Chiral Topological Phase 2D Fermi Gas With Spin Orbit Coupling

13.06.2022

ArXiv:1906.04461v2 [] 19 Dec 2019.
Intoduction to Quantum Phase Transition.
Chiral topological semimetal with multifold band crossings and long.
Newest 'condensed-matter' Questions - Page 26 - Physics Stack Exchange.
Gapless topological Fulde-Ferrell superfluidity induced by an in-plane.
Dynamical phases in quenched spin-orbit-coupled degenerate Fermi gas.
High-throughput search for magnetic topological materials using spin.
Precision mapping the topological bands of 2D spin-orbit.
PDF - Topological Fulde-Ferrell Superfluids of a Spin-Orbit.
Scientific Publications | JILA - Exploring the Frontiers of Physics.
SangEun Han.
Superfluid density and Berezinskii-Kosterlitz-Thouless transition of a.
[PDF] Topological superfluid in a trapped two-dimensional.

ArXiv:1906.04461v2 [] 19 Dec 2019.

Of three-dimensional (3D) ones. Such superﬂuids include 3He A phase,54 spin–orbit (SO) coupled Fermi gases,55 ,56 SO coupled Fulde–Ferrell (FF) superﬂuids57 58 and dipolar Fermi gases.59 Weyl fermions are massless chiral Dirac fermions in 3D mo-mentum space with linear energy dispersion. Such fermions are robust and can only. The films with the order parameters of the 3 He-A and of the planar phase belong to the 2D fully gapped topological materials, which experience the intrinsic quantum Hall effect and spin current QHE (in the absence of magnetic field). Tim Wehling: From optics to superconductivity: Coulomb interactions in two-dimensional materials.

Intoduction to Quantum Phase Transition.

Intoduction to Quantum Phase Transition. As a result of the competition between spin-orbit coupling and population imbalance, the phase diagram for a uniform gas develops a rich structure of phase separation involving gapless superfluid.

Chiral topological semimetal with multifold band crossings and long.

Topological Fermi superfluids have played the central role in various fields of physics. However, all previous studies focus on the cases where Cooper pairs have zero center-of-mass momenta (i.e. normal superfluids). The topology of Fulde-Ferrell superfluids with nonzero momentum pairings have never been explored until recent findings that Fulde-Ferrell superfluids in a spin-orbit coupled. Nov 30, 2018 · Experimental observation of a topological band gap opening in ultracold fermi gases with two-dimensional spin-orbit coupling Phys Rev Lett , 117 ( 2016 ) , Article 235304 CrossRef View Record in Scopus Google Scholar.

Newest 'condensed-matter' Questions - Page 26 - Physics Stack Exchange.

Finally, in a 2D Fermi gas,... Note that such a triplet pairing is similar to a pairing in the Fermi gas with the Rashba spin-orbit coupling,... the spin-orbit coupling includes an in-plane recoiled momentum and hence leads to a chiral p x + ip y pairing with a topological Berry phase. On the other hand, in the current case the single. Unlike other examples of topological order, such as the fractional quantum Hall effect or chiral p-wave superconductors, the emergence of topologically insulating behavior is a one-particle phenomenon, related to the existence of strong spin-orbit coupling. A topologically insulating state in 2D, the quantum spin Hall insulator, was predicted.

Gapless topological Fulde-Ferrell superfluidity induced by an in-plane.

The strong spin-orbit coupling in hole spin qubits enables fast and electrically tunable gates, but at the same time enhances the susceptibility of the qubit to charge noise.... Strong interaction between fermions can completely change the properties of the Fermi gas. In our theoretical study we find a new exotic quantum phase in strongly.

Dynamical phases in quenched spin-orbit-coupled degenerate Fermi gas.

We investigate the ground state of the two-dimensional polarized Fermi gas with spin-orbit coupling and construct the phase diagram at zero temperature. We find there exist phase separation when the binding energy is low. As the binding energy increasing, the topological nontrivial superfluid phase coexist with topologically trivial superfluid phase which is topological phase separation. The. Meanwhile, Sb atom is relatively heavy, thus sizable spin-orbit coupling should be expected in the sample. Besides, Rashba terms usually play significant roles in 2D electron gas systems [32,33,36] and also manifest in topological insulator surface states. For a trivial parabolic band, the Fermi energy is proportional to carrier density.

High-throughput search for magnetic topological materials using spin.

