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Title: Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures

Abstract

Here, harmonic measurements of the longitudinal and transverse voltages in Bi-Sb/Co bilayers are presented. A large second harmonic voltage signal due to the ordinary Nernst effect is observed. In experiments where a magnetic field is rotated in the film plane, the ordinary Nernst effect shows the same angular dependence in the transverse voltage as the damping-like spin-orbit torque and in the longitudinal voltage as the unidirectional spin-Hall magnetoresistance, respectively. Therefore, the ordinary Nernst effect can be a spurious signal in spin-orbit torque measurements, leading to an overestimation of the spin-Hall angle and spin-Hall conductivity in topological insulators.

Authors:
 [1];  [2];  [3];  [2];  [4];  [2];  [5]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  2. Univ. of Texas, Austin, TX (United States). Microelectronics Research Center and Dept. of Electrical and Computer Engineering
  3. Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences
  4. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Div.
  5. Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Div.
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences & Engineering Division (SC-22.2)
OSTI Identifier:
1526601
Alternate Identifier(s):
OSTI ID: 1510370
Grant/Contract Number:  
AC02-05CH11231; AC02-05-CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Roschewsky, Niklas, Walker, Emily S., Gowtham, Praveen, Muschinske, Sarah, Hellman, Frances, Bank, Seth R., and Salahuddin, Sayeef. Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures. United States: N. p., 2019. Web. doi:10.1103/physrevb.99.195103.
Roschewsky, Niklas, Walker, Emily S., Gowtham, Praveen, Muschinske, Sarah, Hellman, Frances, Bank, Seth R., & Salahuddin, Sayeef. Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures. United States. doi:10.1103/physrevb.99.195103.
Roschewsky, Niklas, Walker, Emily S., Gowtham, Praveen, Muschinske, Sarah, Hellman, Frances, Bank, Seth R., and Salahuddin, Sayeef. Wed . "Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures". United States. doi:10.1103/physrevb.99.195103.
@article{osti_1526601,
title = {Spin-orbit torque and Nernst effect in Bi-Sb/Co heterostructures},
author = {Roschewsky, Niklas and Walker, Emily S. and Gowtham, Praveen and Muschinske, Sarah and Hellman, Frances and Bank, Seth R. and Salahuddin, Sayeef},
abstractNote = {Here, harmonic measurements of the longitudinal and transverse voltages in Bi-Sb/Co bilayers are presented. A large second harmonic voltage signal due to the ordinary Nernst effect is observed. In experiments where a magnetic field is rotated in the film plane, the ordinary Nernst effect shows the same angular dependence in the transverse voltage as the damping-like spin-orbit torque and in the longitudinal voltage as the unidirectional spin-Hall magnetoresistance, respectively. Therefore, the ordinary Nernst effect can be a spurious signal in spin-orbit torque measurements, leading to an overestimation of the spin-Hall angle and spin-Hall conductivity in topological insulators.},
doi = {10.1103/physrevb.99.195103},
journal = {Physical Review B},
number = 19,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}

Journal Article:
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Works referenced in this record:

Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum
journal, May 2012


Unidirectional spin-Hall and Rashba−Edelstein magnetoresistance in topological insulator-ferromagnet layer heterostructures
journal, January 2018


Magnetization switching through giant spin–orbit torque in a magnetically doped topological insulator heterostructure
journal, April 2014

  • Fan, Yabin; Upadhyaya, Pramey; Kou, Xufeng
  • Nature Materials, Vol. 13, Issue 7
  • DOI: 10.1038/nmat3973

Thermal Conductivity of Bismuth-Antimony Alloy Single Crystals
journal, October 1968


Current heating induced spin Seebeck effect
journal, December 2013

  • Schreier, Michael; Roschewsky, Niklas; Dobler, Erich
  • Applied Physics Letters, Vol. 103, Issue 24
  • DOI: 10.1063/1.4839395

Dirac-surface-state-dominated spin to charge current conversion in the topological insulator ( Bi 0.22 Sb 0.78 ) 2 Te 3 films at room temperature
journal, November 2017


The Nernst and the Seebeck effects in Te-doped BiSb alloys
journal, February 1970


Origins of the Unidirectional Spin Hall Magnetoresistance in Metallic Bilayers
journal, August 2018


Ultra-Fast Perpendicular Spin–Orbit Torque MRAM
journal, April 2018

  • Cubukcu, Murat; Boulle, Olivier; Mikuszeit, Nikolai
  • IEEE Transactions on Magnetics, Vol. 54, Issue 4
  • DOI: 10.1109/TMAG.2017.2772185

Magnetoresistive Random Access Memory
journal, October 2016


Fermi-level-dependent charge-to-spin current conversion by Dirac surface states of topological insulators
journal, July 2016

  • Kondou, K.; Yoshimi, R.; Tsukazaki, A.
  • Nature Physics, Vol. 12, Issue 11
  • DOI: 10.1038/nphys3833

Current-Induced Switching of Perpendicularly Magnetized Magnetic Layers Using Spin Torque from the Spin Hall Effect
journal, August 2012


Interface-induced phenomena in magnetism
journal, June 2017


Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
journal, June 2015

  • Avci, Can Onur; Garello, Kevin; Ghosh, Abhijit
  • Nature Physics, Vol. 11, Issue 7
  • DOI: 10.1038/nphys3356

Giant Spin Pumping and Inverse Spin Hall Effect in the Presence of Surface and Bulk Spin−Orbit Coupling of Topological Insulator Bi 2 Se 3
journal, September 2015


The Nernst Effect of Bi-Sb Alloys
journal, July 1970

  • Aono, Tomoyoshi
  • Japanese Journal of Applied Physics, Vol. 9, Issue 7
  • DOI: 10.1143/JJAP.9.761

