Chiral Topological Phase 2D Fermi Gas With Spin Orbit Coupling

Phase diagram of a uniform two-dimensional Fermi gas with... - Peeref.
PDF Fermions and Topological Phases.
Hasan Group | Intrinsic Topological Insulators.
PDF Microsoft PowerPoint - Présentation_S.
Topology in gapless systems — Topology in condensed matter: tying.
Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas.
Topological Quantum Computing. What is topological... | Medium.
PDF Transport signatures of spin-orbit coupling.
PDF New Trends in Topological.
Topological superfluid in a trapped two-dimensional polarized Fermi.
Highlights of Condensed Matter Physics (DCMP) Talks @ APS 2020.
Publications | Yan Group - Topological Materials.
(PDF) BCS-BEC crossover in 2D Fermi gases with Rashba spin-orbit.
Majorana Fermions in Chiral Topological Superconductors.

Phase diagram of a uniform two-dimensional Fermi gas with... - Peeref.

Topological thermoelectric effects in spin-orbit coupled electron and hole doped semiconductors. Topological Properties of one-dimensional 2.4 (a) Band structure of the 2DHG in the kx direction for ky = 0. (b) Energy gap at origin between lower bands. Here we have used ↵R = ↵D = 2 ⇥ 105 m/s, hy. We study the stability region of the topological superfluid phase in a trapped two-dimensional polarized Fermi gas with spin-orbit coupling and across a BCS-BEC crossover. Due to the competition between polarization, pairing interaction and spin-orbit coupling, the Fermi gas typically. The chiral magnetic and chiral separation effects---quantum-anomaly-induced electric current and chiral current along an external magnetic field in We show that analogous effects occur in rotating trapped Fermi gases with Weyl-Zeeman spin-orbit coupling where the rotation plays the role of an.

PDF Fermions and Topological Phases.

Spin-orbit coupling is one of the relativistic effects, and it occurs whenever a particle with non-zero spin moves around a region with a finite electric field. The interplay between current-driven spin-orbit torques and chiral magnetic texture at transition metal interfaces has resulted in very fast. Spin-orbit coupling (SOC) in cold-atom systems are now realizable, employing laser radiation impinging on a gas of cold atoms Dalibard et al. To achieve this goal, we consider a model wherein a degenerate Fermi gas of spin F=32 atoms (for example, 6Li or 2H atoms) occupies a 2D optical.

Hasan Group | Intrinsic Topological Insulators.

The recent experimental realization of spin-orbit (SO) coupling for ultracold bosons and fermions opens an exciting avenue for engineering quantum matter that Here we propose an experimental scheme for realizing a 2D Rashba-type SO coupling in a square lattice for pseudospin-1 Fermi gases. Two-dimensional spin-orbit-coupled Fermi gases subject to $s$-wave pairing can be driven into a topological phase by increasing the Zeeman spin splitting beyond a critical value. in the homogeneous topological-superfluid phase of a spin-orbit-coupled 2D Fermi gas with fixed density.

PDF Microsoft PowerPoint - Présentation_S.

No spin-orbit coupling is needed even when the scalar spin chirality vanishes, different from the case of the topological Hall effect and topological SHE We introduce a class of two-dimensional (2D) materials that possess coexisting ferroelectric and topologically insulating orders. Fermi surface topology and low-lying quasiparticle dynamics of parent Fe1+xTe/Se superconductor. "Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface". States are chiral and topologically protected as long as the bulk gap exists. Weak localization for 2D electron gas Unlike the strong disorder regime in which the single-particle wavefunctions Spin-ltered edge states with an electrically tunable gap in a two-dimensional topological crystalline insulator.

Topology in gapless systems — Topology in condensed matter: tying.

Chiral Rashba spin textures in ultracold Fermi gases. Gong M, Tewari S, Zhang C. BCS-BEC crossover and topological phase transition in 3D spin-orbit coupled degenerate Fermi gases. Searching for Majorana fermions in 2D spin-orbit coupled Fermi superfluids at finite temperature. Spin-Orbit Coupled Fermi Gases across a Feshbach Resonance. Chiral topological superconductor from the quantum Hall state. Normal superconductors with Rashba spin-orbit coupling have been explored as candidate systems of topological superconductors. These topological phase transitions are distinctly characterized by variations in the topological Spin-injection spectroscopy of a spin-orbit coupled Fermi gas.

Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas.

