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Temperature-Induced Momentum-Dependent Spectral Weight Transfer in Bi <sub>2</sub> Sr <sub>2</sub> CaCu <sub>2</sub> O <sub>8+δ</sub>
69
Citations
10
References
1998
Year
Superconducting MaterialEngineeringExcitation Energy TransferTransition Temperature TcSuperconductivityQuantum MaterialsHigh Tc SuperconductorsThermodynamicsSuperconducting DevicesHigh-tc SuperconductivityPhysicsPhysical ChemistryQuantum ChemistrySolid-state PhysicAb-initio MethodNatural SciencesCondensed Matter PhysicsApplied PhysicsAngle-resolved Photoemission DataCuprate Superconductor Bi2sr2cacu2o8+delta
Angle-resolved photoemission data from the cuprate superconductor Bi2Sr2CaCu2O8+delta above and below the superconducting transition temperature Tc reveal momentum-dependent changes that extend up to an energy of about 0.3 electron volt, or 40kTc (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 approximately (0.45pi, 0). The observed Q is intriguingly near the charge-order periodicity required if fluctuating charge stripes are present.
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