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Signature of the matching field in Bose-glass melting of untwinned YBa_2Cu_3O_(7-δ) single crystals

Smith, A. W. and Jaeger, H. M. and Rosenbaum, T. F. and Kwok, W. K. and Crabtree, G. W. (1999) Signature of the matching field in Bose-glass melting of untwinned YBa_2Cu_3O_(7-δ) single crystals. Physical Review B, 59 (18). R11665-R11667. ISSN 1098-0121. doi:10.1103/PhysRevB.59.R11665.

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We map out the phase boundary separating the Bose-glass and vortex-liquid phases in an irradiated twin-free YBa_2Cu_3O_(7-δ) single crystal. We take the phase boundary to be the temperature T_g and magnetic field H at which the crystal begins to screen a small ac magnetic field, h_(ac). There is a significant change in slope dT_g/dH of the phase boundary at the matching field B_Φ (≃0.5 T) indicating that interstitial vortices significantly weaken pinning in the Bose-glass state. There is also a pronounced peak in the slope dT_g/dH just below B_Φ at higher h_(ac). Both features disappear when the field is tilted away from the columns.

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Alternate Title:Signature of the matching field in Bose-glass melting of untwinned YBa2Cu3O7-δ single crystals
Additional Information:© 1999 The American Physical Society. Received 29 December 1998. We are grateful to L. Radzihovsky for illuminating discussions. This work was supported by the National Science Foundation (Grant No. DMR91-20000) through the Science and Technology Center for Superconductivity. G.W.C. and W.K. acknowledge support from the U.S. Department of Energy, Basic Energy Sciences–Materials Science under Contract No W-31-109-ENG-38.
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Department of Energy (DOE)W-31-109-ENG-38
Issue or Number:18
Record Number:CaltechAUTHORS:20140707-163032049
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46976
Deposited By: George Porter
Deposited On:09 Jul 2014 21:01
Last Modified:10 Nov 2021 17:32

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