Probing the Band Splitting near the Γ Point in the van der Waals Magnetic Semiconductor CrSBr

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Kaiman Lin - , University of Michigan-Shanghai Jiao Tong University Joint Institute, Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Yi Li - , Professur für Spektroskopie in der Halbleiterphysik (gB/HZDR), Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Mahdi Ghorbani-Asl - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Zdenek Sofer - , University of Chemistry and Technology, Prague (Autor:in)
  • Stephan Winnerl - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Artur Erbe - , Institut für Halbleiter- und Mikrosystemtechnik (IHM), Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Arkady V. Krasheninnikov - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Manfred Helm - , Professur für Spektroskopie in der Halbleiterphysik (gB/HZDR), Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Shengqiang Zhou - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • Yaping Dan - , University of Michigan-Shanghai Jiao Tong University Joint Institute (Autor:in)
  • Slawomir Prucnal - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)

Abstract

This study investigates the electronic band structure of chromium sulfur bromide (CrSBr) through comprehensive photoluminescence (PL) characterization. We clearly identify low-temperature optical transitions between two closely adjacent conduction-band states and two different valence-band states. The analysis on the PL data robustly unveils energy splittings, band gaps, and excitonic transitions across different thicknesses of CrSBr, from monolayer to bulk. Temperature-dependent PL measurements elucidate the stability of the band splitting below the Néel temperature, suggesting that magnons coupled with excitons are responsible for the symmetry breaking and brightening of the transitions from the secondary conduction band minimum (CBM2) to the global valence band maximum (VBM1). Collectively, these results not only reveal splitting in both the conduction and valence bands but also highlight a significant advance in our understanding of the interplay between the optical, electronic, and magnetic properties of antiferromagnetic two-dimensional van der Waals crystals.

Details

OriginalspracheEnglisch
Seiten (von - bis)6010-6016
Seitenumfang7
FachzeitschriftJournal of Physical Chemistry Letters
Jahrgang15
Ausgabenummer23
PublikationsstatusVeröffentlicht - 13 Juni 2024
Peer-Review-StatusJa

Externe IDs

PubMed 38814350