Disorder tuned superconductor insulator transition in La 2-x(Sr/Ce) xCuO 4 & NbN superconducting thin films

J. Vanacken*, G. Zhang, T. Wambecq, V. V. Moshchalkov, B. Leridon, K. Jin, B. R. Zhao, B. Y. Zhu, P. Raychaudhuri, S. P. Chockalingam, M. Chand, J. Jesudasan

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Resumé

In studying the magneto-resistivity ρ(B) in high pulsed magnetic fields up to 55 T, it is often observed that the ρ(B) curves for different temperatures in the vicinity of the critical temperature cross at the same field value, B = B CP. We show how the crossing field changes as a function of the hole (or electron) doping x in La 2-x(Sr/Ce) xCuO 4. The resistivity ρ and the magnetic field B at different temperatures may be scaled as R/R CP and |B - B CP|/T γ, respectively. This kind of scaling resulted in a conventional critical exponent γ = 1/vz = 1.35 (vz ∼0.74) in our La 2-x(Sr/Ce) xCuO 4 thin films, and a much higher value of γ = 4.35 (vz ∼0.23) in the case of our disordered NbN films.

OriginalsprogEngelsk
TidsskriftJournal of Superconductivity and Novel Magnetism
Vol/bind23
Udgave nummer5
Sider (fra-til)807-810
Antal sider4
ISSN1557-1939
DOI
StatusUdgivet - 1. jul. 2010

Fingeraftryk

insulators
disorders
electrical resistivity
thin films
magnetic fields
critical temperature
exponents
scaling
temperature
curves
electrons

Citer dette

Vanacken, J. ; Zhang, G. ; Wambecq, T. ; Moshchalkov, V. V. ; Leridon, B. ; Jin, K. ; Zhao, B. R. ; Zhu, B. Y. ; Raychaudhuri, P. ; Chockalingam, S. P. ; Chand, M. ; Jesudasan, J. / Disorder tuned superconductor insulator transition in La 2-x(Sr/Ce) xCuO 4 & NbN superconducting thin films. I: Journal of Superconductivity and Novel Magnetism. 2010 ; Bind 23, Nr. 5. s. 807-810.
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title = "Disorder tuned superconductor insulator transition in La 2-x(Sr/Ce) xCuO 4 & NbN superconducting thin films",
abstract = "In studying the magneto-resistivity ρ(B) in high pulsed magnetic fields up to 55 T, it is often observed that the ρ(B) curves for different temperatures in the vicinity of the critical temperature cross at the same field value, B = B CP. We show how the crossing field changes as a function of the hole (or electron) doping x in La 2-x(Sr/Ce) xCuO 4. The resistivity ρ and the magnetic field B at different temperatures may be scaled as R/R CP and |B - B CP|/T γ, respectively. This kind of scaling resulted in a conventional critical exponent γ = 1/vz = 1.35 (vz ∼0.74) in our La 2-x(Sr/Ce) xCuO 4 thin films, and a much higher value of γ = 4.35 (vz ∼0.23) in the case of our disordered NbN films.",
keywords = "Crossing point, Disorder, La - (Sr/Ce) CuO, NbN, Superconductivity",
author = "J. Vanacken and G. Zhang and T. Wambecq and Moshchalkov, {V. V.} and B. Leridon and K. Jin and Zhao, {B. R.} and Zhu, {B. Y.} and P. Raychaudhuri and Chockalingam, {S. P.} and M. Chand and J. Jesudasan",
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Vanacken, J, Zhang, G, Wambecq, T, Moshchalkov, VV, Leridon, B, Jin, K, Zhao, BR, Zhu, BY, Raychaudhuri, P, Chockalingam, SP, Chand, M & Jesudasan, J 2010, 'Disorder tuned superconductor insulator transition in La 2-x(Sr/Ce) xCuO 4 & NbN superconducting thin films', Journal of Superconductivity and Novel Magnetism, bind 23, nr. 5, s. 807-810. https://doi.org/10.1007/s10948-010-0663-6

Disorder tuned superconductor insulator transition in La 2-x(Sr/Ce) xCuO 4 & NbN superconducting thin films. / Vanacken, J.; Zhang, G.; Wambecq, T.; Moshchalkov, V. V.; Leridon, B.; Jin, K.; Zhao, B. R.; Zhu, B. Y.; Raychaudhuri, P.; Chockalingam, S. P.; Chand, M.; Jesudasan, J.

I: Journal of Superconductivity and Novel Magnetism, Bind 23, Nr. 5, 01.07.2010, s. 807-810.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Disorder tuned superconductor insulator transition in La 2-x(Sr/Ce) xCuO 4 & NbN superconducting thin films

AU - Vanacken, J.

AU - Zhang, G.

AU - Wambecq, T.

AU - Moshchalkov, V. V.

AU - Leridon, B.

AU - Jin, K.

AU - Zhao, B. R.

AU - Zhu, B. Y.

AU - Raychaudhuri, P.

AU - Chockalingam, S. P.

AU - Chand, M.

AU - Jesudasan, J.

PY - 2010/7/1

Y1 - 2010/7/1

N2 - In studying the magneto-resistivity ρ(B) in high pulsed magnetic fields up to 55 T, it is often observed that the ρ(B) curves for different temperatures in the vicinity of the critical temperature cross at the same field value, B = B CP. We show how the crossing field changes as a function of the hole (or electron) doping x in La 2-x(Sr/Ce) xCuO 4. The resistivity ρ and the magnetic field B at different temperatures may be scaled as R/R CP and |B - B CP|/T γ, respectively. This kind of scaling resulted in a conventional critical exponent γ = 1/vz = 1.35 (vz ∼0.74) in our La 2-x(Sr/Ce) xCuO 4 thin films, and a much higher value of γ = 4.35 (vz ∼0.23) in the case of our disordered NbN films.

AB - In studying the magneto-resistivity ρ(B) in high pulsed magnetic fields up to 55 T, it is often observed that the ρ(B) curves for different temperatures in the vicinity of the critical temperature cross at the same field value, B = B CP. We show how the crossing field changes as a function of the hole (or electron) doping x in La 2-x(Sr/Ce) xCuO 4. The resistivity ρ and the magnetic field B at different temperatures may be scaled as R/R CP and |B - B CP|/T γ, respectively. This kind of scaling resulted in a conventional critical exponent γ = 1/vz = 1.35 (vz ∼0.74) in our La 2-x(Sr/Ce) xCuO 4 thin films, and a much higher value of γ = 4.35 (vz ∼0.23) in the case of our disordered NbN films.

KW - Crossing point

KW - Disorder

KW - La - (Sr/Ce) CuO

KW - NbN

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=77954819069&partnerID=8YFLogxK

U2 - 10.1007/s10948-010-0663-6

DO - 10.1007/s10948-010-0663-6

M3 - Journal article

AN - SCOPUS:77954819069

VL - 23

SP - 807

EP - 810

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 5

ER -