Field Induced Reduction of the Low-Temperature Superfluid Density in YBa{sub 2}Cu{sub 3}O{sub 6.95}

Journal Article · Mon Nov 15 04:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.4156· OSTI ID:20217960

Sonier, J E ^[1]; Brewer, J H ^[2]; Kiefl, R F ^[2]; Morris, G D ^[2]; Miller, R I ^[2]; Bonn, D A ^[3]; Chakhalian, J ^[2]; Heffner, R H ^[1]; Hardy, W N ^[3]; Liang, R ^[3]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. TRIUMF, Vancouver, British Columbia, Canada V6T 2A3 (Canada)
3. Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1 (Canada)

A novel high magnetic field (8 T) spectrometer for muon spin rotation has been used to measure the temperature dependence of the in-plane magnetic penetration depth {lambda}{sub ab} in YBa{sub 2}Cu {sub 3}O{sub 6.95} . At low H and low T , {lambda}{sub ab} exhibits the characteristic linear T dependence associated with the energy gap of a d{sub x{sup 2}-y{sup 2}}-wave superconductor. However, at higher fields {lambda}{sub ab} is essentially temperature independent at low T . We discuss possible interpretations of this surprising new feature in the low-energy excitation spectrum. (c) 1999 The American Physical Society.

• OSTI ID: 20217960
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
COPPER OXIDES
ENERGY GAP
EXPERIMENTAL DATA
HIGH-TC SUPERCONDUCTORS
MUON SPIN RELAXATION
PENETRATION DEPTH
SUPERFLUID MODEL
VORTICES
YTTRIUM OXIDES