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Vortex Lock-In Deep in the Bose Glass

Beauchamp, K. M. and Rosenbaum, T. F. and Welp, U. and Crabtree, G. W. and Vinokur, V. M. (1995) Vortex Lock-In Deep in the Bose Glass. Physical Review Letters, 75 (21). pp. 3942-3945. ISSN 0031-9007. doi:10.1103/PhysRevLett.75.3942. https://resolver.caltech.edu/CaltechAUTHORS:20140707-163034445

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Abstract

We use a Bi gaussmeter of micron dimensions to explore the magnetic field dependence of the magnetization relaxation rate and the critical current down to millikelvin temperatures in untwinned single crystals of YBa_2Cu_3O_(7-δ) with columnar defects. The response separates into three regimes as a function of the ratio of vortex density to columnar defect density B/B_φ: enhancements in both critical current and quantum creep in the dilute limit, vanishing magnetization relaxation at the matching density (the proposed "Mott insulator'' phase line), and the emergence of temperature-dependent vortex motion for B≫B_φ.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.75.3942DOIArticle
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.75.3942PublisherArticle
Additional Information:© 1995 The American Physical Society. Received 17 August 1994. We are indebted to G. Seidler for his insightful suggestions and to L. Radzihovsky for enlightening discussions, and thank J. Hettinger for making possible the ion irradiation of our crystals. This work was supported by the National Science Foundation (DMR91-20000) through the Science and Technology Center for Superconductivity. G. W. C. acknowledges support from the U.S. Department of Energy, Basic Energy Sciences — Materials Science under Contract W-31-109-ENG-38.
Funders:
Funding AgencyGrant Number
NSFDMR91-20000
Department of Energy (DOE)W-31-109-ENG-38
Issue or Number:21
Classification Code:PACS numbers: 74.72.Bk, 74.25.Ha, 74.60.Ge, 74.60.Jg
DOI:10.1103/PhysRevLett.75.3942
Record Number:CaltechAUTHORS:20140707-163034445
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140707-163034445
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46995
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:10 Jul 2014 22:05
Last Modified:10 Nov 2021 17:32

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