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ARPES study of the superconducting gap and pseudogap in Bi2Sr2CaCu2O8+x

H. Ding·J. C. Campuzano·M. R. Norman·M. Randeria·T. Yokoya·T. Takahashi·T. Takeuchi·T. Mochiku·K. Kadowaki·P. Guptasarma·D. G. Hinks
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Abstract

In this paper, we review some of our ARPES results on the superconducting and pseudo gaps in Bi2Sr2CaCu2O8+x. We find that optimally and overdoped samples exhibit a d-wave gap, which closes at the same temperature, Tc, for all k points. In underdoped samples, a leading edge gap is found up to a temperature T* > Tc. We find that T* scales with the maximum low temperature gap, increasing as the doping is reduced. The momentum dependence of the pseudogap is similar to that of the superconducting gap; however, the pseudogap closes at different temperatures for different k points.

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H. Ding, J. C. Campuzano, M. R. Norman, M. Randeria, T. Yokoya, T. Takahashi, T. Takeuchi, T. Mochiku, K. Kadowaki, P. Guptasarma, D. G. Hinks. 1997-12-09. ARPES study of the superconducting gap and pseudogap in Bi2Sr2CaCu2O8+x. https://doi.org/10.1016/s0022-3697(98)00136-x

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