Local superfluid densities probed via current-induced superconducting phase gradients

David S. Hopkins; David Pekker; Tzu Chieh Wei; Paul M. Goldbart; Alexey Bezryadin

doi:10.1103/PhysRevB.76.220506

Local superfluid densities probed via current-induced superconducting phase gradients

David S. Hopkins, David Pekker, Tzu Chieh Wei, Paul M. Goldbart, Alexey Bezryadin

Research output: Contribution to journal › Article › peer-review

Abstract

We have developed a superconducting phase gradiometer consisting of two parallel DNA-templated nanowires connecting two thin-film leads. We have ramped the cross current flowing perpendicular to the nanowires, and observed oscillations in the lead-to-lead resistance due to cross-current-induced phase differences. By using this gradiometer we have measured the temperature- and magnetic-field dependence of the superfluid density, and observed an amplification of phase gradients caused by elastic vortex displacements. We examine our data in light of Miller-Bardeen theory of dirty superconductors and a microscale version of Campbell's model of field penetration.

Original language	English (US)
Article number	220506
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	76
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.76.220506
State	Published - Dec 13 2007

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.76.220506

Cite this

@article{53ffe052fc014de0b91501b6b842d057,

title = "Local superfluid densities probed via current-induced superconducting phase gradients",

abstract = "We have developed a superconducting phase gradiometer consisting of two parallel DNA-templated nanowires connecting two thin-film leads. We have ramped the cross current flowing perpendicular to the nanowires, and observed oscillations in the lead-to-lead resistance due to cross-current-induced phase differences. By using this gradiometer we have measured the temperature- and magnetic-field dependence of the superfluid density, and observed an amplification of phase gradients caused by elastic vortex displacements. We examine our data in light of Miller-Bardeen theory of dirty superconductors and a microscale version of Campbell's model of field penetration.",

author = "Hopkins, {David S.} and David Pekker and Wei, {Tzu Chieh} and Goldbart, {Paul M.} and Alexey Bezryadin",

year = "2007",

month = dec,

day = "13",

doi = "10.1103/PhysRevB.76.220506",

language = "English (US)",

volume = "76",

journal = "Physical Review B-Condensed Matter",

issn = "0163-1829",

publisher = "American Institute of Physics Publising LLC",

number = "22",

}

TY - JOUR

T1 - Local superfluid densities probed via current-induced superconducting phase gradients

AU - Hopkins, David S.

AU - Pekker, David

AU - Wei, Tzu Chieh

AU - Goldbart, Paul M.

AU - Bezryadin, Alexey

PY - 2007/12/13

Y1 - 2007/12/13

N2 - We have developed a superconducting phase gradiometer consisting of two parallel DNA-templated nanowires connecting two thin-film leads. We have ramped the cross current flowing perpendicular to the nanowires, and observed oscillations in the lead-to-lead resistance due to cross-current-induced phase differences. By using this gradiometer we have measured the temperature- and magnetic-field dependence of the superfluid density, and observed an amplification of phase gradients caused by elastic vortex displacements. We examine our data in light of Miller-Bardeen theory of dirty superconductors and a microscale version of Campbell's model of field penetration.

AB - We have developed a superconducting phase gradiometer consisting of two parallel DNA-templated nanowires connecting two thin-film leads. We have ramped the cross current flowing perpendicular to the nanowires, and observed oscillations in the lead-to-lead resistance due to cross-current-induced phase differences. By using this gradiometer we have measured the temperature- and magnetic-field dependence of the superfluid density, and observed an amplification of phase gradients caused by elastic vortex displacements. We examine our data in light of Miller-Bardeen theory of dirty superconductors and a microscale version of Campbell's model of field penetration.

UR - http://www.scopus.com/inward/record.url?scp=37249047470&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37249047470&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.76.220506

DO - 10.1103/PhysRevB.76.220506

M3 - Article

AN - SCOPUS:37249047470

VL - 76

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 22

M1 - 220506

ER -

Local superfluid densities probed via current-induced superconducting phase gradients

Abstract

ASJC Scopus subject areas

Access to Document

Other links

Fingerprint

Cite this