2020
DOI: 10.21203/rs.3.rs-87924/v1
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Electric-field control of field-free spin-orbit torque switching via laterally modulated Rashba effect in Pt/Co/AlOx structures

Abstract: Spin-orbit coupling effect in structures with broken inversion symmetry, known as the Rashba effect, facilitates spin-orbit torques (SOTs) in heavy metal/ferromagnet/oxide structures, along with the spin Hall effect. Electric-field control of the Rashba effect is established for semiconductor interfaces, but it is challenging in structures involving metals owing to the screening effect. Here, we report that the Rashba effect in Pt/Co/AlOx structures is laterally modulated by electric voltages, generating out-o… Show more

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“…However, the SOC can currently only be tuned by static means, such as doping, preventing the design of architectures where spin, charge, and magnetic interactions can be reversibly modified to enhance device performance or to acquire new functionalities. There are, however, preliminary reports that point to the possibility of gating the interfacial Rashba SOC …”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…However, the SOC can currently only be tuned by static means, such as doping, preventing the design of architectures where spin, charge, and magnetic interactions can be reversibly modified to enhance device performance or to acquire new functionalities. There are, however, preliminary reports that point to the possibility of gating the interfacial Rashba SOC …”
Section: Introductionmentioning
confidence: 99%
“…There are, however, preliminary reports that point to the possibility of gating the interfacial Rashba SOC. 6 The spin Hall magnetoresistance (SHMR) can be used to quantify the SOC in systems such as thin (∼nm) heavy metal layers deposited on a magnetic insulator, such as the yttrium iron garnet Y 3 Fe 5 O 12 (YIG). 7−9 When an electric current, J c , flows in the metal, the spin Hall effect (SHE) induces a perpendicular spin current, J s , with the spin polarization, s, parallel to the film surface.…”
Section: ■ Introductionmentioning
confidence: 99%