Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Scaling, finite size effects, and crossovers of the resistivity and current-voltage characteristics in two-dimensional superconductors
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Statistisk fysik.
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Statistisk fysik.ORCID-id: 0000-0002-9881-7857
2013 (Engelska)Ingår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 87, nr 22, s. 224506-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We revisit the scaling properties of the resistivity and the current-voltage characteristics at and below the Berezinskii-Kosterlitz-Thouless transition, both in zero and nonzero magnetic fields. The scaling properties are derived by integrating the renormalization group flow equations up to a scale where they can be reliably matched to simple analytic expressions. The vortex fugacity turns out to be dangerously irrelevant for these quantities below T-c, thereby altering the scaling behavior. We derive the possible crossover effects as the current, magnetic field, or system size is varied, and find a strong multiplicative logarithmic correction near T-c, all of which is necessary to account for when interpreting experiments and simulation data. Our analysis clarifies a longstanding discrepancy between the finite size dependence found in many simulations and the current-voltage characteristics of experiments. We further show that the logarithmic correction can be avoided by approaching the transition in a magnetic field, thereby simplifying the scaling analysis. We confirm our results by large-scale numerical simulations, and calculate the dynamic critical exponent z, for relaxational Langevin dynamics and for resistively and capacitively shunted Josephson junction dynamics.

Ort, förlag, år, upplaga, sidor
American Physical Society , 2013. Vol. 87, nr 22, s. 224506-
Nyckelord [en]
Josephson-Junction Arrays, Iv Characteristics, Phase-Transitions, Coulomb Gas, Xy Models, Dynamics, Films, Exponent
Nationell ämneskategori
Fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-124725DOI: 10.1103/PhysRevB.87.224506ISI: 000320604800004Scopus ID: 2-s2.0-84879710351OAI: oai:DiVA.org:kth-124725DiVA, id: diva2:638354
Forskningsfinansiär
Vetenskapsrådet, 621-2007-5138
Anmärkning

QC 20130730

Tillgänglig från: 2013-07-30 Skapad: 2013-07-29 Senast uppdaterad: 2017-12-06Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Personposter BETA

Lidmar, Jack

Sök vidare i DiVA

Av författaren/redaktören
Andersson, AndreasLidmar, Jack
Av organisationen
Statistisk fysik
I samma tidskrift
Physical Review B. Condensed Matter and Materials Physics
Fysik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 308 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf