Equilibrium first-order melting and second-order glass transitions of the vortex matter in Bi2Sr2CaCu2O8 -: art. no. 257004

被引：73

作者：

Beidenkopf, H ^{[1
]}

Avraham, N

Myasoedov, Y

Shtrikman, H

Zeldov, E

Rosenstein, B

Brandt, EH

Tamegai, T

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

[2] Natl Chiao Tung Univ, Natl Ctr Theoret Sci, Hsinchu 30050, Taiwan

[3] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30050, Taiwan

[4] Max Planck Inst Met Res, D-70506 Stuttgart, Germany

[5] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.95.257004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thermodynamic H-T phase diagram of Bi2Sr2CaCu2O8 was mapped by measuring local equilibrium magnetization M(H,T) in the presence of vortex shaking. Two equally sharp first-order magnetization steps are revealed in a single temperature sweep, manifesting a liquid-solid-liquid sequence. In addition, a second-order glass transition line is revealed by a sharp break in the equilibrium M(T) slope. The first- and second-order lines intersect at intermediate temperatures, suggesting the existence of four phases: Bragg glass and vortex crystal at low fields, glass and liquid at higher fields.

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