Phonon structures in tunneling conductance of superconducting YBa2Cu3O7

Toshikazu Ekino, Jun Akimitsu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report on measurements of the tunneling conductance structures above the superconducting gap energy using YBa2Cu3O7 polycrystalline junctions. The measured second derivative data are reproducible among the junctions, and the intensities of the common structures at the biases of 37-38, 47-53, 67-77, and 94-95 mV are strong enough to be assigned. These structures are in agreement with those in the neutron phonon density of states in whole energy regions when the energies are measured from the gap edge of 26±1 meV. This correspondence indicates that the electron-phonon interaction contributes to the pairing mechanism of this superconductor.

Original languageEnglish
Pages (from-to)367-369
Number of pages3
JournalJournal of Superconductivity
Volume7
Issue number2
DOIs
Publication statusPublished - Apr 1994
Externally publishedYes

Fingerprint

Electron-phonon interactions
Superconducting materials
Neutrons
Energy gap
Derivatives
electron phonon interactions
neutrons
energy
barium copper yttrium oxide

Keywords

  • phonon structure
  • second derivative
  • Tunneling conductance
  • YBaCuO

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electronic, Optical and Magnetic Materials

Cite this

Phonon structures in tunneling conductance of superconducting YBa2Cu3O7. / Ekino, Toshikazu; Akimitsu, Jun.

In: Journal of Superconductivity, Vol. 7, No. 2, 04.1994, p. 367-369.

Research output: Contribution to journalArticle

@article{665a17df896a4f539cc1e26b1c456fe2,
title = "Phonon structures in tunneling conductance of superconducting YBa2Cu3O7",
abstract = "We report on measurements of the tunneling conductance structures above the superconducting gap energy using YBa2Cu3O7 polycrystalline junctions. The measured second derivative data are reproducible among the junctions, and the intensities of the common structures at the biases of 37-38, 47-53, 67-77, and 94-95 mV are strong enough to be assigned. These structures are in agreement with those in the neutron phonon density of states in whole energy regions when the energies are measured from the gap edge of 26±1 meV. This correspondence indicates that the electron-phonon interaction contributes to the pairing mechanism of this superconductor.",
keywords = "phonon structure, second derivative, Tunneling conductance, YBaCuO",
author = "Toshikazu Ekino and Jun Akimitsu",
year = "1994",
month = "4",
doi = "10.1007/BF00724570",
language = "English",
volume = "7",
pages = "367--369",
journal = "Journal of Superconductivity and Novel Magnetism",
issn = "1557-1939",
publisher = "Springer New York",
number = "2",

}

TY - JOUR

T1 - Phonon structures in tunneling conductance of superconducting YBa2Cu3O7

AU - Ekino, Toshikazu

AU - Akimitsu, Jun

PY - 1994/4

Y1 - 1994/4

N2 - We report on measurements of the tunneling conductance structures above the superconducting gap energy using YBa2Cu3O7 polycrystalline junctions. The measured second derivative data are reproducible among the junctions, and the intensities of the common structures at the biases of 37-38, 47-53, 67-77, and 94-95 mV are strong enough to be assigned. These structures are in agreement with those in the neutron phonon density of states in whole energy regions when the energies are measured from the gap edge of 26±1 meV. This correspondence indicates that the electron-phonon interaction contributes to the pairing mechanism of this superconductor.

AB - We report on measurements of the tunneling conductance structures above the superconducting gap energy using YBa2Cu3O7 polycrystalline junctions. The measured second derivative data are reproducible among the junctions, and the intensities of the common structures at the biases of 37-38, 47-53, 67-77, and 94-95 mV are strong enough to be assigned. These structures are in agreement with those in the neutron phonon density of states in whole energy regions when the energies are measured from the gap edge of 26±1 meV. This correspondence indicates that the electron-phonon interaction contributes to the pairing mechanism of this superconductor.

KW - phonon structure

KW - second derivative

KW - Tunneling conductance

KW - YBaCuO

UR - http://www.scopus.com/inward/record.url?scp=0028407296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028407296&partnerID=8YFLogxK

U2 - 10.1007/BF00724570

DO - 10.1007/BF00724570

M3 - Article

AN - SCOPUS:0028407296

VL - 7

SP - 367

EP - 369

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 2

ER -