Rashba Effect and Raman Spectra of TlO/PtS Heterostructure
arXiv:2012.12408 · doi:10.1021/acsomega.0c06043
Abstract
The possibility to achieve charge-to-spin conversion via Rashba spin-orbit effects provide stimulating opportunities toward the development of nanoscale spintronics. Here we use first-principles calculations to study the electronic and spintronic properties of TlO/PtS heterostructure, for which we have confirmed the dynamical stability by its positive phonon frequencies. An unexpectedly high binding energy of -0.38 eV per unit cell depicts strong interlayer interactions between TlO and PtS. Interestingly, we discover Rashba spin-splitting's (with large value) in the valence band of TlO stemming from interfacial spin-orbit effects caused by PtS. The role of van der Waals binding on the orbital rearrangements has been studied using electron localization function and atomic orbital projections, which explains in detail the electronic dispersion near the Fermi level. Moreover, we explain the distinct band structure alignment in momentum space but separation in real space of TlO/PtS heterostructure. Since 2D TlO still awaits experimental confirmation, we calculate, for the first time, the Raman spectra of pristine TlO and the TlO/PtS heterostructure and discuss peak positions corresponding to vibrational modes of the atoms. These findings offer a promising avenue to explore spin physics for potential spintronics applications via 2D heterostructures.
References in corpus (22)
- Van der Waals density functionals applied to solids
- Valley polarization in MoS2 monolayers by optical pumping
- New Perspectives for Rashba Spin-Orbit Coupling
- Giant Spin-splitting in the Bi/Ag(111) Surface Alloy
- Strong spin-orbit splitting on Bi surfaces
- Large tuneable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3
- PyProcar: A Python library for electronic structure pre/post-processing
- Giant Rashba Splitting in CH3NH3PbBr3 Organic-Inorganic Perovskite
- A two-dimensional spin field-effect transistor
- Large Proximity-Induced Spin Lifetime Anisotropy in Transition Metal Dichalcogenide/Graphene Heterostructures
- Rashba spin-splitting control at the surface of the topological insulator Bi2Se3
- Topological surface state under graphene for two-dimensional spintronics in air
- Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors
- Spin-split bands cause the indirect band gap of (CHNH)PbI: Experimental evidence from circular photogalvanic effect
- Rashba type spin-orbit splitting of quantum well states in ultrathin Pb films
- Gate-tunable Spin-Galvanic Effect in Graphene Topological insulator van der Waals Heterostructures at Room Temperature
- Rashba-like spin splitting along three momentum directions in trigonal layered PtBi2
- Strong Rashba effect in the localized impurity states of halogen-doped monolayer PtSe2
- Electrically Controlled Spin Injection from Giant Rashba Spin-Orbit Conductor BiTeBr
- Origin and evolution of surface spin current in topological insulators
- Engineering Topological Surface States and Giant Rashba Spin Splitting in BiTeI/BiTe Heterostructures
- Tunable Giant Rashba-type Spin Splitting in PtSe/MoSe Heterostructure