First-principles verification of CuNNi3 and ZnNNi3 as phonon mediated superconductors

doi:10.1088/1674-1056/24/8/086301

中国物理B ›› 2015, Vol. 24 ›› Issue (8): 86301-086301.doi: 10.1088/1674-1056/24/8/086301

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

First-principles verification of CuNNi₃ and ZnNNi₃ as phonon mediated superconductors

陈建勇^a, 王星^b

a Faculty of Science, Guilin University of Aerospace Technology, Guilin 541004, China;
b Bowen College of Management, Guilin University of Technology, Guilin 541006, China

收稿日期:2014-12-09 修回日期:2015-03-30 出版日期:2015-08-05 发布日期:2015-08-05
基金资助:
Project supported by the Scientific Research Fund of Guilin University of Aerospace Technology, China (Grant No. YJ1410).

First-principles verification of CuNNi₃ and ZnNNi₃ as phonon mediated superconductors

Chen Jian-Yong (陈建勇)^a, Wang Xing (王星)^b

a Faculty of Science, Guilin University of Aerospace Technology, Guilin 541004, China;
b Bowen College of Management, Guilin University of Technology, Guilin 541006, China

Received:2014-12-09 Revised:2015-03-30 Online:2015-08-05 Published:2015-08-05
Contact: Chen Jian-Yong E-mail:glcjyong@guat.edu.cn
Supported by:
Project supported by the Scientific Research Fund of Guilin University of Aerospace Technology, China (Grant No. YJ1410).

摘要/Abstract

摘要： Very recently, a new Ni-based antiperovskite nitride superconductor CuNNi₃ has been successfully synthesized. We investigate the electronic structures, phonon dispersions, and electron–phonon interactions of CuNNi₃ and the isostructual ZnNNi₃ by first-principles approach. By analyzing the Eliashberg function we obtain the superconducting transition temperature T_c 3.16 K (3.53 K), which is in good agreement with corresponding experimental T_c 3.2 K (3 K) for CuNNi₃ (ZnNNi₃). They can be verified as conventional phonon-mediated superconductors.

关键词: transition temperature, Ni-based antiperovskite nitride, first-principles

Abstract: Very recently, a new Ni-based antiperovskite nitride superconductor CuNNi₃ has been successfully synthesized. We investigate the electronic structures, phonon dispersions, and electron–phonon interactions of CuNNi₃ and the isostructual ZnNNi₃ by first-principles approach. By analyzing the Eliashberg function we obtain the superconducting transition temperature T_c 3.16 K (3.53 K), which is in good agreement with corresponding experimental T_c 3.2 K (3 K) for CuNNi₃ (ZnNNi₃). They can be verified as conventional phonon-mediated superconductors.

Key words: transition temperature, Ni-based antiperovskite nitride, first-principles

中图分类号: (First-principles theory)

63.20.dk

63.20.kd (Phonon-electron interactions) 74.20.Fg (BCS theory and its development)

陈建勇, 王星. First-principles verification of CuNNi₃ and ZnNNi₃ as phonon mediated superconductors[J]. 中国物理B, 2015, 24(8): 86301-086301.

Chen Jian-Yong (陈建勇), Wang Xing (王星). First-principles verification of CuNNi₃ and ZnNNi₃ as phonon mediated superconductors[J]. Chin. Phys. B, 2015, 24(8): 86301-086301.

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First-principles verification of CuNNi₃ and ZnNNi₃ as phonon mediated superconductors

First-principles verification of CuNNi₃ and ZnNNi₃ as phonon mediated superconductors

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