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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)2(MA)2Pb3l10

Author

  • Weiyan Qi
  • Stefano Ponzoni
  • Guénolé Huitric
  • Vitaly Gorelov
  • Ashim Pramanik
  • Yannis Laplace
  • Marino Marsi
  • Evangelos Papalazarou
  • Sebastian F. Maehrlein
  • Emmanuelle Deleporte
  • Nitin Mallik
  • Amina Taleb-Ibrahimi
  • Azzedine Bendounan
  • Kaibo Zheng
  • Tönu Pullerits
  • Luca Perfetti
Show all

Summary, in English

Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.

Department/s

  • Lund Laser Centre, LLC
  • LU Profile Area: Light and Materials
  • LTH Profile Area: Photon Science and Technology
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • Chemical Physics
  • NanoLund: Centre for Nanoscience
  • Department of Chemistry
  • eSSENCE: The e-Science Collaboration

Publishing year

2026

Language

English

Publication/Series

Small

Volume

22

Issue

17

Document type

Article

Publisher

John Wiley & Sons Inc.

Topic

  • Condensed Matter Physics (including Material Physics, Nano Physics)

Keywords

  • 2D perovskite
  • band structure
  • exciton
  • Rashba
  • self trapping

Status

Published

ISBN/ISSN/Other

  • ISSN: 1613-6810