054006 (2021) - Published 4 May, 2021

Differential Heating of Metal Nanostructures at Radio Frequencies

Nicholas J. Rommelfanger, Zihao Ou, Carl H.C. Keck, and Guosong Hong

Phys. Rev. Applied 15, 054007 (2021) - Published 4 May, 2021

Electron Trapping and Detrapping in an Oxide Two-Dimensional Electron Gas: The Role of Ferroelastic Twin Walls

Shashank Kumar Ojha, Sankalpa Hazra, Prithwijit Mandal, Ranjan Kumar Patel, Shivam Nigam, Siddharth Kumar, and S. Middey

Phys. Rev. Applied 15, 054008 (2021) - Published 5 May, 2021

Giant Third-Order Nonlinear Response of Liquids at Terahertz Frequencies

Anton Tcypkin, Maria Zhukova, Maksim Melnik, Irina Vorontsova, Maksim Kulya, Sergey Putilin, Sergei Kozlov, Saumya Choudhary, and Robert W. Boyd

Phys. Rev. Applied 15, 054009 (2021) - Published 5 May, 2021

Compensation of Shallow Donors by Gallium Vacancies in Monoclinic β- ${Ga}_{2} O_{3}$

Santosh K. Swain, Marc H. Weber, Jani Jesenovec, Muad Saleh, Kelvin G. Lynn, and John S. McCloy

Phys. Rev. Applied 15, 054010 (2021) - Published 5 May, 2021

Lateral Photovoltaic Effect in Silk-Protein-Based Nanocomposite Structure for Physically Transient Position-Sensitive Detectors

Yuhong Cao, Zhuyikang Zhao, Peng Bao, Zhikai Gan, and Hui Wang

Phys. Rev. Applied 15, 054011 (2021) - Published 6 May, 2021

Noise-Assisted Quantum Autoencoder

Chenfeng Cao and Xin Wang

Phys. Rev. Applied 15, 054012 (2021) - Published 6 May, 2021

All-Linear Multistate Magnetic Switching Induced by Electrical Current

Meiyin Yang, Yanru Li, Jun Luo, Yongcheng Deng, Nan Zhang, Xueying Zhang, Shaoxin Li, Yan Cui, Peiyue Yu, Tengzhi Yang, Yu Sheng, Sumei Wang, Jing Xu, Chao Zhao, and Kaiyou Wang

Phys. Rev. Applied 15, 054013 (2021) - Published 6 May, 2021

Thermal Relaxation in Metal Films Limited by Diffuson Lattice Excitations of Amorphous Substrates

Elmira M. Baeva, Nadezhda A. Titova, Louis Veyrat, Benjamin Sacépé, Alexander V. Semenov, Gregory N. Goltsman, Anna I. Kardakova, and Vadim. S. Khrapai

Phys. Rev. Applied 15, 054014 (2021) - Published 7 May, 2021

Long-Range Carrier Diffusion in $(In, Ga) N$ Quantum Wells and Implications from Fundamentals to Devices

Aurelien David

Phys. Rev. Applied 15, 054015 (2021) - Published 10 May, 2021

Electric Directional Steering of Cathodoluminescence From Graphene-Based Hybrid Nanostructures

A. Ciattoni, C. Conti, and A. Marini

Phys. Rev. Applied 15, 054016 (2021) - Published 10 May, 2021

Carbon-nanotube Nanomotor Driven by Graphene Origami

Kun Cai, Sreykeo Sun, Jiao Shi, and Qing-Hua Qin

Phys. Rev. Applied 15, 054017 (2021) - Published 11 May, 2021

Enhanced Spin Injection in Molecularly Functionalized Graphene via Ultrathin Oxide Barriers

J. C. Toscano-Figueroa, N. Natera-Cordero, D. A. Bandurin, C. R. Anderson, V. H. Guarochico-Moreira, I. V. Grigorieva, and I. J. Vera-Marun

Phys. Rev. Applied 15, 054018 (2021) - Published 11 May, 2021

Effect of Grain Size on the Electrocaloric Properties of Polycrystalline Ferroelectrics

Xu Hou, Xinkai Li, Jingtong Zhang, Sankar Parsad Bag, Huiyu Li, and Jie Wang

Phys. Rev. Applied 15, 054019 (2021) - Published 11 May, 2021

Infidelity Induced by Ground-Rydberg Decoherence of the Control Qubit in a Two-Qubit Rydberg-Blockade Gate

