Temperature-induced momentum-dependent spectral weight transfer in Bi2Sr2CaCu2O8+delta |
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| Authors: | Z Shen PJ White DL Feng C Kim GD Gu H Ikeda R Yoshizaki N Koshizuka |
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| Institution: | Z.-X. Shen, P. J. White, D. L. Feng, C. Kim, Department of Applied Physics, Department of Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA. G. D. Gu, School of Physics, The University of New South. |
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| Abstract: | 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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