scholarly journals Interplay between electron-phonon coupling and disorder strength on the transport properties of organic semiconductors

2012 ◽  
Vol 85 (15) ◽  
Author(s):  
C. A. Perroni ◽  
V. Cataudella
Keyword(s):  
Transport Properties ◽  
Organic Semiconductors ◽  
Disorder Strength ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Effect of Electron-Phonon Coupling on Transport Properties of Monolayers of ZrS2, BiI3 and PbI2: A thermoelectric Perspective

2021 ◽  
Author(s):  
Gautam Sharma ◽  
Vineet Kumar Pandey ◽  
Shouvik Datta ◽  
Prasenjit Ghosh
Keyword(s):  
Relaxation Time ◽  
Band Structure ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
Transport Coefficients ◽  
Electrical Energy ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Thermoelectric materials are used for conversion of waste heat to electrical energy. The transport coefficients that determine their thermoelectric properties depend on the band structure and the relaxation time of...

Influence of disorder strength on the superconducting mechanism of MgB2

2021 ◽  
Author(s):  
Jung Min Lee ◽  
Soon-Gil Jung ◽  
Younseok Han ◽  
Tae-Ho Park ◽  
Jae Kyung Jang ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Irradiation ◽  
Electronic System ◽  
Coupling Constants ◽  
Disorder Strength ◽  
Coupling Constant ◽  
Phonon Coupling ◽  
Normal State Resistivity ◽  
Electron Phonon Coupling ◽  
Effect Of Disorder

Abstract We investigate the effect of disorder on the superconducting mechanism of MgB2 thin films using low-energy ion irradiation. The c-axis lattice constant and T c of MgB2 thin films change systematically as the magnitude of disorder, which corresponds to the value of average displacements per atom (dpaavg ), increases. Here, dpaavg is controlled by the amount of irradiated ions. The dpaavg dependence of the electron-phonon coupling constants (λ) is estimated using the McMillan equation. For dpaavg ≤ 0.049, λ is linearly proportional to dpaavg . On the other hand, for dpaavg > 0.049, the T c of the disordered MgB2 deviates from the linear fitting curve, and insulating behavior is observed in the normal state resistivity. These results indicate that the superconducting mechanism of MgB2 can be changed by the electronic system caused by disorder strength affecting the electron-phonon coupling constant λ.

scholarly journals Efficient Calculation of Anisotropic Fermi Surface Problems through Helmholtz Fermi Surface Harmonics

Proceedings ◽  
2019 ◽  
Vol 26 (1) ◽  
pp. 36
Author(s):  
Lafuente-Bartolome ◽  
Gurtubay ◽  
Eiguren
Keyword(s):  
Fermi Surface ◽  
Transport Properties ◽  
Matrix Elements ◽  
Phonon Coupling ◽  
Efficient Calculation ◽  
Electron Phonon Coupling ◽  
The Matrix

In metals, the details of the Fermi surface and the magnitude of the matrix elements connecting different points defined on it determine most of their transport properties, which are limited by the electron-phonon coupling and the scattering by impurities. [...]

scholarly journals Symmetry effects on nonlocal electron-phonon coupling in organic semiconductors

2012 ◽  
Vol 85 (24) ◽  
Author(s):  
Yuan Li ◽  
Yuanping Yi ◽  
Veaceslav Coropceanu ◽  
Jean-Luc Brédas
Keyword(s):  
Organic Semiconductors ◽  
Phonon Coupling ◽  
Electron Phonon Coupling
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