Evidence of Pseudogap Related Core Level Shifts in Bi{sub 2}Sr{sub 2}Ca{sub 1{minus}{ital x}}Y{sub {ital x}}Cu{sub 2}O{sub 8+{delta}}
Journal Article
·
· Physical Review Letters
- Materials Physics, Royal Institute of Technology, S-100 44 Stockholm (Sweden)
- Department of Synchrotron Radiation Research, Institute of Physics, Lund University, Box 118, S-221 00 Lund (Sweden)
- Department of Physics, Uppsala University, Box 530, S-75121 Uppsala (Sweden)
- Department of Geology, Moscow State University, 119 899 Moscow (Russian Federation)
- Department of Materials and Chemical Engineering, ABB Corporate Research, S-721 78 Vaesteras (Sweden)
Photoelectron spectroscopy data from Bi{sub 2}Sr{sub 2}Ca{sub 1{minus}x}Y{sub x}Cu{sub 2}O{sub 8+{delta}} single crystals, for x=0, 0.16, and 0.55, are presented. It is shown that there are core level shifts related to the opening of a pseudogap and that similar shifts are observed at the opening of the superconducting gap in optimally doped samples. This result is in agreement with pair formation above T{sub C} as suggested by V.J. Emery and S.A. Kivelson [Nature (London) {bold 374}, 434 (1995)]. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 548789
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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