Spin Orbit Coupling And Topological Phases

Realization of two-dimensional spin-orbit coupling for Bose.
Topological phase transitions on the square-hexagon lattice.
Topological Systems and Spin-Orbit Coupling | NIST.
Ultra-Strong Spin-Orbit Coupling and Topological Moiré.
Topological superconducting phases in disordered quantum wires with.
Edge States and Topological Insulating Phases Generated by.
Effect of spin-orbit coupling on the high harmonics from the.
First- and Second-Order Topological Superconductivity and.
Spin-orbit coupling controlling the topological vortical phase.
Topological metallic phases in spin-orbit coupled bilayer systems.
Spin-Orbit Coupling - an overview | ScienceDirect Topics.
Spin Orbit Coupling leading to topological insulator behaviour.
Physics - On-Demand Spin-Orbit Coupling.
STM Studies of Spin-Orbit Coupled Phases in Real- and.

Realization of two-dimensional spin-orbit coupling for Bose.

Cold atoms with laser-induced spin-orbit (SO) interactions provide promising platforms to explore novel quantum physics, in particular the exotic topological phases, beyond natural conditions of solids. The past several years have witnessed important progresses in both theory and experiment in the study of SO coupling and novel quantum states for ultracold atoms. Here we review the physics of. Dec 16, 2015 · We prove that curvature effects in low-dimensional nanomaterials can promote the generation of topological states of matter by considering the paradigmatic example of quantum wires with Rashba spin-orbit coupling, which are bent in a nanoscale periodic serpentine structure. The effect of the periodic curvature generally results in the appearance of insulating phases with a corresponding novel. 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 93, 053630 (2016.

Topological phase transitions on the square-hexagon lattice.

The two-dimensional spin-imbalanced Fermi gas subject to s-wave pairing and spin-orbit coupling is considered a promising platform for realizing a topological chiral-p-wave super uid. In the BCS limit of s-wave pairing, i.e., when Cooper pairs are only weakly bound, the system enters the topo. Topological Fulde-Ferrell Superfluids of a Spin. The two-photon Raman coupling imprints a momentum difference to the two spin states due to momentum transfer in the twophoton process, and induce a spin-flip transition which opens a Zeeman gap at zero momentum. The whole effects generate a 1D SO coupling together with a Zeeman term. - "Spin-orbit coupling and topological phases for ultracold. Zeeman fields can drive semiconductor quantum wires with strong spin-orbit coupling and in proximity to s-wave superconductors into a topological phase which supports end Majorana fermions and offers an attractive platform for realizing topological quantum information processing. Here, we investigate how potential disorder affects the topological phase by a combination of analytical and.

Topological Systems and Spin-Orbit Coupling | NIST.

Oct 26, 2021 · We predict that twisted bilayers of 1T-ZrS$_2$ realize a novel and tunable platform to engineer two-dimensional topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS$_2$ heterostructures give rise to an emergent and twist-controlled moiré Kagomé lattice, combining geometric frustration and strong spin-orbit coupling to give rise to a moiré.

Ultra-Strong Spin-Orbit Coupling and Topological Moiré.

Aug 18, 2014 · Another important result induced by the modulated spin-orbit coupling is that by increasing spin-orbit coupling to make (but ), although the dimerization configuration keeps the same, the topological properties of both sides are changed (as shown in fig. 2(a), (b)). A direct result of the simultaneous change is the disappearance of the moving. The spin-orbit coupling is found to change the hopping terms in the unit cell and therefore change the winding vectors. • The Zeeman field can only shift the winding vectors along the x-axis. • The existence of the zero-mode of the H + H can used to judge the topological non-trivial phases. 1. Introduction. Mar 07, 2013 · We present a systematic study on the influence of Rashba spin-orbit coupling, interlayer potential difference, and exchange field on the topological properties of bilayer graphene. In the presence of only Rashba spin-orbit coupling and interlayer potential difference, the band gap opening due to broken out-of-plane inversion symmetry offers new possibilities of realizing tunable topological.

Topological superconducting phases in disordered quantum wires with.

Without spin-orbital coupling (SOC), we find a triple degenerate point with a quadratic dispersion, demonstrated by an effective Hamiltonian. When SOC is included, the sign of SOC could determine the topological phases of materials: a negative SOC contributes a Dirac semimetal phase with a quadratic energy dispersion, whereas a positive SOC. Cold atoms with laser-induced spin-orbit (SO) interactions provide promising platforms to explore novel quantum physics, in particular the exotic topological phases, beyond natural conditions of solids. The past several years have witnessed important progresses in both theory and experiment in the study of SO coupling and novel quantum states for ultracold.

