Superconducting energy gap in Bi2Sr2CaCu2O8 observed by high-resolution photoemission spectroscopy

Takayoshi Yokoya, Takashi Takahashi, Akihiko Fujiwara, Yoji Koike

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (Δ) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.

Original languageEnglish
Pages (from-to)553-556
Number of pages4
JournalSolid State Communications
Volume87
Issue number6
DOIs
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Photoemission
Photoelectron spectroscopy
Fermi level
Spectrometers
Energy gap
photoelectric emission
spectrometers
high resolution
Polycrystals
polycrystals
Binding energy
spectroscopy
cuprates
Superconducting materials
Superconducting transition temperature
Electronic structure
binding energy
transition temperature
electronic structure
Computer simulation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Superconducting energy gap in Bi2Sr2CaCu2O8 observed by high-resolution photoemission spectroscopy. / Yokoya, Takayoshi; Takahashi, Takashi; Fujiwara, Akihiko; Koike, Yoji.

In: Solid State Communications, Vol. 87, No. 6, 1993, p. 553-556.

Research output: Contribution to journalArticle

Yokoya, Takayoshi ; Takahashi, Takashi ; Fujiwara, Akihiko ; Koike, Yoji. / Superconducting energy gap in Bi2Sr2CaCu2O8 observed by high-resolution photoemission spectroscopy. In: Solid State Communications. 1993 ; Vol. 87, No. 6. pp. 553-556.
@article{ba2c435f6af441f9be1bb50bd4d46211,
title = "Superconducting energy gap in Bi2Sr2CaCu2O8 observed by high-resolution photoemission spectroscopy",
abstract = "A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (Δ) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.",
author = "Takayoshi Yokoya and Takashi Takahashi and Akihiko Fujiwara and Yoji Koike",
year = "1993",
doi = "10.1016/0038-1098(93)90595-E",
language = "English",
volume = "87",
pages = "553--556",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "6",

}

TY - JOUR

T1 - Superconducting energy gap in Bi2Sr2CaCu2O8 observed by high-resolution photoemission spectroscopy

AU - Yokoya, Takayoshi

AU - Takahashi, Takashi

AU - Fujiwara, Akihiko

AU - Koike, Yoji

PY - 1993

Y1 - 1993

N2 - A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (Δ) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.

AB - A high-energy resolved low-temperature photoemission spectrometer of angle-integrated mode was constructed to study the detailed electronic structure near the Fermi level of novel materials, in particular, cuprate high-Tc superconductors. Photoemission measurement with this spectrometer on a Bi2Sr2CaCu2O8 polycrystal clearly showed a transfer of spectral weight from the vicinity of the Fermi level to the higher binding-energy region below the superconducting transition temperature, indicating opening of the superconducting gap. Numerical simulation for both normal and superconducting states showed that the superconducting gap parameter (Δ) of 18 meV with dx2-y2 symmetry gives a most reasonable fitting.

UR - http://www.scopus.com/inward/record.url?scp=0027642652&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027642652&partnerID=8YFLogxK

U2 - 10.1016/0038-1098(93)90595-E

DO - 10.1016/0038-1098(93)90595-E

M3 - Article

AN - SCOPUS:0027642652

VL - 87

SP - 553

EP - 556

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 6

ER -