Stability of chiral spin liquid phase of the triangular lattice Hubbard model with hopping anisotropy. In this work, we analyze the topological properties of a partial/complete flatband in an apparently We show how the multilevel generalization of interactions, spin-orbit coupling, and external Doubling theorem for Fermi points, degenerate points, and exceptional points in 2D non-Hermitian systems. Two-dimensional spin-orbit-coupled Fermi gases subject to s-wave pairing can be driven into a topological phase by increasing the Zeeman spin We explore the trap profiles of a two-dimensional atomic Fermi gas in the presence of a Rashba spin-orbit coupling and under an adiabatic rotation.

Topological Quantum Computing. What is topological... | Medium.

The quantum-spin-Hall (QSH) phase and its helical edge spins of two-dimensional (2D) topological insulators (TIs) are attracting increasing attention. The helical edge spin currents are a favorite to applications in dissipationless spintronic devices with low error rates because the spin currents.

PDF Transport signatures of spin-orbit coupling.

Topological phase transition. Bulk-edge correspondence. Chiral edges states in the QHE. II) The anomalous quantum Hall effect. or the 2D Chern insulator. • Other spin‐orbit couplings are possible (e.g., Rashba), which introduce off‐ diagonal terms and break spin conservation (no notion of spin up.

PDF New Trends in Topological.

This coupling is particularly important when we consider the spin-orbit interaction, that produces an The periodical boundary conditions of a 2D Brillouin zone denes a topological surface called torus, T 2. We In analogy with QH phase, the topological insulators also have edge or surface states in the. Gives topological superconductivity; does not require Spin-Orbital coupling, nor any. Chiral superfluidity with p-wave symmetry from an interacting s-wave atomic Fermi gas. § Spin polarized Fermi gas (Li-6 atoms), in 3D optical lattices § Already very cool, down to Antiferromagnetic transition.

Topological superfluid in a trapped two-dimensional polarized Fermi.

A topological quantum computer is a device that relies upon topologically ordered states of matter to carry out the fault-tolerant quantum computation. Figure 2: A scheme of realizing Majorana fermions in a 2D system. The Majorana fermions form in vortices created on the superconductor surface in the. Fermi gases with generalized Rashba spin orbit coupling inducedby a synthetic gauge field have the potential of realizing many interesting states such as rashbon condensates and topological phases. Here we develop a fluctuation theory of such systems and demonstrate that beyond-Gaussian effects.

Highlights of Condensed Matter Physics (DCMP) Talks @ APS 2020.

Spin-orbit coupling is generated by using a pair of laser beams that connects the second and third lowest Realization of spin-orbit coupling in an atomic Fermi gas. (a) Energy For more general spin-orbit Hamiltonians involving x , one can extract ~ x Þ with the phase between all three. Spin-Orbit Coupled Fermi Gases Under Adiabatic Rotation. Ko¸c University Graduate School of Sciences and Engineering This is to certify that I have examined this copy of a doctoral We discuss non-interacting Fermi gas under SOC and the mean-eld eld BCS theory for 2D gas with SOC. Abstract: The recent experimental realization of spin-orbit (SO) coupling for ultracold bosons and fermions opens an exciting avenue for engineering quantum Here we propose an experimental scheme for realizing a 2D Dresselhaus-type SO coupling in a square lattice for spin-1 Fermi gases.

Publications | Yan Group - Topological Materials.

• Topological invariants of Fermi surfaces¶. The idea that leads us to the topology of gapless So we are left with only two symmetry classes: A and AIII (no symmetry at all or sublattice/chiral Of course this is the 2D Dirac equation, which should be very familiar now. At the phase transition where. "Weyl Semimetals, Fermi arcs and 2D Topological Superconductors". "Minimal Conductivity, Topological Berry Winding and Duality in "Crossed surface flat bands of Weyl semimetal superconductors". Topologically protected charge transfer along. the edge of a chiral p-wave.

(PDF) BCS-BEC crossover in 2D Fermi gases with Rashba spin-orbit.

2.1. Spin orbit coupling. Consider a 2D electron gas with Rashba spin-orbital coupling. 10 The spin structure near the Fermi surfaces. 2.2. d-wave superconductivity (high T. In 2D and 3D, topological insulator/superconduc-tors have low-energy edge/surface modes. We review two-dimensional topological insulators whose one-dimensional edge states are char-acterized by spin-momentum locking and protected Semiclassically, this eect can be understood by imagining the electrons in the bulk of the 2d plane to be localised due to their cyclotron motion, while.