Temperature-Induced Momentum-Dependent Spectral Weight Transfer in Bi 2 Sr 2 CaCu 2 O 8+δ
- 10 April 1998
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 280 (5361) , 259-262
- https://doi.org/10.1126/science.280.5361.259
Abstract
Angle-resolved photoemission data from the cuprate superconductor Bi 2 Sr 2 CaCu 2 O 8+δ above and below the superconducting transition temperature T c reveal momentum-dependent changes that extend up to an energy of about 0.3 electron volt, or 40 kT c (where k is the Boltzmann constant). The data suggest an anomalous transfer of spectral weight from one momentum to another, involving a sizable momentum transfer Q ∼ (0.45π, 0). The observed Q is intriguingly near the charge-order periodicity required if fluctuating charge stripes are present.Keywords
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