Статья

Phase competition in trisected superconducting dome

Inna VishikGeballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305;Makoto HashimotoStanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025;Ruihua HeDepartment of Physics, Boston College, Chestnut Hill, MA 02467;Wei-Sheng LeeGeballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305;F. SchmittGeballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305;Dong-Hui LuStanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025;R. G. MooreStanford Institute for Materials and Energy Sciences andChao ZhangState Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People’s Republic of China;W. MeevasanaSchool of Physics, Suranaree University of Technology, Muang, Nakhon Ratchasima 30000, Thailand;T. SasagawaMaterials and Structures Laboratory, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan;S. UchidaDepartment of Physics, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan;Kazuhiro FujitaLaboratory for Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853;Shigeyuki IshidaDepartment of Physics, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan;M. IshikadoQuantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan;Yoshiyuki YoshidaSuperconducting Electronics Group, Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8568, Japan; andHiroshi EisakiSuperconducting Electronics Group, Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8568, Japan; andZahid HussainAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720Thomas DevereauxGeballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305;Zhi‐Xun ShenGeballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305;

2012en

ABI

Аннотация

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.

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Идентификаторы

DOI: 10.1073/pnas.1209471109

Цитирования и источники

Цитирований: 7Использованных источников: 0

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