Anomalous voltage noise at the superconducting transition of tin films

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report voltage noise studies in the superconducting transition of thin Tin (Sn) films. Voltage noises are measured as a function of temperature and ac current. The noise spectral power S 1/2 strongly depends on the temperature and current, with the peak temperature in S 1/2 shifted down from that of dR/dT. Comparison with the dc noise measurement shows the S 1/2 is much larger with ac current than dc. I-V characteristics and voltage noises are measured simultaneously to reveal the nature of the excess noises. The noise dependence on voltage strongly suggests the nature of vortex shot noise with a characteristic √V dependence for small V and reduction of S 1/2 due to strong correlation of vortices at large V.

Original languageEnglish (US)
Pages (from-to)206-210
Number of pages5
JournalJournal of Low Temperature Physics
Volume151
Issue number1-2 PART 1
DOIs
StatePublished - Apr 2008

Fingerprint

Tin
tin
Electric potential
electric potential
Vortex flow
Shot noise
vortices
Temperature
shot noise
noise measurement
white noise
temperature

Keywords

  • Superconducting transition
  • Voltage noises
  • Vortex motion

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Anomalous voltage noise at the superconducting transition of tin films. / Zhang, Hengsong; Zuo, Fulin; Galeazzi, Massimiliano.

In: Journal of Low Temperature Physics, Vol. 151, No. 1-2 PART 1, 04.2008, p. 206-210.

Research output: Contribution to journalArticle

@article{0edd5b6232d84d7ea971bf059f68415c,
title = "Anomalous voltage noise at the superconducting transition of tin films",
abstract = "We report voltage noise studies in the superconducting transition of thin Tin (Sn) films. Voltage noises are measured as a function of temperature and ac current. The noise spectral power S 1/2 strongly depends on the temperature and current, with the peak temperature in S 1/2 shifted down from that of dR/dT. Comparison with the dc noise measurement shows the S 1/2 is much larger with ac current than dc. I-V characteristics and voltage noises are measured simultaneously to reveal the nature of the excess noises. The noise dependence on voltage strongly suggests the nature of vortex shot noise with a characteristic √V dependence for small V and reduction of S 1/2 due to strong correlation of vortices at large V.",
keywords = "Superconducting transition, Voltage noises, Vortex motion",
author = "Hengsong Zhang and Fulin Zuo and Massimiliano Galeazzi",
year = "2008",
month = "4",
doi = "10.1007/s10909-007-9644-y",
language = "English (US)",
volume = "151",
pages = "206--210",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer New York",
number = "1-2 PART 1",

}

TY - JOUR

T1 - Anomalous voltage noise at the superconducting transition of tin films

AU - Zhang, Hengsong

AU - Zuo, Fulin

AU - Galeazzi, Massimiliano

PY - 2008/4

Y1 - 2008/4

N2 - We report voltage noise studies in the superconducting transition of thin Tin (Sn) films. Voltage noises are measured as a function of temperature and ac current. The noise spectral power S 1/2 strongly depends on the temperature and current, with the peak temperature in S 1/2 shifted down from that of dR/dT. Comparison with the dc noise measurement shows the S 1/2 is much larger with ac current than dc. I-V characteristics and voltage noises are measured simultaneously to reveal the nature of the excess noises. The noise dependence on voltage strongly suggests the nature of vortex shot noise with a characteristic √V dependence for small V and reduction of S 1/2 due to strong correlation of vortices at large V.

AB - We report voltage noise studies in the superconducting transition of thin Tin (Sn) films. Voltage noises are measured as a function of temperature and ac current. The noise spectral power S 1/2 strongly depends on the temperature and current, with the peak temperature in S 1/2 shifted down from that of dR/dT. Comparison with the dc noise measurement shows the S 1/2 is much larger with ac current than dc. I-V characteristics and voltage noises are measured simultaneously to reveal the nature of the excess noises. The noise dependence on voltage strongly suggests the nature of vortex shot noise with a characteristic √V dependence for small V and reduction of S 1/2 due to strong correlation of vortices at large V.

KW - Superconducting transition

KW - Voltage noises

KW - Vortex motion

UR - http://www.scopus.com/inward/record.url?scp=40649127425&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=40649127425&partnerID=8YFLogxK

U2 - 10.1007/s10909-007-9644-y

DO - 10.1007/s10909-007-9644-y

M3 - Article

VL - 151

SP - 206

EP - 210

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 1-2 PART 1

ER -