Layered materials

Transition metal dichalcogenides are atomically thin two-dimensional layers with intriguing optical properties. The four famous ones with closely related properties are MoS2, MoSe2, WS2, and WSe2. Their monolayers show strong excitonic emission in the visible range (exciton binding energies ~500meV); their bulk forms are indirect-gap semiconductors. We are interested in their optical properties, including exciton-phonon coupling, and in their interactions in heterostructures with other layers.

Projekte

Publikationen

• Gillen R., Maultzsch J.:
  Interlayer excitons in MoSe2/WSe2 heterostructures from first principles
  In: Physical Review B 97 (2018)
  ISSN: 2469-9950
  DOI: 10.1103/PhysRevB.97.165306
• Gillen R., Maultzsch J.:
  Light-Matter Interactions in Two-Dimensional Transition Metal Dichalcogenides: Dominant Excitonic Transitions in Mono- and Few-Layer MoX2 and Band Nesting
  In: IEEE Journal of Selected Topics in Quantum Electronics 23 (2017)
  ISSN: 1077-260X
  DOI: 10.1109/JSTQE.2016.2604359
• Gibaja C., Miguel DR., Ares P., Gomez-Herrero J., Varela M., Gillen R., Maultzsch J., Hauke F., Hirsch A., Abellan Saez G., Zamora F.:
  Few-Layer Antimonene by Liquid-Phase Exfoliation
  In: Angewandte Chemie 128 (2016), S. 14557-14561
  ISSN: 0044-8249
  DOI: 10.1002/ange.201605298
• Tornatzky H., Gillen R., Uchiyama H., Maultzsch J.:
  Phonon dispersion of MoS2
  In: Physical Review B 99 (2019), S. 144309
  ISSN: 2469-9950
  DOI: 10.1103/PhysRevB.99.144309
  URL: https://arxiv.org/abs/1809.03381
• Wolff S., Gillen R., Assebban M., Abellan Saez G., Maultzsch J.:
  Two-Dimensional Antimony Oxide
  In: Physical Review Letters 124 (2020), S. 126101
  ISSN: 0031-9007
  DOI: 10.1103/PhysRevLett.124.126101