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We propose a method to describe the evolution of two spins coupled by hyperfine interaction in an external time-dependent magnetic field. We apply the approach to the case of hyperfine interaction with axial symmetry, which can be solved…

Quantum Physics · Physics 2021-07-07 Yuri Belousov , Roberto Grimaudo , Antonino Messina , Agostino Migliore , Alessandro Sergi

Over the past two decades, the research of (Ga,Mn)As has led to a deeper understanding of relativistic spin-dependent phenomena in magnetic systems. It has also led to discoveries of new effects and demonstrations of unprecedented…

We introduce a $p_{z}-d$ coupling model Hamiltonian for the $\pi$-graphene/Au bands that predicts a rather large intrinsic spin-orbit (SO) coupling as are being reported in recent experiments and DFT studies. Working within the analytical…

Materials Science · Physics 2019-10-03 Alejandro Lopez , Luis Colmenarez , Mayra Peralta , Francisco Mireles , Ernesto Medina

We investigate the magnetic characteristics and tunnelling signatures of a planar Josephson junction with Rashba spin-orbit coupling during the fusion of two Majorana vortices. By employing the topological phase diagram and conducting…

Mesoscale and Nanoscale Physics · Physics 2024-09-27 Krishnan Ganesh , Derek K. K. Lee , Jiannis K. Pachos

We propose and investigate a simple one-dimensional model for a single-channel quantum wire hosting electrons that interact repulsively and are subject to a significant spin-orbit interaction. We show that an external Zeeman magnetic field,…

Strongly Correlated Electrons · Physics 2020-10-29 Ren-Bo Wang , Akira Furusaki , Oleg A. Starykh

Lightly-doped rhombohedral multilayer graphene has recently emerged as one of the most promising material platforms for exploring electronic phases driven by strong Coulomb interactions and non-trivial band topology. This review highlights…

Strongly Correlated Electrons · Physics 2024-08-29 Tobias Wolf , Nemin Wei , Haoxin Zhou , Chunli Huang

Hybrids of graphene and two dimensional transition metal dichalcogenides (TMDC) have the potential to bring graphene spintronics to the next level. As we show here by performing first-principles calculations of graphene on monolayer…

Mesoscale and Nanoscale Physics · Physics 2015-10-14 Martin Gmitra , Jaroslav Fabian

Recently, a diffusion Monte Carlo algorithm was applied to the study of spin dependent interactions in condensed matter. Following some of the ideas presented therein, and applied to a Hamiltonian containing a Rashba-like interaction, a…

Strongly Correlated Electrons · Physics 2015-05-27 Alberto Ambrosetti , Pier Luigi Silvestrelli , Flavio Toigo , Lubos Mitas , Francesco Pederiva

The impact of proximity-induced spin-orbit and exchange coupling on the correlated phase diagram of rhombohedral trilayer graphene (RTG) is investigated theoretically. By employing \emph{ab initio}-fitted effective models of RTG…

Strongly Correlated Electrons · Physics 2024-05-13 Yaroslav Zhumagulov , Denis Kochan , Jaroslav Fabian

The emergence of the magnetic minibads in the quasienergy spectrum of graphene superlattice subjected to the quantizing magnetic field and electromagnetic radiation was investigated. The graphene superlattice was assumed to be formed by…

Mesoscale and Nanoscale Physics · Physics 2017-07-04 S. V. Kryuchkov , E. I. Kukhar

Here we present a flexible strategy to realize robust nanomaterials exhibiting valence electronic structures whose fundamental physics is described by the SSH-Hamiltonian. These solid-state materials are realized using atomically precise…

Semiconductor-superconductor heterostructures represent a promising platform for the detection of Majorana zero modes and subsequently the processing of quantum information using their exotic non-Abelian statistics. Theoretical modeling of…

The Rashba effect as an electrically tunable spin-orbit interaction is the base for a multitude of possible applications such as spin filters, spin transistors, and quantum computing using Majorana states in nanowires. Moreover, this…

Mesoscale and Nanoscale Physics · Physics 2016-10-13 Jan Raphael Bindel , Mike Pezzotta , Jascha Ulrich , Marcus Liebmann , Eugene Sherman , Markus Morgenstern

In commensurate twisted homobilayers, purely radial Rashba spin-orbit fields can emerge. We employ first-principles calculations to investigate the band structures and the spin-orbit fields close to the high-symmetry points $K$ and $\Gamma$…

Mesoscale and Nanoscale Physics · Physics 2026-01-30 Thomas Naimer , Paulo E. Faria Junior , Klaus Zollner , Jaroslav Fabian

We present calculations of the quasiparticle energies and band gaps of graphene nanoribbons (GNRs) carried out using a first-principles many-electron Green's function approach within the GW approximation. Because of the quasi-one-dimension…

Mesoscale and Nanoscale Physics · Physics 2007-11-11 Li Yang , Cheol-Hwan Park , Young-Woo Son , Marvin L. Cohen , Steven G. Louie

We study the transverse electron focusing in a two dimensional electron gas with Rashba spin-orbit coupling. We show that the interplay between the external magnetic field and the spin-orbit coupling gives two branches of states with…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Gonzalo Usaj , C. A. Balseiro

We compute analytic expressions for the edge states in a zigzag Kane-Mele nanoribbon (KMNR) by solving the eigenvalue equations in presence of intrinsic and Rashba spin-orbit couplings. Owing to the P-T symmetry of the Hamiltonian the edge…

Mesoscale and Nanoscale Physics · Physics 2019-05-23 Priyanka Sinha , Sudin Ganguly , Saurabh Basu

The effect of Rashba spin-orbit interaction and anisotropic strain on the electronic, optical and thermodynamic properties of artificial graphene-like superlattice composed of InAs-GaAs quantum dots has been considered theoretically. The…

Mesoscale and Nanoscale Physics · Physics 2019-11-27 Vram Mughnetsyan , Aram Manaselyan , Manuk Barseghyan , Albert Kirakosyan , David Laroze

Carbon-based magnetic structures promise significantly longer coherence times than traditional magnetic materials, which is of fundamental importance for spintronic applications. An elegant way of achieving carbon-based magnetic moments is…

Mesoscale and Nanoscale Physics · Physics 2023-07-19 Qiang Sun , Xuelin Yao , Oliver Groning , Kristjan Eimre , Carlo A. Pignedoli , Klaus Müllen , Akimitsu Narita , Roman Fasel , Pascal Ruffieux

The spin precession in a cylindrical semiconductor nanowire due to Rashba spin-orbit coupling has been investigated theoretically using an InAs nanowire containing a surface two-dimensional electron gas as a model. The eigenstates,…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 A. Bringer , Th. Schäpers
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