Metastability of two-dimensional vortex glass in Bi2Sr2CaCu2O8+δ

被引：0

作者：

Pallinger, A. ^{[1
]}

Sas, B. ^{[1
]}

Kriza, G. ^{[1
]}

Vad, K. ^{[2
]}

Forro, L. ^{[3
]}

Berger, H. ^{[3
]}

Portier, F. ^{[4
]}

Williams, F. I. B. ^{[1
,4
]}

机构：

[1] Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

[2] Inst Nucl Res, H-4001 Debrecen, Hungary

[3] Ecole Polytech Fed Lausanne, Inst Phys Complex Matter, CH-1015 Lausanne, Switzerland

[4] Commissariat Energie Atom, Serv Phys Etat Condense, Direct Sci Matiere, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 02期

关键词：

bismuth compounds; calcium compounds; fluctuations in superconductors; flux-line lattice; high-temperature superconductors; magnetic moments; materials preparation; strontium compounds; superconducting thin films; superconducting transition temperature; PHASE-TRANSITIONS; MAGNETIC-FIELDS; SPIN-GLASS; SUPERCONDUCTORS; CROSSOVER; DISSIPATION; FREQUENCY; KRAMERS; STATE; LINE;

D O I：

10.1103/PhysRevB.80.024206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The decoupled layer quasi-two-dimensional glass phase of c-axis vortices in optimally doped Bi2Sr2CaCu2O8+delta (BSCCO) exhibits low-temperature metastability, the onset temperature of which is coincident with the peak in depinning current for zero-field-cooled sample preparation. We present experiments in strongly underdoped BSCCO showing similar metastability and develop a model for pinning dynamics where metastability results from progressive loss of thermal contact. The model accounts well for the field-temperature locus of the metastability and for the irreversibility and memory effects. We conclude that the metastability arises from a nonsingular dynamic crossover and does not mark a phase transition.

引用

页数：6

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