Absence of a Kosterlitz-Thouless transition in ultrathin films

J. Repaci, C. Kwon, Qi Li, Xiuguang Jiang, T. Venkatessan, R. Glover, C. Lobb, R. Newrock

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

We have performed nanovolt-level dc measurements on single-unit-cell films of (Formula presented). When only the low-sensitivity data are analyzed, they are roughly consistent with the occurrence of a Kosterlitz-Thouless transition. At the lowest currents and voltages, however, the samples are ohmic at temperatures quite far below the nominal Kosterlitz-Thouless transition temperature, contrary to the theory. The ohmic response at low currents implies that there are unbound vortices present well below the nominal Kosterlitz-Thouless transition temperature.

Original languageEnglish (US)
Pages (from-to)R9674-R9677
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number14
DOIs
StatePublished - Jan 1 1996

Fingerprint

Ultrathin films
low currents
Superconducting transition temperature
Vortex flow
transition temperature
Electric potential
low voltage
occurrences
vortices
Temperature
sensitivity
cells
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Repaci, J. ; Kwon, C. ; Li, Qi ; Jiang, Xiuguang ; Venkatessan, T. ; Glover, R. ; Lobb, C. ; Newrock, R. / Absence of a Kosterlitz-Thouless transition in ultrathin films. In: Physical Review B - Condensed Matter and Materials Physics. 1996 ; Vol. 54, No. 14. pp. R9674-R9677.
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Repaci, J, Kwon, C, Li, Q, Jiang, X, Venkatessan, T, Glover, R, Lobb, C & Newrock, R 1996, 'Absence of a Kosterlitz-Thouless transition in ultrathin films', Physical Review B - Condensed Matter and Materials Physics, vol. 54, no. 14, pp. R9674-R9677. https://doi.org/10.1103/PhysRevB.54.R9674

Absence of a Kosterlitz-Thouless transition in ultrathin films. / Repaci, J.; Kwon, C.; Li, Qi; Jiang, Xiuguang; Venkatessan, T.; Glover, R.; Lobb, C.; Newrock, R.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 54, No. 14, 01.01.1996, p. R9674-R9677.

Research output: Contribution to journalArticle

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