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Phase competition in trisected superconducting dome.

Abstract：

:A detailed phenomenology of low energy excitations is a crucial starting point for microscopic understanding of complex materials, such as the cuprate high-temperature superconductors. Because of its unique momentum-space discrimination, angle-resolved photoemission spectroscopy (ARPES) is ideally suited for this task in the cuprates, where emergent phases, particularly superconductivity and the pseudogap, have anisotropic gap structure in momentum space. We present a comprehensive doping- and temperature-dependence ARPES study of spectral gaps in Bi(2)Sr(2)CaCu(2)O(8+δ), covering much of the superconducting portion of the phase diagram. In the ground state, abrupt changes in near-nodal gap phenomenology give spectroscopic evidence for two potential quantum critical points, p = 0.19 for the pseudogap phase and p = 0.076 for another competing phase. Temperature dependence reveals that the pseudogap is not static below T(c) and exists p > 0.19 at higher temperatures. Our data imply a revised phase diagram that reconciles conflicting reports about the endpoint of the pseudogap in the literature, incorporates phase competition between the superconducting gap and pseudogap, and highlights distinct physics at the edge of the superconducting dome.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Vishik IM,Hashimoto M,He RH,Lee WS,Schmitt F,Lu D,Moore RG,Zhang C,Meevasana W,Sasagawa T,Uchida S,Fujita K,Ishida S,Ishikado M,Yoshida Y,Eisaki H,Hussain Z,Devereaux TP,Shen ZX

doi

10.1073/pnas.1209471109

subject

Has Abstract

pub_date

2012-11-06 00:00:00

pages

18332-7

issue

45

eissn

0027-8424

issn

1091-6490

pii

1209471109

journal_volume

109

pub_type

杂志文章

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