Hybridization of Bogoliubov Quasiparticles between Adjacent CuO 2 Layers in the Triple-Layer Cuprate Bi 2 Sr 2 Ca 2 Cu 3 O 10 + δ Studied by Angle-Resolved Photoemission Spectroscopy
- Univ. of Tokyo (Japan); UVSOR-III Synchrotron, Okazaki (Japan). Inst. for Molecular Sciences; Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center
- Univ. of Tennessee, Knoxville, TN (United States)
- Kyoto Univ. (Japan)
- UVSOR-III Synchrotron, Okazaki (Japan). Inst. for Molecular Sciences
- Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
- Osaka Prefecture Univ., Sakai (Japan); Hiroshima Univ. (Japan)
- Hiroshima Univ. (Japan); Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center; Kurume Inst. of Technology, Fukuoka (Japan)
- Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center
- Hiroshima Univ. (Japan); Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center
- Univ. of Tokyo (Japan); National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
- Univ. of Tokyo (Japan)
- Univ. of Tokyo (Japan); High Energy Accelerator Research Organization (KEK), Tsukuba (Japan). J-PARC Center and Inst. of Materials Structure Science; TRIUMF, Vancouver, BC (Canada). Center for Molecular and Materials Science
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States)
- Univ. of Tokyo (Japan); Waseda Univ., Tokyo (Japan)
Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO2 layers in the triple-layer cuprate high-temperature superconductor Bi2Sr2Cu2Cu3O10+δ is studied by angle-resolved photoemission spectroscopy (ARPES). In the superconducting state, an anticrossing gap opens between the outer- and inner-BQP bands, which we attribute primarily to interlayer single-particle hopping with possible contributions from interlayer Cooper pairing. We find that the d-wave superconducting gap of both BQP bands smoothly develops with momentum without an abrupt jump in contrast to a previous ARPES study. Hybridization between the BQPs also gradually increases in going from the off nodal to the antinodal region, which is explained by the momentum dependence of the interlayer single-particle hopping. As possible mechanisms for the enhancement of the superconducting transition temperature, the hybridization between the BQPs as well as the combination of phonon modes of the triple CuO2 layers and spin fluctuations represented by a four-well model are discussed.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Japan Society for the Promotion of Science (JSPS)
- Grant/Contract Number:
- AC02-76SF00515; 5K17709; 22740221; 15H02109; 16K05445; 19K03741
- OSTI ID:
- 1868365
- Journal Information:
- Physical Review Letters, Vol. 127, Issue 21; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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