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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

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [9];  [10];  [11];  [12];  [13];  [10];  [14]
  1. Univ. of Tokyo (Japan); UVSOR-III Synchrotron, Okazaki (Japan). Inst. for Molecular Sciences; Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Kyoto Univ. (Japan)
  4. UVSOR-III Synchrotron, Okazaki (Japan). Inst. for Molecular Sciences
  5. Japan Atomic Energy Agency (JAEA), Tokai (Japan). Advanced Science Research Center
  6. Osaka Prefecture Univ., Sakai (Japan); Hiroshima Univ. (Japan)
  7. Hiroshima Univ. (Japan); Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center; Kurume Inst. of Technology, Fukuoka (Japan)
  8. Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center
  9. Hiroshima Univ. (Japan); Hiroshima Univ. (Japan). Hiroshima Synchrotron Radiation Center
  10. Univ. of Tokyo (Japan); National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
  11. Univ. of Tokyo (Japan)
  12. 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
  13. 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)
  14. Univ. of Tokyo (Japan); Waseda Univ., Tokyo (Japan)
+ Show Author Affiliations

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 Laboratory (SLAC), 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
OSTI ID:
1868365
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 127; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (10)

FIG. 1(p. 5)figure FIG. 1
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 6)figure FIG. 3
FIG. 4(p. 6)figure FIG. 4
FIG. S1(p. 7)figure FIG. S1
FIG. S2(p. 7)figure FIG. S2
FIG. S3(p. 9)figure FIG. S3
FIG. S4(p. 10)figure FIG. S4
FIG. S5(p. 11)figure FIG. S5
FIG. S6(p. 13)figure FIG. S6

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
angle-resolved photoemission spectroscopy
cuprates
d-wave
electronic structure
high-temperature superconductors
multilayer thin films
superconducting gap
superconducting order parameter