Field-tunable spin-valley transport in monolayer MoS$_2$

• URL: http://arxiv.org/abs/2605.20790v1
• Date: Wed, 20 May 2026 06:37:27 GMT
• Title: Field-tunable spin-valley transport in monolayer MoS$_2$
• Abstract summary: We study field-controlled spin-valley transport in monolayer MoS$ polarized$ through a single electrostatic barrier.<n>By varying both the laser intensity (amplitude) and the polarization shape, we show that the same junction can be switched between valley resonance-selective operation.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study field-controlled spin-valley transport in monolayer MoS$_2$ through a single electrostatic barrier and a uniform off-resonant elliptically polarized irradiation. Starting from the massive Dirac Hamiltonian with intrinsic spin-orbit coupling, we use a high-frequency Floquet expansion to obtain an effective static model with a laser-renormalized mass (gap) term. We solve the scattering problem by spinor matching and derive the exact analytic expression for the transmission. The numerical results show that the drive tunes both the spin-valley-dependent propagation threshold inside the barrier and the Fabry-Pérot phase, creating controllable pass/stop bands. By varying both the laser intensity (amplitude) and the polarization shape, we show that the same junction can be switched between broadband valley filtering and resonance-selective operation, and the valley contrast remains visible in the Landauer conductance. Our findings establish an efficient route for realizing optically reconfigurable valleytronic and spintronic functionalities in MoS$_2$.

