Topological states and interplay between spin-orbit and Zeeman interactions in a spinful Su-Schrieffer-Heeger nanowire

• URL: http://arxiv.org/abs/2104.07291v2
• Date: Wed, 28 Jul 2021 01:16:08 GMT
• Title: Topological states and interplay between spin-orbit and Zeeman interactions in a spinful Su-Schrieffer-Heeger nanowire
• Authors: Zhi-Hai Liu, O. Entin-Wohlman, A. Aharony, J. Q. You, and H. Q. Xu
• Abstract summary: We study the interplay between the spin-orbit and Zeeman interactions acting on a spinful Su-Schrieffer-Heeger model. In the absence of the Zeeman field, we prove that the topology of the chain is not affected by the Rashba spin-orbit interaction. Remarkably, the joint effect of the two spin-related interactions leads to novel edge states that appear in the gap formed by the anti-crossing of the bands of a finite spinful dimerized chain.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The interplay between the spin-orbit and Zeeman interactions acting on a spinful Su-Schrieffer-Heeger model is studied based on an InAs nanowire subjected to a periodic gate potential along the axial direction. It is shown that a nontrivial topological phase can be achieved by regulating the confining-potential configuration. In the absence of the Zeeman field, we prove that the topology of the chain is not affected by the Rashba spin-orbit interaction due to the persisting chiral symmetry. The energies of the edge modes can be manipulated by varying the magnitude and direction of the external magnetic field. Remarkably, the joint effect of the two spin-related interactions leads to novel edge states that appear in the gap formed by the anti-crossing of the bands of a finite spinful dimerized chain, and can be merged into the bulk states by tilting the magnetic-field direction.

Related papers

• Bath-engineering magnetic order in quantum spin chains: An analytic mapping approach [0.0]
  Dissipative processes can drive different magnetic orders in quantum spin chains. We show how to structure different magnetic orders in spin systems by controlling the locality of the attached baths.
  arXiv  Detail & Related papers  (2024-01-11T19:10:36Z)
• Spin Rotations in a Bose-Einstein Condensate Driven by Counterflow and Spin-independent Interactions [0.0]
  We observe spin rotations caused by atomic collisions in a non-equilibrium Bose-condensed gas of $87$Rb. A local magnetodynamic model captures the salient features of the observed spin textures.
  arXiv  Detail & Related papers  (2023-08-30T14:46:50Z)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• Magnon boundary states tailored by longitudinal spin-spin interactions and topology [1.0581512835598348]
  We find topological edge states and defect edge states of magnon excitations in a dimerized Heisenberg XXZ chain. Our work opens an avenue for exploring topological magnon excitations and has potential applications in topological magnon devices.
  arXiv  Detail & Related papers  (2022-02-24T08:24:59Z)
• Anisotropic electron-nuclear interactions in a rotating quantum spin bath [55.41644538483948]
  Spin-bath interactions are strongly anisotropic, and rapid physical rotation has long been used in solid-state nuclear magnetic resonance. We show that the interaction between electron spins of nitrogen-vacancy centers and a bath of $13$C nuclear spins introduces decoherence into the system. Our findings offer new insights into the use of physical rotation for quantum control with implications for quantum systems having motional and rotational degrees of freedom that are not fixed.
  arXiv  Detail & Related papers  (2021-05-16T06:15:00Z)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• Edge states in quantum spin chains: the interplay among interaction, gradient magnetic field and Floquet engineering [11.419243482331034]
  We explore the edge defects induced by spin-spin interaction in a finite paradigmatic Heisenberg spin chain. The interplay between these two types of edge defects allows us to manipulate the magnon edge states from an isolated band into a continuum one. Our study offers new insights to understand and control the magnon edge states governed by the interplay between edge defects induced by the spin-spin interaction and the Floquet-Wannier-Zeeman manipulation.
  arXiv  Detail & Related papers  (2020-11-12T02:17:22Z)
• Probing the coherence of solid-state qubits at avoided crossings [51.805457601192614]
  We study the quantum dynamics of paramagnetic defects interacting with a nuclear spin bath at avoided crossings. The proposed theoretical approach paves the way to designing the coherence properties of spin qubits from first principles.
  arXiv  Detail & Related papers  (2020-10-21T15:37:59Z)
• Non-equilibrium non-Markovian steady-states in open quantum many-body systems: Persistent oscillations in Heisenberg quantum spin chains [68.8204255655161]
  We investigate the effect of a non-Markovian, structured reservoir on an open Heisenberg spin chain. We establish a coherent self-feedback mechanism as the reservoir couples frequency-dependent to the spin chain.
  arXiv  Detail & Related papers  (2020-06-05T09:16:28Z)
• Long-range interaction in an open boundary-driven Heisenberg spin lattice: A far-from-equilibrium transition to ballistic transport [62.997667081978825]
  We study an open Heisenberg XXZ spin chain with long-range Ising-type interaction. We find that the chain lengths for this transition are increasing with decreasing range of the Ising-type interactions between distant spins. The transition can be explained by the suppression of ferromagnetic domains at the edges of the chain.
  arXiv  Detail & Related papers  (2020-04-27T12:22:50Z)
• Protecting Spin Coherence in a Tunable Heisenberg Model [0.0]
  We study a family of nonlocal Heisenberg Hamiltonians with tunable anisotropy of the spin-spin couplings. Images of the magnetization dynamics show that spin-exchange interactions protect the coherence of the collective spin.
  arXiv  Detail & Related papers  (2020-03-13T02:36:52Z)

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.