Rashba contribution of 2D Dirac-Weyl fermions: Beyond ordinary quantum
regime
- URL: http://arxiv.org/abs/2208.07661v2
- Date: Fri, 6 Jan 2023 08:23:47 GMT
- Title: Rashba contribution of 2D Dirac-Weyl fermions: Beyond ordinary quantum
regime
- Abstract summary: We study the energy levels of Dirac-Weyl fermions in graphene subject to a magnetic field with Rashba contribution in the minimal length situation.
As it comes to applications for 2D Dirac-like quasiparticles, we also extend our theory and results in some special cases.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study the energy levels of Dirac-Weyl fermions in graphene subject to a
magnetic field with Rashba contribution in the minimal length situation. The
exact solution for the energy dispersion of Dirac-like charge carriers coupled
to the magnetic moments in a (2+1)-dimension is obtained by the use of the
momentum space representation. Moreover, as it comes to applications for 2D
Dirac-like quasiparticles, we also extend our theory and results in some
special cases, showing that the emerging energy spectrum at the high magnetic
field limit becomes independent of the Rashba coupling, $\lambda_{R}$, and the
band index of Landau levels.
Related papers
- Confinement in a magnetically induced WSe$_2$ quantum dots [0.0]
We study the confinement of massive Dirac fermions in a WSe$$ quantum dot generated by a localized magnetic field.<n>Our results show that the localized magnetic field provides an efficient mechanism to suppress Klein tunneling and promote the formation of stable quasibound states.
arXiv Detail & Related papers (2026-07-01T17:24:43Z) - Fermi surface change and $d$-wave superconductivity in the square lattice Kondo-Heisenberg model [38.80690522643898]
We study the two-dimensional Kondo-Heisenberg model on a square lattice, with the conduction electrons away from half-filling, using neural network quantum states.<n>Our results establish Fermi volume change and unconventional superconductivity as intrinsic features of the two-dimensional Kondo-Heisenberg model.
arXiv Detail & Related papers (2026-06-22T18:00:04Z) - An integrated neural wavefunction solver for spinful Fermi systems [41.99844472131922]
We present an approach to solving the ground state of Fermi systems that contain spin or other discrete degrees of freedom in addition to continuous coordinates.<n>A transformer achieves both continuous position and discrete spin as inputs universal approximation to spinful generalized orbitals.<n>We validate the method on a range of two-dimensional material problems.
arXiv Detail & Related papers (2025-10-21T13:20:31Z) - Optimising germanium hole spin qubits with a room-temperature magnet [33.7054351451505]
Germanium spin qubits exhibit strong spin-orbit interaction, which allow for high-fidelity qubit control.<n>Superconducting vector magnets are often used to minimize dephasing due to hyperfine interactions.<n>We explore whether a permanent magnet outside the cryostat can be used as an alternative.
arXiv Detail & Related papers (2025-07-04T08:48:57Z) - Landau levels of a Dirac electron in graphene from non-uniform magnetic fields [9.300724928150492]
We show that there are certain non-uniform magnetic fields which lead to a spectrum consisting of the Landau levels.<n>In particular, by considering isospectral deformations of the uniform magnetic field, we present explicit expressions for non-uniform magnetic fields that are strictly isospectral to their uniform counterpart.
arXiv Detail & Related papers (2025-06-26T17:50:05Z) - Antiferromagnetic Quantum Anomalous Hall Effect Modulated by Spin Flips and Flops [23.17305544412557]
We fabricate a device of 7-septuple-layer MnBi2Te4 covered with AlOx capping layer.
We uncover a cascade of quantum phase transitions that can be attributed to the influence of spin configurations on charge transport.
The versatile tunability of the quantum anomalous Hall effect in MnBi2Te4 paves the way for potential applications in topological antiferromagnetic spintronics.
arXiv Detail & Related papers (2024-05-14T15:08:07Z) - Ferrimagnetism of ultracold fermions in a multi-band Hubbard system [34.95884242542007]
We report on signatures of a ferrimagnetic state realized in a Lieb lattice at half-filling.
We demonstrate its robustness when increasing repulsive interactions from the non-interacting to the Heisenberg regime.
