Publication

Metastability of two-dimensional vortex glass in Bi2Sr2CaCu2O8+delta

László Forró, Helmuth Berger
2009
Journal Articles

Abstract

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.

Official source

https://infoscience.epfl.ch/entities/publication/deed01ea-99a0-4373-a270-4061213a5814

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László Forró, Helmuth Berger
2009
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/deed01ea-99a0-4373-a270-4061213a5814

About this result

Related concepts (8)

Phase transition

In chemistry, thermodynamics, and other related fields, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas, and in rare cases, plasma. A phase of a thermodynamic system and the states of matter have uniform physical properties. During a phase transition of a given medium, certain properties of the medium change as a result of the change of external conditions, such as temperature or pressure.

Phase (matter)

In the physical sciences, a phase is a region of material that is chemically uniform, physically distinct, and (often) mechanically separable. In a system consisting of ice and water in a glass jar, the ice cubes are one phase, the water is a second phase, and the humid air is a third phase over the ice and water. The glass of the jar is another separate phase. (See .) More precisely, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.

Phase diagram

A phase diagram in physical chemistry, engineering, mineralogy, and materials science is a type of chart used to show conditions (pressure, temperature, volume, etc.) at which thermodynamically distinct phases (such as solid, liquid or gaseous states) occur and coexist at equilibrium. Common components of a phase diagram are lines of equilibrium or phase boundaries, which refer to lines that mark conditions under which multiple phases can coexist at equilibrium. Phase transitions occur along lines of equilibrium.

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