Transition from activated to diffusive behavior in the vortex-liquid state in YBa2Cu3O7

T. R. Chien; T. W. Jing; N. P. Ong; Z. Z. Wang

doi:10.1016/0921-4534(91)91021-U

Transition from activated to diffusive behavior in the vortex-liquid state in YBa₂Cu₃O₇

T. R. Chien, T. W. Jing, N. P. Ong, Z. Z. Wang

Research output: Contribution to journal › Article › peer-review

Abstract

In the vortex-liquid state in YBa₂Cu₃O₇, there exist two distinct dissipative states separated by a field H>_k. Below H_k, the resistivity is strongly field-activated, with a prefactor that is anomalously enhanced over the normal-state resistivity ρ{variant}_N by ≈12 orders of magnitude. At H_k, the prefactor collapses to a temperature-independent value equal to ρ{variant}_N, and the vortex motion becomes diffusive. The existence of the H_k boundary is also reflected in the anomalous behavior of the Hall resistivity.

Original language	English (US)
Pages (from-to)	1791-1792
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	185-189
Issue number	PART 3
DOIs	https://doi.org/10.1016/0921-4534(91)91021-U
State	Published - Dec 1 1991

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(91)91021-U

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title = "Transition from activated to diffusive behavior in the vortex-liquid state in YBa2Cu3O7",

abstract = "In the vortex-liquid state in YBa2Cu3O7, there exist two distinct dissipative states separated by a field H>k. Below Hk, the resistivity is strongly field-activated, with a prefactor that is anomalously enhanced over the normal-state resistivity ρ{variant}N by ≈12 orders of magnitude. At Hk, the prefactor collapses to a temperature-independent value equal to ρ{variant}N, and the vortex motion becomes diffusive. The existence of the Hk boundary is also reflected in the anomalous behavior of the Hall resistivity.",

author = "Chien, {T. R.} and Jing, {T. W.} and Ong, {N. P.} and Wang, {Z. Z.}",

note = "Funding Information: sr~tllme~ ht ~Th~ /di mk~ ~ m ~h°:cUe olla pb°Vs oefH k {"}(p~fa{"}lsc t 2 0o {"} constant close to pro, suggest the picture of weakly interacting vorticesdiffusing in a disordered poten'tial with average barrier heights smaller than kBT. We remark that nowhere in Fig. 2 is conventional Bardeen-Stephen type flux flow observed. The research is supported by the U.S. Defense Advanced Research Projects Agency by a sub-contract (MDA972-90-J-1001) through the Texas Center for Superconductivity, the Seaver Institute, and the U.S. Office of Naval Research (Contract N00014-90-J-1013) Some measurements were performed at the National Magnet Laboratory, Cambridge.",

year = "1991",

month = dec,

day = "1",

doi = "10.1016/0921-4534(91)91021-U",

language = "English (US)",

volume = "185-189",

pages = "1791--1792",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "PART 3",

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TY - JOUR

T1 - Transition from activated to diffusive behavior in the vortex-liquid state in YBa2Cu3O7

AU - Chien, T. R.

AU - Jing, T. W.

AU - Ong, N. P.

AU - Wang, Z. Z.

N1 - Funding Information: sr~tllme~ ht ~Th~ /di mk~ ~ m ~h°:cUe olla pb°Vs oefH k "(p~fa"lsc t 2 0o " constant close to pro, suggest the picture of weakly interacting vorticesdiffusing in a disordered poten'tial with average barrier heights smaller than kBT. We remark that nowhere in Fig. 2 is conventional Bardeen-Stephen type flux flow observed. The research is supported by the U.S. Defense Advanced Research Projects Agency by a sub-contract (MDA972-90-J-1001) through the Texas Center for Superconductivity, the Seaver Institute, and the U.S. Office of Naval Research (Contract N00014-90-J-1013) Some measurements were performed at the National Magnet Laboratory, Cambridge.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - In the vortex-liquid state in YBa2Cu3O7, there exist two distinct dissipative states separated by a field H>k. Below Hk, the resistivity is strongly field-activated, with a prefactor that is anomalously enhanced over the normal-state resistivity ρ{variant}N by ≈12 orders of magnitude. At Hk, the prefactor collapses to a temperature-independent value equal to ρ{variant}N, and the vortex motion becomes diffusive. The existence of the Hk boundary is also reflected in the anomalous behavior of the Hall resistivity.

AB - In the vortex-liquid state in YBa2Cu3O7, there exist two distinct dissipative states separated by a field H>k. Below Hk, the resistivity is strongly field-activated, with a prefactor that is anomalously enhanced over the normal-state resistivity ρ{variant}N by ≈12 orders of magnitude. At Hk, the prefactor collapses to a temperature-independent value equal to ρ{variant}N, and the vortex motion becomes diffusive. The existence of the Hk boundary is also reflected in the anomalous behavior of the Hall resistivity.

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VL - 185-189

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JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - PART 3

ER -

Transition from activated to diffusive behavior in the vortex-liquid state in YBa₂Cu₃O₇

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