We examine the properties of a one-dimensional Fermi gas with attractive intrinsic (Hubbard) interactions in the presence of spin-orbit coupling and Zeeman fields. Such a system can be realized in the setting of ultracold atoms confined in a 1D optical lattice, and has been proposed to host exotic topological phases and edge modes.

Precision mapping the topological bands of 2D spin-orbit.

Jul 14-Jul 18, Jinlong Yu, Jul 21-Jun 25, Zhifang Xu, July 28-Aug 1, Jiyao chen. Without spin-orbit coupling (SOC), the band structures are spin-polarized with Dirac points at the Fermi level. Remarkably, the 1T-LuN 2 monolayer exhibits an isotropic magnetocrystalline anisotropy energy in the xy plane with in-plane magnetization, indicating easy tunability of more » the magnetization direction. We show that the combination of spin-orbit coupling and in-plane Zeeman field in a two-dimensional degenerate Fermi gas can lead to a larger parameter region for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases than that using spin-imbalanced Fermi gases. The resulting FFLO superfluids are also more stable due to the enhanced energy difference between FFLO and conventional Bardeen-Cooper.

PDF - Topological Fulde-Ferrell Superfluids of a Spin-Orbit.

The topological protection is demonstrated in Fig. 7a for the case of the 2D Fermi gas, where the Fermi surface is the line p = p F in (p x, p y)-space. In the extended (ω, p x, p y)-space this gives rise to singularity in the Green's function on the line at which ω = 0 and p = p F, where the Green's function is not determined.

Scientific Publications | JILA - Exploring the Frontiers of Physics.

We consider the combined effects of large spin-orbit couplings and a perpendicular magnetic field in a 2D honeycomb fermionic lattice. This system provides an elegant setup to generate versatile spin textures propagating along the edge of a sample. The spin-orbit coupling is shown to induce topological phase transitions between a helical quantum spin Hall phase and a chiral spin-imbalanced. And Green11, it is shown that a boundary between a 2D topological p+ ipsuperconducto and a trivial one hosts a single Majorana mode, and in a vortex core a Majo-rana bound state (MBS) is formed. A prime example of a system hosting MBS was introduced by Kitaev12. The model is a chain of spin-less fermions with superconduct-ing p-wave order. The coupling of charge carriers’ quantum-mechanical spin to their momentum. This spin-orbit coupling (SOC) arises from electron movement through the intrinsic electric field of the crystal and can result in topological insulators and superconductors as well as exotic quantum Hall states [1]. Ultracold neutral atoms can experience an analogous.

SangEun Han.

Spin-orbit coupling (SOC) λ has been taken into account in [39] in a imbalanced 2D Fermi gas, and it was found that for large values of the SOC there is a topological phase transition from phase. 2D topological materials offer opportunities that did not exist previously. To begin with, in the structures we will consider the electron gas is on the surface and is directly accessible, unlike semiconductor heterostructures, where it is buried.... many topological materials exhibit very strong spin-orbit coupling, which, under appropriate. Spin states, both intra- and inter-branch pairings can take place and the competition between them results in rich phase structures. An important example here is the topo-logical super uid state in a two-dimensional (2D) Fermi gas with Rashba spin-orbit coupling and an out-of-plane N\ N[FIG. 1: (Color online) Illustration of pairing within the.

Superfluid density and Berezinskii-Kosterlitz-Thouless transition of a.

Sep 10, 2021 · Topological superfluids in two-dimensional Fermi gas with Rashba spin-orbit coupling. By Xiaosen Yang, Ho-Kin Tang, Noah Fan Qi Yuan, Beibing Huang, Guangcan Guo, Ming Gong, Hai-Qing Lin. 2021-09-10. The realization of spin-orbit coupling (SOC) in ultracold atoms has triggered an intensive exploring of topological superfluids in the. Superconductor with strong spin-orbit coupling, when arranged in a 2D lattice, can yield a 2D topological chiral p-wave superconductor whose chiral Majorana edge modes can be observed in scanning tunneling microscope measurements. To shed light on the rich range of possibilities, we analyse the topological properties of a system with dense. The realization of spin-orbit coupling (SOC) in ultracold atoms has triggered an intensive exploring of topological superfluids in the degenerate Fermi gases based on mean-field theory, which has not yet been reported in experiments. Here, we demonstrate the topological phase transitions in the system via the numerically exact quantum Monte Carlo method..

[PDF] Topological superfluid in a trapped two-dimensional.

. Based on the results of first-principles calculations, we develop a generic 2D effective formalism that respects hexagonal symmetry with Rashba.