Boundary Effect and Critical Temperature of Two-Band Superconducting FeSe Films

被引：0

作者：

Ye, Chenxiao ^{[1
]}

Che, Jiantao ^{[2
]}

Huang, Hai ^{[2
]}

机构：

[1] North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China

[2] North China Elect Power Univ, Dept Math & Phys, Beijing 102206, Peoples R China

来源：

CRYSTALS | 2023年 / 13卷 / 01期

关键词：

two-band superconductor; boundary term; critical temperature; FeSe film; GINZBURG-LANDAU EQUATIONS; UPPER CRITICAL-FIELD;

D O I：

10.3390/cryst13010018

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Based on two-band Bogoliubov-de Gennes theory, we study the boundary effect of an interface between a two-gap superconductor FeSe and insulator (or vacuum). New boundary terms are introduced into two-band Ginzburg-Landau formalism, which modifies the boundary conditions for the corresponding order parameters of superconductor. The theory allows for a mean-field calculation of the critical temperature suppression with the decrease in FeSe film thickness. Our numerical results are in good agreement with the experimental data observed in this material.

引用

页数：9

共 48 条

[1] ZFC process in 2+1 and 3+1 multi-band superconductor [J].

Aguirre, C. ;

de Arruda, A. S. ;

Faundez, J. ;

Barba-Ortega, J. .

PHYSICA B-CONDENSED MATTER, 2021, 615

[2] Vortices in a superconducting two-band disk: Role of the Josephson and bi-quadratic coupling [J].

Aguirre, C. A. ;

Martins, Q. D. ;

Barba-Ortega, J. .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2021, 581

[3] Boundary effects in two-band superconductors [J].

Benfenati, Andrea ;

Samoilenka, Albert ;

Babaev, Egor .

PHYSICAL REVIEW B, 2021, 103 (14)

[4] Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe [J].

Bohmer, A. E. ;

Taufour, V. ;

Straszheim, W. E. ;

Wolf, T. ;

Canfield, P. C. .

PHYSICAL REVIEW B, 2016, 94 (02)

[5] Single crystal growth and characterization of tetragonal FeSe1-x superconductors [J].

Chareev, Dmitriy ;

Osadchii, Evgeniy ;

Kuzmicheva, Tatiana ;

Lin, Jiunn-Yuan ;

Kuzmichev, Svetoslav ;

Volkova, Olga ;

Vasiliev, Alexander .

CRYSTENGCOMM, 2013, 15 (10) :1989-1993

[6] Jahn-Teller effect in the Nb planar atomic sheet [J].

Chen Lu-Zhuo ;

Wang Xiao-Chun ;

Wen Yu-Hua ;

Zhu Zi-Zhong .

ACTA PHYSICA SINICA, 2007, 56 (05) :2920-2925

[7] Low-temperature fabrication of superconducting FeSe thin films by pulsed laser deposition [J].

Chen, Ta-Kun ;

Luo, Jiu-Yong ;

Ke, Chung-Ting ;

Chang, Hsian-Hong ;

Huang, Tzu-Wen ;

Yeh, Kuo-Wei ;

Chang, Chung-Chieh ;

Hsu, Po-Chun ;

Wu, Chun-Te ;

Wang, Ming-Jye ;

Wu, Mau-Kuen .

THIN SOLID FILMS, 2010, 519 (05) :1540-1545

[8] Interplay of Fermi velocities and healing lengths in two-band superconductors [J].

Chen, Yajiang ;

Zhu, Haiping ;

Shanenko, A. A. .

PHYSICAL REVIEW B, 2020, 101 (21)

[9] Anisotropy of the upper critical field in MgB2:: the two-gap Ginzburg-Landau theory [J].

Dao, VH ;

Zhitomirsky, ME .

EUROPEAN PHYSICAL JOURNAL B, 2005, 44 (02) :183-188

[10]

de Gennes P-G, 1966, SUPERCONDUCTIVITY ME

← 1 2 3 4 5 →