Two-step melting of the vortex solid in layered superconductors with random columnar pins

被引：29

作者：

Dasgupta, C ^{[1
]}

Valls, OT

机构：

[1] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA

[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[3] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA

[4] Univ Minnesota, Minnesota Supercomp Inst, Minneapolis, MN 55455 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.91.127002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the melting of the vortex solid in highly anisotropic layered superconductors with a small concentration of random columnar pinning centers. Using large-scale numerical minimization of a free-energy functional, we find that melting of the low-temperature, nearly crystalline vortex solid (Bragg glass) into a vortex liquid occurs in two steps as the temperature increases: the Bragg glass and liquid phases are separated by an intermediate Bose glass phase. A suitably defined local melting temperature exhibits spatial variation similar to that observed in experiments.

引用

页码：127002 / 127002

页数：4

共 19 条

[1] Melting of "porous" vortex matter [J].

Banerjee, SS ;

Soibel, A ;

Myasoedov, Y ;

Rappaport, M ;

Zeldov, E ;

Menghini, M ;

Fasano, Y ;

de la Cruz, F ;

van der Beek, CJ ;

Konczykowski, M ;

Tamegai, T .

PHYSICAL REVIEW LETTERS, 2003, 90 (08) :4

[2] Disordered type-II superconductors:: a universal phase diagram for low-Tc systems [J].

Banerjee, SS ;

Grover, AK ;

Higgins, MJ ;

Menon, GI ;

Mishra, PK ;

Pal, D ;

Ramakrishnan, S ;

Rao, TVC ;

Ravikumar, G ;

Sahni, VC ;

Sarkar, S ;

Tomy, CV .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2001, 355 (1-2) :39-50

[3] ORIENTATIONAL AND POSITIONAL ORDER IN FLUX LATTICES OF TYPE-II SUPERCONDUCTORS [J].

CHUDNOVSKY, EM .

PHYSICAL REVIEW B, 1991, 43 (10) :7831-7836

[4] Vortices in layered superconductors with columnar pins: A density-functional study [J].

Dasgupta, C ;

Valls, OT .

PHYSICAL REVIEW B, 2002, 66 (06) :645181-6451814

[5] Vortex lattice melting in layered superconductors with periodic columnar pins [J].

Dasgupta, C ;

Valls, OT .

PHYSICAL REVIEW LETTERS, 2001, 87 (25) :257002-1

[6]

DASGUPTA C, IN PRESS

[7] ELASTIC THEORY OF FLUX LATTICES IN THE PRESENCE OF WEAK DISORDER [J].

GIAMARCHI, T ;

LEDOUSSAL, P .

PHYSICAL REVIEW B, 1995, 52 (02) :1242-1270

[8] A Bragg glass phase in the vortex lattice of a type II superconductor [J].

Klein, T ;

Joumard, I ;

Blanchard, S ;

Marcus, J ;

Cubitt, R ;

Giamarchi, T ;

Le Doussal, P .

NATURE, 2001, 413 (6854) :404-406

[9] First-order phase transition from the vortex liquid to an amorphous solid [J].

Menghini, M ;

Fasano, Y ;

de la Cruz, F ;

Banerjee, SS ;

Myasoedov, Y ;

Zeldov, E ;

van der Beek, CJ ;

Konczykowski, M ;

Tamegai, T .

PHYSICAL REVIEW LETTERS, 2003, 90 (14) :4

[10] Phase behavior of type-II superconductors with quenched point pinning disorder: A phenomenological proposal [J].

Menon, GI .

PHYSICAL REVIEW B, 2002, 65 (10) :1-23

← 1 2 →