scholarly journals Anomalously high value of Coulomb pseudopotential for the H5S2 superconductor

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Małgorzata Kostrzewa ◽  
Radosław Szczęśniak ◽  
Joanna K. Kalaga ◽  
Izabela A. Wrona
Keyword(s):  
Coulomb Pseudopotential

A First-Principles Study of Electron-Phonon Coupling of OsB2

2014 ◽  
Vol 597 ◽  
pp. 113-116
Author(s):  
Yue Qin Wang ◽  
Juan Gao ◽  
Shao Ping Yan
Keyword(s):  
Transition Temperature ◽  
First Principles ◽  
Linear Response ◽  
Lattice Dynamics ◽  
Superhard Material ◽  
Superconducting Transition ◽  
Phonon Coupling ◽  
Phonon Modes ◽  
Electron Phonon Coupling ◽  
Coulomb Pseudopotential

We investigated the lattice dynamics and electron-phonon coupling (EPC) of superhard material OsB2by first-principles linear response calculations. The calculated EPC parameters for the optical phonon modes at Г indicate that the heavy Os atoms play the most important role in deciding the superconducting behavior, and there are sizeable contributions from lighter B atoms to EPC. Our calculated EPC constant is 0.42, and the estimated superconducting transition temperatureTcis 2.1 K using the Coulomb pseudopotentialμ*=0.125, in excellent agreement with the experimental ones.

scholarly journals Screening, Coulomb Pseudopotential, and Superconductivity in Alkali-Doped Fullerenes

1999 ◽  
Vol 83 (3) ◽  
pp. 620-623 ◽  
Author(s):  
Erik Koch ◽  
Olle Gunnarsson ◽  
Richard M. Martin
Keyword(s):  
Doped Fullerenes ◽  
Coulomb Pseudopotential
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