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We investigate the formation of edge states in graphene ribbons and flakes with proximity induced valley-Zeeman and Rashba spin-orbit couplings in the presence of a perpendicular magnetic field $B$. Two types of edges states appear in the…

介观与纳米尺度物理 · 物理学 2022-06-07 Yaroslav Zhumagulov , Tobias Frank , Jaroslav Fabian

Electron bands in the untwisted bilayer graphene flatten out in a transverse electric field, offering a promising platform for correlated electron physics. We predict that the spin/valley isospin magnetism, resembling that seen in moir\'{e}…

介观与纳米尺度物理 · 物理学 2023-02-07 Zhiyu Dong , Margarita Davydova , Olumakinde Ogunnaike , Leonid Levitov

The so called quantum spin Hall phase is a topologically non trivial insulating phase that is predicted to appear in graphene and graphene-like systems. In this work we address the question of whether this topological property persists in…

介观与纳米尺度物理 · 物理学 2015-07-08 N. A. Garcia-Martinez , J. L. Lado , J. Fernandez-Rossier

It has been recently established that optoelectronic and non-linear transport experiments can give direct access to the dipole moment of the Berry curvature in non-magnetic and non-centrosymmetric materials. Thus far, non-vanishing Berry…

介观与纳米尺度物理 · 物理学 2019-11-22 Raffaele Battilomo , Niccolo' Scopigno , Carmine Ortix

We investigate Fermi liquid states of the ultra-cold magnetic dipolar Fermi gases in the simplest two-component case including both thermodynamic instabilities and collective excitations. The magnetic dipolar interaction is invariant under…

量子气体 · 物理学 2012-05-29 Yi Li , Congjun Wu

Graphene and transition metal dichalcogenide flat-band systems show similar phase diagrams, replete with magnetic and superconducting phases. An abiding question has been whether magnetic ordering competes with superconductivity or…

We predict a specific type of charge Hall effect in undoped ferromagnetic graphene that is generated by the spin Hall mechanism in the absence of an external magnetic field. The essential feature is the so-called spin chiral configuration…

介观与纳米尺度物理 · 物理学 2013-09-27 Babak Zare Rameshti , Malek Zareyan

Recently a scheme has been proposed for generating the 2D Rashba-type spin-orbit coupling (SOC) for ultracold atomic bosons in a bilayer geometry [S.-W. Su et al, Phys. Rev. A \textbf{93}, 053630 (2016)]. Here we investigate the…

量子气体 · 物理学 2017-06-01 Liang-Liang Wang , Qing Sun , W. -M. Liu , G. Juzeliūnas , An-Chun Ji

Bilayer graphene, in the presence of a one-sided spin-orbit interaction (SOI) induced by a suitably chosen substrate, is predicted to exhibit unconventional Quantum Hall states. The new states arise due to strong SOI-induced splittings of…

介观与纳米尺度物理 · 物理学 2018-12-07 Jun Yong Khoo , Leonid Levitov

We introduce and study a minimum two-orbital Hubbard model on a triangular lattice, which captures the key features of both the trilayer ABC-stacked graphene-boron nitride heterostructure and twisted transition metal dichalcogenides in a…

强关联电子 · 物理学 2019-07-17 Constantin Schrade , Liang Fu

Graphene corrugations affect hybridization of $\pi$ and $\sigma$ orbitals of carbon atoms in graphene based systems. It can as well break differently the symmetry of the electron transfer integrals for different strip boundaries. Using…

介观与纳米尺度物理 · 物理学 2024-05-07 M. Pudlak , R. G. Nazmitdinov

We analyze the origin of spin-orbit coupling (SOC) in fluorinated graphene using Density Functional Theory (DFT) and a tight-binding model for the relevant orbitals. As it turns out, the dominant source of SOC is the atomic spin-orbit of…

介观与纳米尺度物理 · 物理学 2016-03-16 R. M. Guzmán-Arellano , A. D. Hernández-Nieves , C. A. Balseiro , Gonzalo Usaj

We investigate the pairing physics in a three-component Fermi-Fermi mixture, where a few impurities are immersed in a non-interacting spin-$\frac{1}{2}$ Fermi gas with synthetic spin-orbit coupling (SOC), and interact attractively with one…

量子气体 · 物理学 2015-06-19 Lihong Zhou , Xiaoling Cui , Wei Yi

Evanescent and tightly confined propagating waves exhibit a remarkable transverse spin density since the longitudinal component of the electric field is not negligible. In this work, we obtain via numerical simulations the electric field…

光学 · 物理学 2016-05-20 Alba Espinosa-Soria , Alejandro Martinez

The coupling of the spin of electrons to their motional state lies at the heart of recently discovered topological phases of matter. Here we create and detect spin-orbit coupling in an atomic Fermi gas, a highly controllable form of quantum…

We introduce effective field theories for the electronic properties of graphene in terms of relativistic fermions propagating in 2+1 dimensions, and outline how strong inter-electron interactions may be modelled by numerical simulation of a…

强关联电子 · 物理学 2015-01-09 Simon Hands , Wes Armour , Costas Strouthos

We investigate the effects of Rashba and intrinsic spin-orbit couplings in graphynes. First, we develop a general method to address spin-orbit couplings within the tight-binding theory. Then, we apply this method to $\alpha$, $\beta$, and…

介观与纳米尺度物理 · 物理学 2014-11-13 Guido van Miert , Vladimir Juricic , Cristiane Morais Smith

The conductivity of the system magnetic dielectric (EuO) - graphene channel - ferroelectric substrate was considered. The magnetic dielectric locally transforms the band spectrum of graphene by inducing an energy gap in it and making it…

材料科学 · 物理学 2019-05-22 Anatolii I. Kurchak , Anna N. Morozovska , Maksym V. Strikha

Two dimensional electron systems at oxide interfaces are often influenced by a Rashba type spin- orbit coupling (SOC), which is tunable by a transverse electric field. Ferromagnetism at the interface can simultaneously induce strong local…

超导电性 · 物理学 2013-08-23 Florian Loder , Arno P. Kampf , Thilo Kopp

We have calculated the optical conductivity of a disorder-free single graphene sheet in the presence of spin-orbit coupling, using the Kubo formalism. Both intrinsic and structural-inversion-asymmetry induced types of spin splitting are…

介观与纳米尺度物理 · 物理学 2010-01-21 P. Ingenhoven , J. Z. Bernad , U. Zuelicke , R. Egger