Field induced reduction of the low-temperature superfluid density in YBa2Cu3O6.95

Authors
Sonier, JE Brewer, JH Kiefl, RF Morris, GD Miller, RI Bonn, DA Chakhalian, J Heffner, RH Hardy, WN Liang, R
Citation
Je. Sonier et al., Field induced reduction of the low-temperature superfluid density in YBa2Cu3O6.95, PHYS REV L, 83(20), 1999, pp. 4156-4159
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
20
Year of publication
1999
Pages
4156 - 4159
Database
ISI
SICI code
0031-9007(19991115)83:20<4156:FIROTL>2.0.ZU;2-N
Abstract
A novel high magnetic held (8 T) spectrometer for muon spin relation has be en used to measure the temperature dependence of the in-plane magnetic pene tration depth lambda(ab) in YBa2Cu3O6.95. At low H and low T, lambda(ab) ex hibits the characteristic linear T dependence associated with the energy ga p of a d(x2-y2)-wave superconductor. However, at higher fields lambda(ab) i s essentially temperature independent at low T. We discuss possible interpr etations of this surprising new feature in the low-energy excitation spectr um.