An origin behind Rashba spin splitting within inverted doped sGe heterostructures

Using the Matsubara Green's function formalism we calculate the temperature dependence of the nonequilibrium spin polarization induced by an external electric field in the presence of spinorbit coupling. The model Hamiltonian includes an isotropic k-cubed form of the Rashba spin-orbit interaction. Such a Hamiltonian captures the electronic and spin properties of two-dimensional electron (hole) gas at the surfaces or interfaces of transition metal oxides or in p-doped semiconductor heterostructures. The induced spin polarization is calculated for the nonmagnetic as well as magnetic electron/hole gas. Relation of the spin polarization to the Berry curvature is also discussed.

show abstract

Deconvolution of Rashba and Dresselhaus spin-orbit coupling by crystal axis dependent measurements of coupled InAs/GaSb quantum wells

Knox

Rosamond

et al. 2018

Phys. Rev. B

View full text Add to dashboard Cite

The Dresselhaus spin orbit interaction is expected to perturb the quantum spin Hall phase predicted to arise within InAs/GaSb coupled quantum wells. As such, to gain a greater understanding of this spin-orbit interaction, the spin orbit coupling in two InAs/GaSb coupled quantum wells, grown along the [001] axis, is investigated along 3 different in-plane crystallographic axes. Due to the crystallographic axis dependence of the Dresselhaus spin orbit coupling, we can deconvolute this coupling from the axis-invariant Rashba spin orbit coupling. We find that the Dresselhaus parameter is robust against an external gate bias and small changes in growth conditions, with an associated Dresselhaus parameter of (0.20±0.07)10-11 eVm being measured across all samples and top gate bias conditions. In addition we show that the asymmetries associated with the coupled quantum well structure, leading to the Rashba spin orbit coupling, are likely to play a dominant role in determining the spin orbit interaction experienced by a quantum spin Hall state as the system is tuned towards charge neutrality.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

An origin behind Rashba spin splitting within inverted doped sGe heterostructures

Abstract: Permanent WRAP URL:

Cited by 3 publications

References 32 publications

Tunable correlation effects of magnetic impurities by cubic Rashba spin-orbit coupling

Tunable correlation effects of magnetic impurities by cubic Rashba spin-orbit coupling

Current-induced spin polarization in the isotropic k -cubed Rashba model: Theoretical study of p -doped semiconductor heterostructures and perovskite-oxide interfaces

Deconvolution of Rashba and Dresselhaus spin-orbit coupling by crystal axis dependent measurements of coupled InAs/GaSb quantum wells

Contact Info

Product

Resources

About