Hofstadter spectra for d-orbital electrons: A case study on MoS2

Yen Hung Ho, Wu Pei Su, Min-Fa Lin

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

To study the Hofstadter spectrum of monolayer molybdenum disulfide (MoS2), we systematically examine the magnetic energy spectra due to various hoppings between d-orbital electrons to illustrate the link between the Bloch bands and the corresponding magnetoelectronic spectra. The magnetoelectronic spectrum shows a mirror (inversion) symmetry as a result of the particle-hole symmetry (asymmetry) in the Bloch bands. At small field, specific Landau fan diagrams can be ascribed to certain Bloch-band singularities. In the spectrum of real MoS2, we further find a breaking of spectral symmetry, the spin and valley polarization, and a flux-dependent energy gap. Our numerical results can facilitate a qualitative understanding of the topological nature of d-bands and provide a basis for exploring the Landau levels in transition-metal dichalcogenides.

Original languageEnglish
Pages (from-to)20858-20864
Number of pages7
JournalRSC Advances
Volume5
Issue number27
DOIs
Publication statusPublished - 2015 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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