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.

Contact Persons:

• Janina Maultzsch

Publications:

• Wolff S., Gillen R., Assebban M., Abellan Saez G., Maultzsch J.:
  Two-Dimensional Antimony Oxide
  In: Physical Review Letters 124 (2020), p. 126101
  ISSN: 0031-9007
  DOI: 10.1103/PhysRevLett.124.126101
• Tornatzky H., Gillen R., Uchiyama H., Maultzsch J.:
  Phonon dispersion of MoS2
  In: Physical Review B 99 (2019), p. 144309
  ISSN: 2469-9950
  DOI: 10.1103/PhysRevB.99.144309
  URL: https://arxiv.org/abs/1809.03381
• 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