Superconductivity in Diamond-like BC<sub>3</sub> Phase

Authors

  • M. M. Ali Physics Department, Rajshahi University
  • A.K.M. A. Islam Rajshahi University
  • M. Aftabuzzaman Physics Department, Rajshahi University
  • F. Parvin Physics Department

DOI:

https://doi.org/10.3329/jsr.v2i2.2638

Keywords:

Superhard BC3, Band structure, Phonon spectra, Superconductivity.

Abstract

Two possible phases of superhard material BC3 originating from the cubic diamond structure are investigated by ab initio pseudopotential density functional method using generalized gradient approximation (GGA). We calculate their elastic constants, electronic band structure, and density of states (DOS). Full phonon frequencies, electron-phonon coupling constant and possible superconducting Tc of the metallic phase with tetragonal symmetry (t-BC3, space group P-42m) have for the first time been investigated at 5 and 10 GPa. The calculated electron-phonon coupling (0.67) and the logarithmically-averaged frequency (862 cm-1) show superconductivity for the undoped t-BC3 with Tc = 20 K at 5 GPa, which decreases to 17.5 K at 10 GPa.

 

Keywords: Superhard BC3; Band structure; Phonon spectra; Superconductivity.

 

© 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.

DOI: 10.3329/jsr.v2i2.2638               J. Sci. Res. 2 (2), 203-213 (2010)

 

 

 

 

 

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Author Biographies

M. M. Ali, Physics Department, Rajshahi University

Research Student

Condensed Matter Physics Lab

Rajshahi University

A.K.M. A. Islam, Rajshahi University

Professor of Physics

Rajshahi University

 

M. Aftabuzzaman, Physics Department, Rajshahi University

Research Student

Condensed Matter Physics Lab

Rajshahi University

F. Parvin, Physics Department

Assistant Professor

Physics Department

Rajshahi University

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Published

2010-04-24

How to Cite

Ali, M. M., Islam, A. A., Aftabuzzaman, M., & Parvin, F. (2010). Superconductivity in Diamond-like BC<sub>3</sub> Phase. Journal of Scientific Research, 2(2), 203–213. https://doi.org/10.3329/jsr.v2i2.2638

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Section

Section A: Physical and Mathematical Sciences