Our work paves the way towards exploring exotic phases in related multi-orbital models such as quantum spin liquids in kagome lattices and heavy fermion behavior in Kondo models.
arXiv Detail & Related papers (2024-04-26T17:33:26Z) - The strongly driven Fermi polaron [49.81410781350196]
Quasiparticles are emergent excitations of matter that underlie much of our understanding of quantum many-body systems.
We take advantage of the clean setting of homogeneous quantum gases and fast radio-frequency control to manipulate Fermi polarons.
We measure the decay rate and the quasiparticle residue of the driven polaron from the Rabi oscillations between the two internal states.
arXiv Detail & Related papers (2023-08-10T17:59:51Z) - Casimir effect of Lorentz-violating charged Dirac in background magnetic
field [0.0]
We study the effect of the Lorentz symmetry breaking on the Casimir energy of charged Dirac in the presence of a uniform magnetic field.
We investigate two cases of the direction of violation, namely, time-like and space-like vector cases.
We discuss how the Lorentz violation and the magnetic field affect the structure of the Casimir energy and its pressure.
arXiv Detail & Related papers (2023-07-10T09:57:36Z) - Magnetic catalysis in weakly interacting hyperbolic Dirac materials [0.0]
We show that application of strong external magnetic fields by virtue of producing a emphfinite density of states near the zero energy triggers the condensation of the CDW order even for emphsimal $V$.
We present scaling of the CDW order with the total flux enclosed by hyperbolic Dirac materials for a wide range of (especially subcritical) $V$.
arXiv Detail & Related papers (2023-05-18T17:59:32Z) - One-dimensional scattering of fermions in double Dirac delta potentials [0.0]
The spectrum of bound and scattering states of the one dimensional Dirac Hamiltonian describing fermions distorted by a static background is studied.
A distinction will be made between mass-spike and electrostatic Dirac delta-potentials.
arXiv Detail & Related papers (2023-05-03T17:20:34Z) - Manipulating Generalized Dirac Cones In Quantum Metasurfaces [68.8204255655161]
We consider a collection of single quantum emitters arranged in a honeycomb lattice with subwavelength periodicity.
We show that introducing uniaxial anisotropy in the lattice results in modified dispersion relations.
arXiv Detail & Related papers (2022-03-21T17:59:58Z) - Ritus functions for graphene-like systems with magnetic fields generated
by first-order intertwining operators [0.0]
We construct the exact propagator for Dirac fermions in graphene-like systems immersed in external static magnetic fields with non-trivial dependence.
The propagator is spanned on the basis of the Ritus eigenfunctions, corresponding to the Dirac fermion states in the non-trivial magnetic field background.
arXiv Detail & Related papers (2022-01-10T23:14:25Z) - Spin-1/2 particles under the influence of a uniform magnetic field in
the interior Schwarzschild solution [62.997667081978825]
relativistic wave equation for spin-1/2 particles in the interior Schwarzschild solution in the presence of a uniform magnetic field is obtained.
Results are relevant to the physics of the interior of neutron stars, where both the gravitational and the magnetic fields are very intense.
arXiv Detail & Related papers (2021-11-30T14:46:00Z) - Remarks on Fermions in a Dipole Magnetic Field [0.0]
This work is a continuation of our recent study of non-relativistic charged particles, confined to a sphere enclosing a magnetic dipole at its center.
We extend our computations in two significant ways. The first is to a relativistic spin-$frac12$ fermion and the second concerns the interpretation of the physics.
arXiv Detail & Related papers (2021-07-21T13:42:03Z) - Majorana bound states in topological insulators with hidden Dirac points [25.488181126364186]
We show that well-defined Majorana bound states can be obtained even in materials with hidden Dirac point.
The obtained topological phase diagram allows one to extract precisely the position of the Dirac point in the spectrum.
arXiv Detail & Related papers (2020-04-22T15:04:39Z) - Spin current generation and control in carbon nanotubes by combining
rotation and magnetic field [78.72753218464803]
We study the quantum dynamics of ballistic electrons in rotating carbon nanotubes in the presence of a uniform magnetic field.
By suitably combining the applied magnetic field intensity and rotation speed, one can tune one of the currents to zero while keeping the other one finite, giving rise to a spin current generator.
arXiv Detail & Related papers (2020-01-20T08:54:56Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.