Статья

Simultaneous Transitions in Cuprate Momentum-Space Topology and Electronic Symmetry Breaking

K. FujitaCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USAChung Koo KimCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USAInhee LeeCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USAJinho LeeCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USAMohammad HamidianCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USAInês FirmoLaboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USASourin MukhopadhyayCornell Center for Materials Research, Cornell University, Ithaca, NY 14853, USAH. EisakiInstitute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, JapanS. UchidaDepartment of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, JapanMichael J. LawlerDepartment of Physics and Astronomy, Binghamton University, Binghamton, NY 13902, USAEun-Ah KimLaboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853, USAJ. C. DavisCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA

2014en

ABI

Аннотация

The existence of electronic symmetry breaking in the underdoped cuprates and its disappearance with increased hole density p are now widely reported. However, the relation between this transition and the momentum-space (k-space) electronic structure underpinning the superconductivity has not yet been established. Here, we visualize the Q = 0 (intra-unit-cell) and Q ≠ 0 (density-wave) broken-symmetry states, simultaneously with the coherent k-space topology, for Bi₂Sr₂CaCu₂O(8+δ) samples spanning the phase diagram 0.06 ≤ p ≤ 0.23. We show that the electronic symmetry-breaking tendencies weaken with increasing p and disappear close to a critical doping p(c) = 0.19. Concomitantly, the coherent k-space topology undergoes an abrupt transition, from arcs to closed contours, at the same p(c). These data reveal that the k-space topology transformation in cuprates is linked intimately with the disappearance of the electronic symmetry breaking at a concealed critical point.

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Идентификаторы

DOI: 10.1126/science.1248783

Цитирования и источники

Цитирований: 3Использованных источников: 0

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