Transport and noise properties of high Tc bicrystal junctions

Keiji Enpuku, T. Minotani, F. Shiraishi, S. Ohta

Research output: Contribution to journalArticle

Abstract

Transport properties of YBa2Cu3O7-x bicrystal junctions are studied from the relationship between the critical current Ic and the resistance R of the junction. The relation is obtained when misorientation angle of the junction is changed from 24 to 36.8 degrees. The experimental result can be well explained when two effects are taken into account in the tunnelling of electrons, i.e. resonant tunnelling of quasiparticles via localized states in an insulating barrier and d-wave symmetry of the superconducting order parameter. Low frequency 1/f noise of the junction is also measured, and the fluctuations of Ic and R are obtained as a function of junction parameters. A simple model of the barrier height fluctuation due to the capture and emission of electrons in the localized states can quantitatively explain the experimental results. The present model can consistently explain both the transport and noise characteristics of the bicrystal junction.

Original languageEnglish
Pages (from-to)792-794
Number of pages3
JournalSuperconductor Science and Technology
Volume12
Issue number11
DOIs
Publication statusPublished - Nov 1999

Fingerprint

Bicrystals
bicrystals
transport properties
Resonant tunneling
Electron tunneling
Electrons
Critical currents
Transport properties
resonant tunneling
misalignment
critical current
electrons
low frequencies
symmetry
barium copper yttrium oxide

All Science Journal Classification (ASJC) codes

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

Cite this

Transport and noise properties of high Tc bicrystal junctions. / Enpuku, Keiji; Minotani, T.; Shiraishi, F.; Ohta, S.

In: Superconductor Science and Technology, Vol. 12, No. 11, 11.1999, p. 792-794.

Research output: Contribution to journalArticle

Enpuku, Keiji ; Minotani, T. ; Shiraishi, F. ; Ohta, S. / Transport and noise properties of high Tc bicrystal junctions. In: Superconductor Science and Technology. 1999 ; Vol. 12, No. 11. pp. 792-794.
@article{5b91c24e0ee44e6eb9f456e773e9e3a4,
title = "Transport and noise properties of high Tc bicrystal junctions",
abstract = "Transport properties of YBa2Cu3O7-x bicrystal junctions are studied from the relationship between the critical current Ic and the resistance R of the junction. The relation is obtained when misorientation angle of the junction is changed from 24 to 36.8 degrees. The experimental result can be well explained when two effects are taken into account in the tunnelling of electrons, i.e. resonant tunnelling of quasiparticles via localized states in an insulating barrier and d-wave symmetry of the superconducting order parameter. Low frequency 1/f noise of the junction is also measured, and the fluctuations of Ic and R are obtained as a function of junction parameters. A simple model of the barrier height fluctuation due to the capture and emission of electrons in the localized states can quantitatively explain the experimental results. The present model can consistently explain both the transport and noise characteristics of the bicrystal junction.",
author = "Keiji Enpuku and T. Minotani and F. Shiraishi and S. Ohta",
year = "1999",
month = "11",
doi = "10.1088/0953-2048/12/11/330",
language = "English",
volume = "12",
pages = "792--794",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "11",

}

TY - JOUR

T1 - Transport and noise properties of high Tc bicrystal junctions

AU - Enpuku, Keiji

AU - Minotani, T.

AU - Shiraishi, F.

AU - Ohta, S.

PY - 1999/11

Y1 - 1999/11

N2 - Transport properties of YBa2Cu3O7-x bicrystal junctions are studied from the relationship between the critical current Ic and the resistance R of the junction. The relation is obtained when misorientation angle of the junction is changed from 24 to 36.8 degrees. The experimental result can be well explained when two effects are taken into account in the tunnelling of electrons, i.e. resonant tunnelling of quasiparticles via localized states in an insulating barrier and d-wave symmetry of the superconducting order parameter. Low frequency 1/f noise of the junction is also measured, and the fluctuations of Ic and R are obtained as a function of junction parameters. A simple model of the barrier height fluctuation due to the capture and emission of electrons in the localized states can quantitatively explain the experimental results. The present model can consistently explain both the transport and noise characteristics of the bicrystal junction.

AB - Transport properties of YBa2Cu3O7-x bicrystal junctions are studied from the relationship between the critical current Ic and the resistance R of the junction. The relation is obtained when misorientation angle of the junction is changed from 24 to 36.8 degrees. The experimental result can be well explained when two effects are taken into account in the tunnelling of electrons, i.e. resonant tunnelling of quasiparticles via localized states in an insulating barrier and d-wave symmetry of the superconducting order parameter. Low frequency 1/f noise of the junction is also measured, and the fluctuations of Ic and R are obtained as a function of junction parameters. A simple model of the barrier height fluctuation due to the capture and emission of electrons in the localized states can quantitatively explain the experimental results. The present model can consistently explain both the transport and noise characteristics of the bicrystal junction.

UR - http://www.scopus.com/inward/record.url?scp=0033224815&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033224815&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/12/11/330

DO - 10.1088/0953-2048/12/11/330

M3 - Article

VL - 12

SP - 792

EP - 794

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 11

ER -