Room-Temperature Spin-Orbit Torque Switching Induced by a Topological Insulator
journal, August 2017


Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator
journal, September 2016


Highly Efficient Spin-to-Charge Current Conversion in Strained HgTe Surface States Protected by a HgCdTe Layer
journal, April 2018


Perpendicular switching of a single ferromagnetic layer induced by in-plane current injection
journal, August 2011

  • Miron, Ioan Mihai; Garello, Kevin; Gaudin, Gilles
  • Nature, Vol. 476, Issue 7359
  • DOI: 10.1038/nature10309

Observation of inverse spin Hall effect in bismuth selenide
journal, September 2014


Room-temperature high spin–orbit torque due to quantum confinement in sputtered BixSe(1–x) films
journal, July 2018


Spin-transfer torque generated by a topological insulator
journal, July 2014

  • Mellnik, A. R.; Lee, J. S.; Richardella, A.
  • Nature, Vol. 511, Issue 7510
  • DOI: 10.1038/nature13534

Spin-momentum locking and spin-orbit torques in magnetic nano-heterojunctions composed of Weyl semimetal WTe2
journal, September 2018


Temperature dependence of ferromagnetic resonance spectra of permalloy on (Bi 1− x Sb x ) 2 Te 3
journal, December 2017

  • Gupta, Sachin; Kanai, Shun; Matsukura, Fumihiro
  • Japanese Journal of Applied Physics, Vol. 57, Issue 2
  • DOI: 10.7567/JJAP.57.020302

Spin-to-charge conversion using Rashba coupling at the interface between non-magnetic materials
journal, December 2013

  • Sánchez, J. C. Rojas; Vila, L.; Desfonds, G.
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms3944

Epitaxial growth and characterization of Bi1-xSbx spin Hall thin films on GaAs(111)A substrates
journal, February 2017

  • Ueda, Yugo; Duy Khang, Nguyen Huynh; Yao, Kenichiro
  • Applied Physics Letters, Vol. 110, Issue 6
  • DOI: 10.1063/1.4975492

Interplay of spin-orbit torque and thermoelectric effects in ferromagnet/normal-metal bilayers
journal, December 2014


Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
journal, March 2014


Spin-polarized tunneling study of spin-momentum locking in topological insulators
journal, June 2015


Unidirectional Spin-Wave-Propagation-Induced Seebeck Voltage in a PEDOT:PSS/YIG Bilayer
journal, January 2018


Transport properties of Bi-RICH Bi-Sb alloys
journal, January 1996


Spin-Electricity Conversion Induced by Spin Injection into Topological Insulators
journal, November 2014


Emerging Three-Terminal Magnetic Memory Devices
journal, October 2016


Spin to Charge Conversion at Room Temperature by Spin Pumping into a New Type of Topological Insulator: α -Sn Films
journal, March 2016


Mapping the chemical potential dependence of current-induced spin polarization in a topological insulator
journal, October 2015

  • Lee, Joon Sue; Richardella, Anthony; Hickey, Danielle Reifsnyder
  • Physical Review B, Vol. 92, Issue 15
  • DOI: 10.1103/PhysRevB.92.155312

Room temperature magnetization switching in topological insulator-ferromagnet heterostructures by spin-orbit torques
journal, November 2017


Bilinear magnetoelectric resistance as a probe of three-dimensional spin texture in topological surface states
journal, February 2018


Spin-to-Charge Conversion in Bi Films and Bi / Ag Bilayers
journal, July 2018


Thermal conductivity of cobalt-base alloys
journal, September 2003

  • Terada, Yoshihiro; Ohkubo, Kenji; Mohri, Tetsuo
  • Metallurgical and Materials Transactions A, Vol. 34, Issue 9
  • DOI: 10.1007/s11661-003-0168-z

Topological Surface States Originated Spin-Orbit Torques in Bi 2 Se 3
journal, June 2015


Enhancement of the anomalous Nernst effect in ferromagnetic thin films
journal, November 2017


A conductive topological insulator with large spin Hall effect for ultralow power spin–orbit torque switching
journal, July 2018


Symmetry and magnitude of spin–orbit torques in ferromagnetic heterostructures
journal, July 2013

  • Garello, Kevin; Miron, Ioan Mihai; Avci, Can Onur
  • Nature Nanotechnology, Vol. 8, Issue 8
  • DOI: 10.1038/nnano.2013.145

Current-Nonlinear Hall Effect and Spin-Orbit Torque Magnetization Switching in a Magnetic Topological Insulator
journal, September 2017


Thermal Contribution to the Spin-Orbit Torque in Metallic-Ferrimagnetic Systems
journal, June 2018


Spin transfer switching and spin polarization in magnetic tunnel junctions with MgO and AlOx barriers
journal, December 2005

  • Diao, Zhitao; Apalkov, Dmytro; Pakala, Mahendra
  • Applied Physics Letters, Vol. 87, Issue 23
  • DOI: 10.1063/1.2139849

Surface-State-Dominated Spin-Charge Current Conversion in Topological-Insulator–Ferromagnetic-Insulator Heterostructures
journal, August 2016


Thermal conductivity of CMOS materials for the optimization of microsensors
journal, September 1993


Nernst Effect in Semimetals: The Effective Mass and the Figure of Merit
journal, February 2007


Efficient charge-spin conversion and magnetization switching through the Rashba effect at topological-insulator/Ag interfaces
journal, January 2018


Bulk rectification effect in a polar semiconductor
journal, March 2017

  • Ideue, T.; Hamamoto, K.; Koshikawa, S.
  • Nature Physics, Vol. 13, Issue 6
  • DOI: 10.1038/nphys4056

Temperature Dependence of the Electrical Properties of Bismuth-Antimony Alloys
journal, June 1959