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Direct observation of particle-hole mixing in the superconducting state by angle-resolved photoemission

J. C. Campuzano·H. Ding·M. R. Norman·M. Randeria·A. F. Bellman·T. Yokoya·T. Takahashi·H. Katayama-Yoshida·T. Mochiku·K. Kadowaki
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Abstract

Particle-hole (p-h) mixing is a fundamental consequence of the existence of a pair condensate. We present direct experimental evidence for p-h mixing in the angle-resolved photoemission (ARPES) spectra in the superconducting state of Bi_2Sr_2CaCu_2O_{8+δ}. In addition to its pedagogical importance, this establishes unambiguously that the gap observed in ARPES is associated with superconductivity.

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J. C. Campuzano, H. Ding, M. R. Norman, M. Randeria, A. F. Bellman, T. Yokoya, T. Takahashi, H. Katayama-Yoshida, T. Mochiku, K. Kadowaki. 1996-02-21. Direct observation of particle-hole mixing in the superconducting state by angle-resolved photoemission. https://doi.org/10.1103/physrevb.53.r14737

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