Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor
Abstract
The unclear relationship between cuprate superconductivity and the pseudogap state remains an impediment to understanding the high transition temperature (Tc) superconducting mechanism. Here we employ magnetic-field-dependent scanning tunneling microscopy to provide phase-sensitive proof that d-wave superconductivity coexists with the pseudogap on the antinodal Fermi surface of an overdoped cuprate. Furthermore, by tracking the hole doping (p) dependence of the quasiparticle interference pattern within a single Bi-based cuprate family, we observe a Fermi surface reconstruction slightly below optimal doping, indicating a zero-field quantum phase transition in notable proximity to the maximum superconducting Tc. Surprisingly, this major reorganization of the system's underlying electronic structure has no effect on the smoothly evolving pseudogap.
Cite
@article{arxiv.1305.2778,
title = {Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor},
author = {Yang He and Yi Yin and M. Zech and Anjan Soumyanarayanan and Michael M. Yee and Tess Williams and M. C. Boyer and Kamalesh Chatterjee and W. D. Wise and I. Zeljkovic and Takeshi Kondo and T. Takeuchi and H. Ikuta and Peter Mistark and Robert S. Markiewicz and Arun Bansil and Subir Sachdev and E. W. Hudson and Jennifer. E. Hoffman},
journal= {arXiv preprint arXiv:1305.2778},
year = {2014}
}
Comments
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