Vortex imaging in unconventional superconductors

Simon J Bending, Peter J Curran, Waled M A Desoky, Volodymyr V Khotkevych, A Gibbs, A P Mackenzie, T Tamegai, S E Sebastian

Research output: Contribution to journalArticle

2 Citations (Scopus)
85 Downloads (Pure)

Abstract

The real space imaging of vortices in unconventional superconductors not only provides important information about the effectiveness of flux pinning that can inform high current applications, but also yields crucial insights into the form of the superconducting order parameter. For example, the structure of the vortex lattice reflects effective mass and order parameter anisotropies within the material, and profiles of isolated vortices provide a local measure of the magnetic penetration depth that can be used to infer the superfluid density. We describe here the analysis of recent studies whereby state-of-the-art scanning Hall probe microscopy (SHPM) has been used to perform vortex-resolved magnetic imaging on two distinct families of unconventional superconductors. Two sets of results will be analysed in detail; (i) vortex lattice structural transitions in the p-wave superconductor Sr 2RuO 4 that reflect underlying anisotropies in the system and (ii) a quantitative analysis of vortex profiles in Co-doped 122 pnictide superconductors (SrFe 2- x Co x As 2 & BaFe 2- x Co x As 2) that allows one to infer the temperature-dependent superfluid density. The latter has then been compared with predictions for different order parameter models for a multiband superconductor.
Original languageEnglish
Pages (from-to)65-68
JournalPhysica C: Superconductivity and its Applications
Volume479
DOIs
Publication statusPublished - Sep 2012

Fingerprint

Superconducting materials
Vortex flow
vortices
Imaging techniques
Anisotropy
Flux pinning
anisotropy
Group 5A compounds
flux pinning
profiles
quantitative analysis
high current
Microscopic examination
penetration
microscopy
Scanning
scanning
probes
predictions
Chemical analysis

Cite this

Bending, S. J., Curran, P. J., Desoky, W. M. A., Khotkevych, V. V., Gibbs, A., Mackenzie, A. P., ... Sebastian, S. E. (2012). Vortex imaging in unconventional superconductors. Physica C: Superconductivity and its Applications, 479, 65-68. https://doi.org/10.1016/j.physc.2011.12.010

Vortex imaging in unconventional superconductors. / Bending, Simon J; Curran, Peter J; Desoky, Waled M A; Khotkevych, Volodymyr V; Gibbs, A; Mackenzie, A P; Tamegai, T; Sebastian, S E.

In: Physica C: Superconductivity and its Applications, Vol. 479, 09.2012, p. 65-68.

Research output: Contribution to journalArticle

Bending, SJ, Curran, PJ, Desoky, WMA, Khotkevych, VV, Gibbs, A, Mackenzie, AP, Tamegai, T & Sebastian, SE 2012, 'Vortex imaging in unconventional superconductors', Physica C: Superconductivity and its Applications, vol. 479, pp. 65-68. https://doi.org/10.1016/j.physc.2011.12.010
Bending, Simon J ; Curran, Peter J ; Desoky, Waled M A ; Khotkevych, Volodymyr V ; Gibbs, A ; Mackenzie, A P ; Tamegai, T ; Sebastian, S E. / Vortex imaging in unconventional superconductors. In: Physica C: Superconductivity and its Applications. 2012 ; Vol. 479. pp. 65-68.
@article{ab6b68075fad48e781ba7fb943087f38,
title = "Vortex imaging in unconventional superconductors",
abstract = "The real space imaging of vortices in unconventional superconductors not only provides important information about the effectiveness of flux pinning that can inform high current applications, but also yields crucial insights into the form of the superconducting order parameter. For example, the structure of the vortex lattice reflects effective mass and order parameter anisotropies within the material, and profiles of isolated vortices provide a local measure of the magnetic penetration depth that can be used to infer the superfluid density. We describe here the analysis of recent studies whereby state-of-the-art scanning Hall probe microscopy (SHPM) has been used to perform vortex-resolved magnetic imaging on two distinct families of unconventional superconductors. Two sets of results will be analysed in detail; (i) vortex lattice structural transitions in the p-wave superconductor Sr 2RuO 4 that reflect underlying anisotropies in the system and (ii) a quantitative analysis of vortex profiles in Co-doped 122 pnictide superconductors (SrFe 2- x Co x As 2 & BaFe 2- x Co x As 2) that allows one to infer the temperature-dependent superfluid density. The latter has then been compared with predictions for different order parameter models for a multiband superconductor.",
author = "Bending, {Simon J} and Curran, {Peter J} and Desoky, {Waled M A} and Khotkevych, {Volodymyr V} and A Gibbs and Mackenzie, {A P} and T Tamegai and Sebastian, {S E}",
year = "2012",
month = "9",
doi = "10.1016/j.physc.2011.12.010",
language = "English",
volume = "479",
pages = "65--68",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",

}

TY - JOUR

T1 - Vortex imaging in unconventional superconductors

AU - Bending, Simon J

AU - Curran, Peter J

AU - Desoky, Waled M A

AU - Khotkevych, Volodymyr V

AU - Gibbs, A

AU - Mackenzie, A P

AU - Tamegai, T

AU - Sebastian, S E

PY - 2012/9

Y1 - 2012/9

N2 - The real space imaging of vortices in unconventional superconductors not only provides important information about the effectiveness of flux pinning that can inform high current applications, but also yields crucial insights into the form of the superconducting order parameter. For example, the structure of the vortex lattice reflects effective mass and order parameter anisotropies within the material, and profiles of isolated vortices provide a local measure of the magnetic penetration depth that can be used to infer the superfluid density. We describe here the analysis of recent studies whereby state-of-the-art scanning Hall probe microscopy (SHPM) has been used to perform vortex-resolved magnetic imaging on two distinct families of unconventional superconductors. Two sets of results will be analysed in detail; (i) vortex lattice structural transitions in the p-wave superconductor Sr 2RuO 4 that reflect underlying anisotropies in the system and (ii) a quantitative analysis of vortex profiles in Co-doped 122 pnictide superconductors (SrFe 2- x Co x As 2 & BaFe 2- x Co x As 2) that allows one to infer the temperature-dependent superfluid density. The latter has then been compared with predictions for different order parameter models for a multiband superconductor.

AB - The real space imaging of vortices in unconventional superconductors not only provides important information about the effectiveness of flux pinning that can inform high current applications, but also yields crucial insights into the form of the superconducting order parameter. For example, the structure of the vortex lattice reflects effective mass and order parameter anisotropies within the material, and profiles of isolated vortices provide a local measure of the magnetic penetration depth that can be used to infer the superfluid density. We describe here the analysis of recent studies whereby state-of-the-art scanning Hall probe microscopy (SHPM) has been used to perform vortex-resolved magnetic imaging on two distinct families of unconventional superconductors. Two sets of results will be analysed in detail; (i) vortex lattice structural transitions in the p-wave superconductor Sr 2RuO 4 that reflect underlying anisotropies in the system and (ii) a quantitative analysis of vortex profiles in Co-doped 122 pnictide superconductors (SrFe 2- x Co x As 2 & BaFe 2- x Co x As 2) that allows one to infer the temperature-dependent superfluid density. The latter has then been compared with predictions for different order parameter models for a multiband superconductor.

UR - http://www.scopus.com/inward/record.url?scp=84865742026&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1016/j.physc.2011.12.010

U2 - 10.1016/j.physc.2011.12.010

DO - 10.1016/j.physc.2011.12.010

M3 - Article

VL - 479

SP - 65

EP - 68

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

ER -