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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.

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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.

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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.
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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
Record Number:CaltechAUTHORS:20140707-163034445
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46995
Deposited By: George Porter
Deposited On:10 Jul 2014 22:05
Last Modified:10 Nov 2021 17:32

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