Anisotropic electron-phonon coupling on a two-dimensional circular Fermi contour

2009 ◽  
Vol 80 (24) ◽  
Author(s):  
TeYu Chien ◽  
Emile D. L. Rienks ◽  
Maria Fuglsang Jensen ◽  
Philip Hofmann ◽  
E. W. Plummer
Keyword(s):  
Two Dimensional ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Fermi Contour

scholarly journals Comment on “Electron-phonon coupling in two-dimensional silicene and germanene”

2017 ◽  
Vol 96 (4) ◽  
Author(s):  
M. E. Cifuentes-Quintal ◽  
O. de la Peña-Seaman ◽  
R. de Coss
Keyword(s):  
Two Dimensional ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Two-dimensional electronic spectroscopy of anharmonic molecular potentials

2018 ◽  
Vol 20 (3) ◽  
pp. 1642-1652 ◽  
Author(s):  
André Anda ◽  
Darius Abramavičius ◽  
Thorsten Hansen
Keyword(s):  
Electronic Spectroscopy ◽  
Two Dimensional ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Phonon Dynamics ◽  
Molecular Potentials

Two-dimensional electronic spectroscopy (2DES) is a powerful tool in the study of coupled electron–phonon dynamics, yet very little is known about how nonlinearities in the electron–phonon coupling, arising from anharmonicities in the nuclear potentials, affect the spectra.

scholarly journals Observation of the polaronic character of excitons in a two-dimensional semiconducting magnet CrI3

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Wencan Jin ◽  
Hyun Ho Kim ◽  
Zhipeng Ye ◽  
Gaihua Ye ◽  
Laura Rojas ◽  
...  
Keyword(s):  
Magnetic Semiconductors ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Two Dimensional ◽  
Phonon Coupling ◽  
Temperature Dependent ◽  
Strong Electron ◽  
Range Magnetic Order ◽  
Electron Phonon Coupling ◽  
Long Range Magnetic Order

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.

Multimode electron-phonon coupling in the two-dimensional t-J–Holstein model

1996 ◽  
Vol 34 (5) ◽  
pp. 367-372 ◽  
Author(s):  
D Poilblanc ◽  
T Sakai ◽  
D. J Scalapino ◽  
W Hanke
Keyword(s):  
Two Dimensional ◽  
Phonon Coupling ◽  
Holstein Model ◽  
Electron Phonon Coupling
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