Bulk and surface low-energy excitations in Y Ba2 Cu3 O7-δ studied by high-resolution angle-resolved photoemission spectroscopy

K. Nakayama, T. Sato, Kensei Terashima, H. Matsui, T. Takahashi, M. Kubota, K. Ono, T. Nishizaki, Y. Takahashi, N. Kobayashi

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy on Y Ba2 Cu3 O7-δ (Y123; δ=0.06; Tc =92 K). By accurately determining the Fermi surface and energy band dispersion, we solve long-standing controversial issues as to the anomalous electronic states of Y-based high- Tc cuprates. We unambiguously identified surface-bilayer-derived bonding and antibonding bands, together with their bulk counterparts. The surface bands are highly overdoped (hole concentration x=0.29), showing no evidence for the gap opening or the dispersion anomaly in the antinodal region, while the bulk bands show a clear d x2 - y2 -wave superconducting gap and the Bogoliubov quasiparticlelike behavior with a characteristic energy scale of 50-60 meV indicative of a strong electron-boson coupling in the superconducting state. All these results suggest that the metallic and superconducting states coexist at the adjacent bilayer of Y123 surface.

Original languageEnglish
Article number014513
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number1
DOIs
Publication statusPublished - 2007
Externally publishedYes

Fingerprint

Excitation energy
Photoelectron spectroscopy
photoelectric emission
high resolution
spectroscopy
excitation
Hole concentration
Bosons
Fermi surface
Electronic states
Fermi level
Band structure
energy
cuprates
Fermi surfaces
energy bands
bosons
Electrons
anomalies
electronics

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Bulk and surface low-energy excitations in Y Ba2 Cu3 O7-δ studied by high-resolution angle-resolved photoemission spectroscopy. / Nakayama, K.; Sato, T.; Terashima, Kensei; Matsui, H.; Takahashi, T.; Kubota, M.; Ono, K.; Nishizaki, T.; Takahashi, Y.; Kobayashi, N.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 1, 014513, 2007.

Research output: Contribution to journalArticle

Nakayama, K, Sato, T, Terashima, K, Matsui, H, Takahashi, T, Kubota, M, Ono, K, Nishizaki, T, Takahashi, Y & Kobayashi, N 2007, 'Bulk and surface low-energy excitations in Y Ba2 Cu3 O7-δ studied by high-resolution angle-resolved photoemission spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 75, no. 1, 014513. https://doi.org/10.1103/PhysRevB.75.014513
Nakayama, K. ; Sato, T. ; Terashima, Kensei ; Matsui, H. ; Takahashi, T. ; Kubota, M. ; Ono, K. ; Nishizaki, T. ; Takahashi, Y. ; Kobayashi, N. / Bulk and surface low-energy excitations in Y Ba2 Cu3 O7-δ studied by high-resolution angle-resolved photoemission spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 75, No. 1.
@article{dc91e6e0b6f24818876f00855e8037f6,
title = "Bulk and surface low-energy excitations in Y Ba2 Cu3 O7-δ studied by high-resolution angle-resolved photoemission spectroscopy",
abstract = "We have performed high-resolution angle-resolved photoemission spectroscopy on Y Ba2 Cu3 O7-δ (Y123; δ=0.06; Tc =92 K). By accurately determining the Fermi surface and energy band dispersion, we solve long-standing controversial issues as to the anomalous electronic states of Y-based high- Tc cuprates. We unambiguously identified surface-bilayer-derived bonding and antibonding bands, together with their bulk counterparts. The surface bands are highly overdoped (hole concentration x=0.29), showing no evidence for the gap opening or the dispersion anomaly in the antinodal region, while the bulk bands show a clear d x2 - y2 -wave superconducting gap and the Bogoliubov quasiparticlelike behavior with a characteristic energy scale of 50-60 meV indicative of a strong electron-boson coupling in the superconducting state. All these results suggest that the metallic and superconducting states coexist at the adjacent bilayer of Y123 surface.",
author = "K. Nakayama and T. Sato and Kensei Terashima and H. Matsui and T. Takahashi and M. Kubota and K. Ono and T. Nishizaki and Y. Takahashi and N. Kobayashi",
year = "2007",
doi = "10.1103/PhysRevB.75.014513",
language = "English",
volume = "75",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "1",

}

TY - JOUR

T1 - Bulk and surface low-energy excitations in Y Ba2 Cu3 O7-δ studied by high-resolution angle-resolved photoemission spectroscopy

AU - Nakayama, K.

AU - Sato, T.

AU - Terashima, Kensei

AU - Matsui, H.

AU - Takahashi, T.

AU - Kubota, M.

AU - Ono, K.

AU - Nishizaki, T.

AU - Takahashi, Y.

AU - Kobayashi, N.

PY - 2007

Y1 - 2007

N2 - We have performed high-resolution angle-resolved photoemission spectroscopy on Y Ba2 Cu3 O7-δ (Y123; δ=0.06; Tc =92 K). By accurately determining the Fermi surface and energy band dispersion, we solve long-standing controversial issues as to the anomalous electronic states of Y-based high- Tc cuprates. We unambiguously identified surface-bilayer-derived bonding and antibonding bands, together with their bulk counterparts. The surface bands are highly overdoped (hole concentration x=0.29), showing no evidence for the gap opening or the dispersion anomaly in the antinodal region, while the bulk bands show a clear d x2 - y2 -wave superconducting gap and the Bogoliubov quasiparticlelike behavior with a characteristic energy scale of 50-60 meV indicative of a strong electron-boson coupling in the superconducting state. All these results suggest that the metallic and superconducting states coexist at the adjacent bilayer of Y123 surface.

AB - We have performed high-resolution angle-resolved photoemission spectroscopy on Y Ba2 Cu3 O7-δ (Y123; δ=0.06; Tc =92 K). By accurately determining the Fermi surface and energy band dispersion, we solve long-standing controversial issues as to the anomalous electronic states of Y-based high- Tc cuprates. We unambiguously identified surface-bilayer-derived bonding and antibonding bands, together with their bulk counterparts. The surface bands are highly overdoped (hole concentration x=0.29), showing no evidence for the gap opening or the dispersion anomaly in the antinodal region, while the bulk bands show a clear d x2 - y2 -wave superconducting gap and the Bogoliubov quasiparticlelike behavior with a characteristic energy scale of 50-60 meV indicative of a strong electron-boson coupling in the superconducting state. All these results suggest that the metallic and superconducting states coexist at the adjacent bilayer of Y123 surface.

UR - http://www.scopus.com/inward/record.url?scp=33846410698&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846410698&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.75.014513

DO - 10.1103/PhysRevB.75.014513

M3 - Article

AN - SCOPUS:33846410698

VL - 75

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 1

M1 - 014513

ER -