Finite transverse conductance and anisotropic magnetoconductance under an applied in-plane magnetic field in two-dimensional electron gases with strong spin-orbit coupling.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Abhiram Soori

Abstract

The current in response to a bias in certain two-dimensional electron gas (2DEG), can have a nonzero transverse component under a finite magnetic field applied in the plane where electrons are confined. This phenomenon known as planar Hall effect (PHE) is accompanied by dependencies of both the longitudinal and the transverse components of the current on the angleϕbetween the bias direction and the magnetic field. This effect can be observed in a variety of systems, for example in topological insulators where spin-momentum locking of the topologically protected surface states is the root cause for the effect and in magnetic systems where anisotropic magnetic ordering induces it. In 2DEG with spin orbit coupling (SOC) such as oxide interfaces, this effect has been experimentally witnessed. Further, a fourfold oscillation in longitudinal resistance as a function ofϕhas also been observed. Motivated by these, we perform scattering theory calculations on a 2DEG with SOC in presence of an in-plane magnetic field connected to two-dimensional leads on either sides to obtain longitudinal and transverse conductances. We find that the longitudinal conductance isπ-periodic and the transverse conductance is 2π-periodic inϕ. The magnitude o...Continue Reading

References

Mar 11, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·J LiD N Zheng
Dec 23, 2014·Nature Nanotechnology·Pojen ChuangTse-Ming Chen
Nov 8, 2017·Nature Communications·A A TaskinYoichi Ando
Dec 9, 2017·Physical Review Letters·S NandySumanta Tewari
May 24, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Ritu NehraAbhiram Soori
Aug 7, 2019·Physical Review Letters·Pan HeHyunsoo Yang
Aug 31, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Abhiram Soori
Jun 2, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Dhavala Suri, Abhiram Soori

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