Superconductivity in MgB2:: Clean or dirty? -: art. no. 107002

被引：340

作者：

Mazin, II ^{[1
]}

Andersen, OK

Jepsen, O

Dolgov, OV

Kortus, J

Golubov, AA

Kuz'menko, AB

van der Marel, D

机构：

[1] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[3] Univ Twente, Dept Appl Phys, NL-7500 AE Enschede, Netherlands

[4] Univ Groningen, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.89.107002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A large number of experimental facts and theoretical arguments favor a two-gap model for superconductivity in MgB2. However, this model predicts strong suppression of the critical temperature by interband impurity scattering and, presumably, a strong correlation between the critical temperature and the residual resistivity. No such correlation has been observed. We argue that this fact can be understood if the band disparity of the electronic structure is taken into account, not only in the superconducting state, but also in normal transport.

引用

页码：107002 / 107002

页数：4

共 25 条

[1] FERMI-SURFACE HARMONICS - GENERAL METHOD FOR NONSPHERICAL PROBLEMS - APPLICATION TO BOLTZMANN AND ELIASHBERG EQUATIONS [J].

ALLEN, PB .

PHYSICAL REVIEW B, 1976, 13 (04) :1416-1427

[2] ELECTRON-PHONON EFFECTS IN INFRARED PROPERTIES OF METALS [J].

ALLEN, PB .

PHYSICAL REVIEW B, 1971, 3 (02) :305-&

[3] Multiband model for tunneling in MgB2 junctions -: art. no. 180517 [J].

Brinkman, A ;

Golubov, AA ;

Rogalla, H ;

Dolgov, OV ;

Kortus, J ;

Kong, Y ;

Jepsen, O ;

Andersen, OK .

PHYSICAL REVIEW B, 2002, 65 (18) :1805171-1805174

[4] Review of the superconducting properties of MgB2 [J].

Buzea, C ;

Yamashita, T .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2001, 14 (11) :R115-R146

[5] Superconductivity in dense MgB2 wires [J].

Canfield, PC ;

Finnemore, DK ;

Bud'ko, SL ;

Ostenson, JE ;

Lapertot, G ;

Cunningham, CE ;

Petrovic, C .

PHYSICAL REVIEW LETTERS, 2001, 86 (11) :2423-2426

[6] First-principles calculation of the superconducting transition in MgB2 within the anisotropic Eliashberg formalism -: art. no. 020513 [J].

Choi, HJ ;

Roundy, D ;

Sun, H ;

Cohen, ML ;

Louie, SG .

PHYSICAL REVIEW B, 2002, 66 (02) :1-4

[7]

CHOI HJ, CONDMAT0111183

[8] Transport and inductive critical current densities in superconducting MgB2 [J].

Dhallé, M ;

Toulemonde, P ;

Beneduce, C ;

Musolino, N ;

Decroux, M ;

Flükiger, R .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2001, 363 (03) :155-165

[9] Effect of magnetic and nonmagnetic impurities on highly anisotropic superconductivity [J].

Golubov, AA ;

Mazin, II .

PHYSICAL REVIEW B, 1997, 55 (22) :15146-15152

[10] Specific heat of MgB2 in a one- and a two-band model from first-principles calculations [J].

Golubov, AA ;

Kortus, J ;

Dolgov, OV ;

Jepsen, O ;

Kong, Y ;

Andersen, OK ;

Gibson, BJ ;

Ahn, K ;

Kremer, RK .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (06) :1353-1360

← 1 2 3 →