Yangyang Liu, Yuan Sun, Zhuo Fu, Peng Xu, Xin Wang, Xiaodong He, Jin Wang, and Mingsheng Zhan

Phys. Rev. Applied 15, 054020 (2021) - Published 11 May, 2021

Strong Coupling of an $Fe$ - $Co$ Alloy with Ultralow Damping to Superconducting Co-planar Waveguide Resonators

I.W. Haygood, M.R. Pufall, E.R.J. Edwards, Justin M. Shaw, and W.H. Rippard

Phys. Rev. Applied 15, 054021 (2021) - Published 11 May, 2021

Bidirectional Elastic Diode with Frequency-Preserved Nonreciprocity

Xin Fang, Jihong Wen, Li Cheng, and Baowen Li

Phys. Rev. Applied 15, 054022 (2021) - Published 12 May, 2021

Electrically Driven Formation and Dynamics of Skyrmionic Solitons in Chiral Nematics

Yuan Shen and Ingo Dierking

Phys. Rev. Applied 15, 054023 (2021) - Published 12 May, 2021

Dependence of Stimulated Brillouin Scattering in Water on Temperature, Pressure, and Attenuation Coefficient

Jiulin Shi, Jin Xu, Yangning Guo, Ningning Luo, Shujing Li, and Xingdao He

Phys. Rev. Applied 15, 054024 (2021) - Published 12 May, 2021

EDITORS' SUGGESTION

Valley Two-Qubit System in a ${Mo S}_{2}$ -Monolayer Gated Double Quantum dot

J. Pawłowski, M. Bieniek, and T. Woźniak

Phys. Rev. Applied 15, 054025 (2021) - Published 12 May, 2021

This study addresses two hot topics in condensed matter physics: quantum computing and valleytronics. The authors propose a solid-state qubit exploiting the electronic valley degree in a monolayer transition-metal dichalcogenide (TMDC). Simulations show how to obtain single- and two-qubit gates in the valley two-qubit system by electrically controlling the state and the coupling between the two electrons confined in a gated double-quantum-dot structure. Both single- and two-qubit operations are explained, as well as initialization and readout. Thus the team obtains a physical scheme for universal quantum computing based on the valley isospin in gate-defined TMDC double quantum dots.

EDITORS' SUGGESTION

Neutron-Resonance Transmission Analysis with a Compact Deuterium-Tritium Neutron Generator

Ethan A. Klein, Farheen Naqvi, Jacob E. Bickus, Hin Y. Lee, Areg Danagoulian, and Robert J. Goldston

Phys. Rev. Applied 15, 054026 (2021) - Published 13 May, 2021

Neutron-resonance transmission analysis (NRTA) is a powerful technique for materials identification with applications in many fields, but to date it has relied on major kilometer-long user facilities. Here the authors develop a methodology that significantly simplifies the necessary platform, allowing for $t a b l e t o p$ laboratory implementations. Experiments demonstrate that the approach here can identify such elements as silver, indium, tungsten, and uranium. This success could turn NRTA, currently a “niche” technique, into an ubiquitous tool with applicability in $e . g .$ nuclear engineering, archaeology, and arms control.

Subwavelength Acoustic Vortex Beams Using Self-Demodulation

Noé Jiménez, Joao Ealo, Rubén D. Muelas-Hurtado, Aroune Duclos, and Vicent Romero-García

Phys. Rev. Applied 15, 054027 (2021) - Published 13 May, 2021

Arbitrary Conformal Transformations of Wave Functions

G. Ruffato, E. Rotunno, L.M.C. Giberti, and V. Grillo

Phys. Rev. Applied 15, 054028 (2021) - Published 13 May, 2021

Optical Modulation via Coupling of Distributed Semiconductor Heterojunctions in a $Si$ -ITO-Based Subwavelength Grating

Swati Rajput, Vishal Kaushik, Prem Babu, Pragya Tiwari, Arvind K. Srivastava, and Mukesh Kumar

Phys. Rev. Applied 15, 054029 (2021) - Published 13 May, 2021

Quantum Statistical Transport Phenomena in Memristive Computing Architectures

Christopher N. Singh, Brian A. Crafton, Mathew P. West, Alex S. Weidenbach, Keith T. Butler, Allan H. MacDonald, Arjit Raychowdury, Eric M. Vogel, W. Alan Doolittle, L.F.J. Piper, and Wei-Cheng Lee