Edge States and Topological Insulating Phases Generated by.

Mar 24, 2015 · Spin-orbit coupling—the interaction of a particle’s motion with its spin—typically arises for electrons orbiting an atom or moving through a crystal lattice. But it can also be “engineered” in cold atomic gases by hitting the atoms with laser beams. Researchers have now shown how this atomic spin-orbit coupling can be tuned in real.

Effect of spin-orbit coupling on the high harmonics from the.

Topological Systems and Spin-Orbit Coupling. Phase transitions in condensed matter physics generally have been identified with an order parameter that spontaneously breaks the symmetry of the system and develops long range order, such as for the magnetization that develops in a ferromagnet below the Curie temperature or the staggered. We investigate the combined effects of spin-orbit coupling and rotation on the topological vortical phase transition in F = 2 Bose-Einstein condensates. We find that the spin-orbit coupling can precisely manipulate the canonical atom current which is generated in the opposite direction of the gauge atom current and causes both a continuous and a discontinuous canonical angular momentum.

First- and Second-Order Topological Superconductivity and.

Oct 07, 2016 · Our realization of 2D SO coupling with advantages of small heating and topological stability opens a broad avenue in cold atoms to study exotic quantum phases, including topological superfluids. The spin-orbit (SO) interaction of an electron is a relativistic quantum mechanics effect that characterizes the coupling between the motion and spin. Spin-orbit SO coupling, the interaction between spin and orbital e.g., momentum degrees of freedom of a particle, plays an important role in many topological phases of matter. In ultracold atomic gases, synthetic SO coupling has been realized by coupling atomic hyperfine ground states denoted. Spin orbit coupling and topological phases.

Spin-orbit coupling controlling the topological vortical phase.

Oct 17, 2016 · The non-trivial topological properties of TIs and TCIs arise from strong spin-orbit coupling leading to an inverted band structure; which also leads to the chiral spin texture in momentum space. In this project we used low temperature scanning tunneling microscopy (STM) and spectroscopy (STS) to study materials with topological phases in real.

Topological metallic phases in spin-orbit coupled bilayer systems.

Oct 27, 2014 · Spin-orbit (SO) coupling is the crucial parameter to drive topological-insulating phases in electronic band models. In particular, the generic emergence of SO coupling involves the Rashba term which fully breaks the SU(2) spin symmetry. As soon as interactions are taken into account, however, many theoretical studies have to content themselves with the analysis of a simplified U(1)-conserving.

Spin-Orbit Coupling - an overview | ScienceDirect Topics.

Spin Orbit Coupling leading to topological insulator behaviour.

Also, the effects of the Rashba spin-orbit coupling and staggered potential are discussed. We find that the Rashba spin-orbit coupling can drive the square-hexagon lattice into topological nontrivial phase at 1/5 and 2/5 filling fraction. The helical edge states are given numerically to confirm the topological property of square-hexagon lattice. The precession of its spin axis become interrelated, allowing the use of electric elds to control spin-related properties. The introduction of theoretical spin-based transistors which operate electrically has set a new focus onto the spin-orbit coupling physics in semiconducting materials.

Physics - On-Demand Spin-Orbit Coupling.

Both without spin-orbit coupling (SOC) and with SOC cases are performed to study the details of the nodal line states in the following discussion. To confirm the dynamic stability of the optimized structure, we calculated phonon spectra of MoTe using the density functional perturbation theory (DFPT) based on 2 × 4 × 1 supercell by PHONOPY.

STM Studies of Spin-Orbit Coupled Phases in Real- and.

The theory of the topological insulator phase that emerges via spin-orbit coupling in three-dimensional materials is introduced, stressing its relationship to earlier topological phases in two dimensions. An unusual surface state with an odd number of “Dirac points” appears as a consequence of bulk topological invariants of the band. The recent experimental realization of spin-orbit (SO) coupling for ultracold bosons and fermions opens an exciting avenue for engineering quantum matter that may be challenging to realize in solid-state materials such as SO-coupled pseudospin-1 fermions. While one-dimensional SO coupling for spin-1 bosons has been experimentally realized, the generation of two-dimensional (2D) SO coupling and. Jan 18, 2016 · Experimentally these effects have been combined by the proximity-coupling of super-conducting leads and high spin–orbit materials such as InSb and InAs, or by controlled Cu-doping of topological insu-lators such as Bi 2 Se 3. However, for practical purposes, a single-phase material which intrinsically displays both these effects is highly.