Related papers

• Strain- and potential-controlled tunneling in monolayer MoS$_2$ [0.0]
  We study spin- and valley-resolved quantum transport in monolayer MoS$$ under the combined influence of mechanical strain and an external scalar potential.<n>We show that the interplay between strain and electrostatic potential enables efficient control of both valley and spin polarization of the transmitted current.
  arXiv  Detail & Related papers  (2026-07-06T07:57:39Z)
• Gate-Controlled Spin Qubits in Confined Altermagnets [0.0]
  We propose gate-defined spin qubits in electrostatically confined quantum dots.<n>We show that a phase-controlled quadrupolar gate drive implements $X_/2$ and $X_$ rotations by resonantly modulating the confinement anisotropy.<n>We show that the double quantum dot spectrum can be cleanly projected onto isolated quantum dot product states with a nonzero nonlocal Pauli block in the effective logical two-qubit Hamiltonian.
  arXiv  Detail & Related papers  (2026-06-23T05:14:10Z)
• Gate-tunable spin-valley transport via carrier velocity in monolayer WSe$_2$ [0.0]
  We investigate spin- and valley-resolved quantum transport in monolayer tungsten diselenide.<n>We show that the barrier velocity, scalar potential, incidence angle, incident energy, and barrier width serve as effective control parameters for transport.<n>These findings establish combined velocity and potential engineering as a powerful theoretical framework for controlling spin-valley physics in two-dimensional transition-metal dicogenides.
  arXiv  Detail & Related papers  (2026-06-10T17:26:08Z)
• Tailoring pure valley-Zeeman spin-orbit coupling in WSe$_2$-encapsulated monolayer graphene [42.39722022913058]
  Engineering proximity effects in twisted van der Waals heterostructures offers a powerful platform for designing electronic properties.<n>We report pure valley-Zeeman spin-orbit coupling in monolayer graphene, achieved by encapsulation between two parallel twisted WSe$$ monolayers.<n>We also demonstrate the ability to completely quench the proximity spin-orbit coupling by tuning the encapsulated geometry.
  arXiv  Detail & Related papers  (2026-06-02T07:43:48Z)
• Laser-assisted tunneling in a static tungsten diselenide WSe$_2$ barrier [0.0]
  We study the tunneling effect of Dirac fermions in a monolayer WSe$$ subjected to a static electrostatic barrier and irradiated by a linearly polarized laser field.<n>Results show that the laser field induces a rich Floquet sideband structure, whose number and strength increase with the driving parameter $$.<n>This technology allows for the development of new optoelectronic devices, including quantum filters and light-controlled nanoscale transistors.
  arXiv  Detail & Related papers  (2026-05-12T08:16:44Z)
• Electrical Control of Optically Active Single Spin Qubits in ZnSe [31.528313704663745]
  Electrical control of single donor qubits inSe quantum wells improves optical and spin addressability.<n>Results identify electrical control as a versatile pathway to significantly improve optical and spin addressability.
  arXiv  Detail & Related papers  (2025-12-25T01:48:15Z)
• 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)
• Spin-photon coupling using circular double quantum dots [29.12967812474298]
  We analyze a microwave spin-photon interface based on a circular double quantum dot.<n>We show how ring states form at crossings of odd and even geometrical parity orbital states.<n>We show that the system exhibits a second-order charge-noise sweet spot at a specific magnetic field angle.
  arXiv  Detail & Related papers  (2025-09-18T10:13:43Z)
• Electrically tunable quantum interference of atomic spins on surfaces [43.73138793116028]
  We demonstrate electrical control of quantum interference using atomic spins on an insulating film in a scanning tunneling microscope.<n>We modulate the atomically-confined magnetic interaction between the probe tip and surface atoms with a strong electric field, and drive the spin state rapidly through the energy-level anticrossing.<n>Results open new avenues for all-electrical quantum manipulation in spin-based quantum processors.
  arXiv  Detail & Related papers  (2025-06-01T14:28:36Z)
• Mixed spin-boson coupling for qubit readout with suppressed residual shot-noise dephasing [0.3562485774739681]
  We study a coupling that is mixed between two pairs of quadratures of a bosonic mode and a spin.<n>In this setting, we can suppress the dispersive shift while retaining a nonzero Kerr shift.<n>We demonstrate this configuration with a simple toy model, quantify the expected improvements to photon shot-noise dephasing of the spin, and describe an approach to fast qubit readout via the Kerr shift.
  arXiv  Detail & Related papers  (2025-03-17T17:40:28Z)
• A driven quantum superconducting circuit with multiple tunable degeneracies [0.0]
  We present the experimental discovery of multiple simultaneous degeneracies in the spectrum of a Kerr oscillator subjected to a squeezing drive. Remarkably, these degeneracies can be turned on-and-off on demand, and their number is tunable.
  arXiv  Detail & Related papers  (2022-11-08T23:15:29Z)
• Valleytronic full configuration-interaction approach: An application to the excitation spectra of Si double-dot qubits [0.0]
  We study the influence of strong electron-electron interactions and Wigner-molecule (WM) formation on the spectra of Si qubits. We present results for both the $E_rm ST E_V$ and $E_rm ST E_V$ cases.
  arXiv  Detail & Related papers  (2022-08-11T03:55:52Z)
• Quantum control of the tin-vacancy spin qubit in diamond [41.74498230885008]
  Group-IV color centers in diamond are a promising light-matter interface for quantum networking devices. The negatively charged tin-vacancy center (SnV) is particularly interesting, as its large spin-orbit coupling offers strong protection against phonon dephasing. We demonstrate multi-axis coherent control of the SnV spin qubit via an all-optical stimulated Raman drive.
  arXiv  Detail & Related papers  (2021-06-01T18:36:12Z)
• Control of spectroscopic features of multiphoton transitions in two coupled qubits by driving fields [0.0]
  We study the quantum levels population behavior of the two coupled flux qubits depending on the external driving field characteristics. We describe the controllable features of their formation and thereby creating or destroying entanglement. We numerically demonstrate, that the positions of multiphoton resonances are stable to dissipative processes.
  arXiv  Detail & Related papers  (2021-03-26T06:18:38Z)
• Multimode-polariton superradiance via Floquet engineering [55.41644538483948]
  We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density of excitation of the atomic cloud.
  arXiv  Detail & Related papers  (2020-11-24T19:00:04Z)

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.