scholarly journals Ab initio determination of effective electron–phonon coupling factor in copper

2016 ◽  
Vol 380 (17) ◽  
pp. 1551-1555 ◽  
Author(s):  
Pengfei Ji ◽  
Yuwen Zhang
Keyword(s):  
Ab Initio ◽  
Coupling Factor ◽  
Phonon Coupling ◽  
Effective Electron ◽  
Electron Phonon Coupling

Ab Initio Study of the Electron–Phonon Coupling in Ultrathin Al Layers

2021 ◽  
Vol 203 (1-2) ◽  
pp. 180-193
Author(s):  
S. Giaremis ◽  
Ph. Komninou ◽  
Th. Karakostas ◽  
J. Kioseoglou
Keyword(s):  
Ab Initio ◽  
Ab Initio Study ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

scholarly journals Electron-Phonon Coupling Parameter of Ferromagnetic Metal Fe and Co

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2755
Author(s):  
Kyuhwe Kang ◽  
Gyung-Min Choi
Keyword(s):  
Coupling Parameter ◽  
Critical Role ◽  
Circuit Modeling ◽  
Metallic Materials ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Complicated Process ◽  
G Value ◽  
Non Equilibrium

The electron-phonon coupling (g) parameter plays a critical role in the ultrafast transport of heat, charge, and spin in metallic materials. However, the exact determination of the g parameter is challenging because of the complicated process during the non-equilibrium state. In this study, we investigate the g parameters of ferromagnetic 3d transition metal (FM) layers, Fe and Co, using time-domain thermoreflectance. We measure a transient increase in temperature of Au in an FM/Au bilayer; the Au layer efficiently detects the strong heat flow during the non-equilibrium between electrons and phonons in FM. The g parameter of the FM is determined by analyzing the temperature dynamics using thermal circuit modeling. The determined g values are 8.8–9.4 × 1017 W m−3 K−1 for Fe and 9.6–12.2 × 1017 W m−3 K−1 for Co. Our results demonstrate that all 3d transition FMs have a similar g value, in the order of 1018 W m−3 K−1.

scholarly journals Direct Determination of the Electron-Phonon Coupling Matrix Element in a Correlated System

2010 ◽  
Vol 105 (25) ◽  
Author(s):  
Huajun Qin ◽  
Junren Shi ◽  
Yanwei Cao ◽  
Kehui Wu ◽  
Jiandi Zhang ◽  
...  
Keyword(s):  
Matrix Element ◽  
Direct Determination ◽  
Phonon Coupling ◽  
Coupling Matrix ◽  
Electron Phonon Coupling

scholarly journals Determination of the electron–phonon coupling constant in tungsten

2014 ◽  
Vol 105 (2) ◽  
pp. 023112 ◽  
Author(s):  
Szymon L. Daraszewicz ◽  
Yvelin Giret ◽  
Hiroshi Tanimura ◽  
Dorothy M. Duffy ◽  
Alexander L. Shluger ◽  
...  
Keyword(s):  
Coupling Constant ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Influence of Inter- and Intraband Transitions to Electron Temperature Decay in Noble Metals After Short-Pulsed Laser Heating

2010 ◽  
Vol 132 (12) ◽  
Author(s):  
Patrick E. Hopkins
Keyword(s):  
Heat Capacity ◽  
Electron Temperature ◽  
Noble Metals ◽  
Coupling Factor ◽  
Phonon Coupling ◽  
Electron Heat Capacity ◽  
Temperature Decay ◽  
Electron Heat ◽  
Electron Phonon Coupling ◽  
Pulsed Laser Heating

This work examines the effects of photonically induced interband excitations from the d-band to states at the Fermi energy on the electron temperature decay in noble metals. The change in the electron population in the d-band and the conduction band causes a change in electron heat capacity and electron-phonon coupling factor. In noble metals, due to the large d-band to Fermi energy separation, the contributions to electron heat capacity and electron-phonon coupling factor of intra- and interband transitions can be separated. The two temperature model describing electron-phonon heat transfer after short-pulsed laser heating is solved using the expressions for heat capacity and electron-phonon coupling factor after intra- and interband excitations, and the predicted electron temperature change of the intra- and interband excited electrons are examined. A critical fluence value is defined that represents the absorbed fluence needed to fill all available states at a given photon energy above the Fermi level. At high absorbed laser fluences and pulse energies greater than the interband transition threshold, the interband and intraband contributions to thermophysical properties differ and are shown to affect temporal electron temperature profiles.

scholarly journals Optical Determination of Electron-Phonon Coupling in Carbon Nanotubes

2007 ◽  
Vol 98 (3) ◽  
Author(s):  
Y. Yin ◽  
A. N. Vamivakas ◽  
A. G. Walsh ◽  
S. B. Cronin ◽  
M. S. Ünlü ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Optical Determination

scholarly journals Ab initio study of electron-phonon coupling in rubrene

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
P. Ordejón ◽  
D. Boskovic ◽  
M. Panhans ◽  
F. Ortmann
Keyword(s):  
Ab Initio ◽  
Ab Initio Study ◽  
Phonon Coupling ◽  
Electron Phonon Coupling
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