Your browser doesn't support javascript.
loading
Observation of the polaronic character of excitons in a two-dimensional semiconducting magnet CrI3.
Jin, Wencan; Kim, Hyun Ho; Ye, Zhipeng; Ye, Gaihua; Rojas, Laura; Luo, Xiangpeng; Yang, Bowen; Yin, Fangzhou; Horng, Jason Shih An; Tian, Shangjie; Fu, Yang; Xu, Gongjun; Deng, Hui; Lei, Hechang; Tsen, Adam W; Sun, Kai; He, Rui; Zhao, Liuyan.
Afiliación
  • Jin W; Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI, 48109, USA.
  • Kim HH; Department of Physics, Auburn University, 380 Duncan Drive, Auburn, AL, 36849, USA.
  • Ye Z; Institute for Quantum Computing, Department of Chemistry, and Department of Physics and Astronomy, University of Waterloo, Waterloo, 200 University Ave W, Ontario, N2L 3G1, Canada.
  • Ye G; School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk, 39177, Korea.
  • Rojas L; Department of Electrical and Computer Engineering, 910 Boston Avenue, Texas Tech University, Lubbock, TX, 79409, USA.
  • Luo X; Department of Electrical and Computer Engineering, 910 Boston Avenue, Texas Tech University, Lubbock, TX, 79409, USA.
  • Yang B; Department of Electrical and Computer Engineering, 910 Boston Avenue, Texas Tech University, Lubbock, TX, 79409, USA.
  • Yin F; Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI, 48109, USA.
  • Horng JSA; Institute for Quantum Computing, Department of Chemistry, and Department of Physics and Astronomy, University of Waterloo, Waterloo, 200 University Ave W, Ontario, N2L 3G1, Canada.
  • Tian S; Institute for Quantum Computing, Department of Chemistry, and Department of Physics and Astronomy, University of Waterloo, Waterloo, 200 University Ave W, Ontario, N2L 3G1, Canada.
  • Fu Y; Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI, 48109, USA.
  • Xu G; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China.
  • Deng H; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China.
  • Lei H; Department of Statistics, University of Michigan, 1085 South University, Ann Arbor, MI, 48109, USA.
  • Tsen AW; Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI, 48109, USA.
  • Sun K; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing, 100872, China.
  • He R; Institute for Quantum Computing, Department of Chemistry, and Department of Physics and Astronomy, University of Waterloo, Waterloo, 200 University Ave W, Ontario, N2L 3G1, Canada.
  • Zhao L; Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI, 48109, USA.
Nat Commun ; 11(1): 4780, 2020 Sep 22.
Article en En | MEDLINE | ID: mdl-32963250
ABSTRACT
Exciton dynamics can be strongly affected by lattice vibrations through electron-phonon coupling. This is rarely explored in two-dimensional magnetic semiconductors. Focusing on bilayer CrI3, we first show the presence of strong electron-phonon coupling through temperature-dependent photoluminescence and absorption spectroscopy. We then report the observation of periodic broad modes up to the 8th order in Raman spectra, attributed to the polaronic character of excitons. We establish that this polaronic character is dominated by the coupling between the charge-transfer exciton at 1.96 eV and a longitudinal optical phonon at 120.6 cm-1. We further show that the emergence of long-range magnetic order enhances the electron-phonon coupling strength by ~50% and that the transition from layered antiferromagnetic to ferromagnetic order tunes the spectral intensity of the periodic broad modes, suggesting a strong coupling among the lattice, charge and spin in two-dimensional CrI3. Our study opens opportunities for tailoring light-matter interactions in two-dimensional magnetic semiconductors.
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article