Phys. Rev. Applied 15, 054030 (2021) - Published 14 May, 2021

Magnetic Damping in Polycrystalline Thin-Film $Fe − V$ Alloys

Monika Arora, Erna K. Delczeg-Czirjak, Grant Riley, T.J. Silva, Hans T. Nembach, Olle Eriksson, and Justin M. Shaw

Phys. Rev. Applied 15, 054031 (2021) - Published 14 May, 2021

Wide-Field Dynamic Magnetic Microscopy Using Double-Double Quantum Driving of a Diamond Defect Ensemble

Zeeshawn Kazi, Isaac M. Shelby, Hideyuki Watanabe, Kohei M. Itoh, Vaithiyalingam Shutthanandan, Paul A. Wiggins, and Kai-Mei C. Fu

Phys. Rev. Applied 15, 054032 (2021) - Published 14 May, 2021

Multiband Omnidirectional Ventilated Acoustic Barriers Based on Localized Acoustic Rainbow Trapping

Hong-Wei Wu, Yun-Qiao Yin, Zong-Qiang Sheng, Yang Li, Dong-Xiang Qi, and Ru-Wen Peng

Phys. Rev. Applied 15, 054033 (2021) - Published 14 May, 2021

Scalability of All-Optical Neural Networks Based on Spatial Light Modulators

Ying Zuo, Yujun Zhao, You-Chiuan Chen, Shengwang Du, and Junwei Liu

Phys. Rev. Applied 15, 054034 (2021) - Published 17 May, 2021

EDITORS' SUGGESTION

Coupled Charge and Radiation Transport Processes in Thermophotovoltaic and Thermoradiative Cells

William A. Callahan, Dudong Feng, Zhuomin M. Zhang, Eric S. Toberer, Andrew J. Ferguson, and Eric J. Tervo

Phys. Rev. Applied 15, 054035 (2021) - Published 17 May, 2021

Energy converters that recover thermal radiation have the potential for high-efficiency solid-state electricity generation. Modeling of these systems to date has made limiting assumptions that do not fully capture the nuances of charge and radiation interactions. To remedy this, the authors propose a fully coupled iterative model to properly account for photon and charge-carrier dynamics in both near-field and far-field thermophotovoltaic and thermoradiative systems. This approach can be used to better understand and design devices and materials that utilize thermal radiation.

Tunneling of Transverse Acoustic Waves on a Silicon Chip

Nicolas P. Mauranyapin, Erick Romero, Rachpon Kalra, Glen Harris, Christopher G. Baker, and Warwick P. Bowen

Phys. Rev. Applied 15, 054036 (2021) - Published 17 May, 2021

Guided-Wave-Excited Binary Huygens’ Metasurfaces for Dynamic Radiated-Beam Shaping with Independent Gain and Scan-Angle Control

Minseok Kim and George V. Eleftheriades

Phys. Rev. Applied 15, 054037 (2021) - Published 17 May, 2021

Temperature Dependence of the Anisotropic Magnetoresistance of the Metallic Antiferromagnet ${Fe}_{2} As$

Junyi Wu, Manohar H. Karigerasi, Daniel P. Shoemaker, Virginia O. Lorenz, and David G. Cahill

Phys. Rev. Applied 15, 054038 (2021) - Published 18 May, 2021

Lossless Complex-Valued Optical-Field Control with Compound Metaoptics

Brian O. Raeker and Anthony Grbic

Phys. Rev. Applied 15, 054039 (2021) - Published 18 May, 2021

Role of Multiple-Contact Miscibility in Drainage from a Two-Dimensional Porous Medium

Hanbang Zou, Anja C. Slim, and Adrian Neild

Phys. Rev. Applied 15, 054040 (2021) - Published 18 May, 2021

Particle Trapping in Arbitrary Trajectories Using First-Order Bessel-Like Acoustic Beams

Xuemei Ren, Qinxin Zhou, Zheng Xu, and Xiaojun Liu

Phys. Rev. Applied 15, 054041 (2021) - Published 18 May, 2021

Threshold for a Discrete-Variable Sensor of Quantum Reservoirs

Wei Wu, Zhen Peng, Si-Yuan Bai, and Jun-Hong An

Phys. Rev. Applied 15, 054042 (2021) - Published 19 May, 2021

Static Hybrid Quantum Nodes: Toward Perfect State Transfer on a Photonic Chip

Zhaohua Tian, Pu Zhang, and Xue-Wen Chen

Phys. Rev. Applied 15, 054043 (2021) - Published 19 May, 2021

Nonlinearity-Induced Reciprocity Breaking in a Single Nonmagnetic Taiji Resonator

A. Muñoz de las Heras, R. Franchi, S. Biasi, M. Ghulinyan, L. Pavesi, and I. Carusotto

Phys. Rev. Applied 15, 054044 (2021) - Published 19 May, 2021

Optimization of Doping $Cd Te$ with Group-V Elements: A First-Principles Study

Baoying Dou, Qingde Sun, and Su-Huai Wei

Phys. Rev. Applied 15, 054045 (2021) - Published 20 May, 2021

Experimental Evidence of the Existence of Bound States in the Continuum and Fano Resonances in Solid-Liquid Layered Media

Madiha Amrani, Ilyasse Quotane, Cecile Ghouila-Houri, El Houssaine El Boudouti, Leonid Krutyansky, Bogdan Piwakowski, Philippe Pernod, Abdelkrim Talbi, and Bahram Djafari-Rouhani

Phys. Rev. Applied 15, 054046 (2021) - Published 20 May, 2021

Magnetostatically Induced Easy-Cone Magnetic State Tuning by Perpendicular Magnetic Anisotropy in an Unbiased Spin-Torque Diode

A.G. Buzdakov, P.N. Skirdkov, and K.A. Zvezdin

Phys. Rev. Applied 15, 054047 (2021) - Published 20 May, 2021

Quantum Entropy Model of an Integrated Quantum-Random-Number-Generator Chip

Gaëtan Gras, Anthony Martin, Jeong Woon Choi, and Félix Bussières

Phys. Rev. Applied 15, 054048 (2021) - Published 21 May, 2021

Optimizing the Photothermoelectric Effect in Graphene

Aleandro Antidormi and Aron W. Cummings

Phys. Rev. Applied 15, 054049 (2021) - Published 21 May, 2021

Photonic Heat Rectification in a System of Coupled Qubits

A. Iorio, E. Strambini, G. Haack, M. Campisi, and F. Giazotto

Phys. Rev. Applied 15, 054050 (2021) - Published 21 May, 2021

Slip-Flow Regimes in Nanofluidics: A Universal Superexponential Model

Mohammad Aminpour, Sergio Andres Galindo Torres, Alexander Scheuermann, and Ling Li

Phys. Rev. Applied 15, 054051 (2021) - Published 24 May, 2021

Polarization Transfer to External Nuclear Spins Using Ensembles of Nitrogen-Vacancy Centers

A.J. Healey, L.T. Hall, G.A.L. White, T. Teraji, M.-A. Sani, F. Separovic, J.-P. Tetienne, and L.C.L. Hollenberg

Phys. Rev. Applied 15, 054052 (2021) - Published 24 May, 2021

Frequency Conversion of Lasers in a Dynamic Plasma Grating

H. Peng, C. Riconda, S. Weber, C.T. Zhou, and S.C. Ruan

Phys. Rev. Applied 15, 054053 (2021) - Published 24 May, 2021

Boosting Photonic Quantum Computation with Moderate Nonlinearity

A. Pick, E.S. Matekole, Z. Aqua, G. Guendelman, O. Firstenberg, J.P. Dowling, and B. Dayan

Phys. Rev. Applied 15, 054054 (2021) - Published 24 May, 2021

EDITORS' SUGGESTION

Interplay of Voltage Control of Magnetic Anisotropy, Spin-Transfer Torque, and Heat in the Spin-Orbit-Torque Switching of Three-Terminal Magnetic Tunnel Junctions

Viola Krizakova, Eva Grimaldi, Kevin Garello, Giacomo Sala, Sebastien Couet, Gouri Sankar Kar, and Pietro Gambardella

Phys. Rev. Applied 15, 054055 (2021) - Published 25 May, 2021

In magnetic random-access memory, the binary memory state can be written using spin-transfer torque (STT) or spin-orbit torque (SOT), each with its advantages. Major improvements could come from using both torques, but that idea is actually not so simple. The authors study the interplay of several effects during the switching of a nanomagnet, and find that the voltage-controlled reduction of magnetic anisotropy and self-heating can minimize writing latency, whereas STT can speed up magnetization reversal. A compact analytical model separates and predicts the impact of these effects on writing efficiency, and allows optimization of design and operating conditions for combined SOT plus STT writing.

Volume 15, Issue 5

HIGHLIGHTED ARTICLES

LETTERS

ARTICLES

COMMENTS