2008/06/16 by Enzo Granato
Mathematics · Physics and Astronomy · #Coherence length #Condensed matter physics #Critical exponent #Exponent #Frustration #Josephson effect #Magnetic properties of thin films #Mathematics #Monte Carlo method #Phase (matter) #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scaling #Statistical physics #Statistics #Superconductivity #Theoretical and Computational Physics #Vortex #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.027004
published as Phys. Rev. Lett. 101, 027004 (2008) · 4 pages, 4 figures, to appear in Phys. Rev. Lett
arxiv created 2008/06/16 · openalex publication_date 2008/07/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Phase coherence and vortex order in a Josephson-junction array at irrational frustration are studied by extensive Monte Carlo simulations using the parallel-tempering method. A scaling analysis of the correlation length of phase variables in the full equilibrated system shows that the critical temperature vanishes with a power-law divergent correlation length and critical exponent nuph, in agreement with recent results from resistivity scaling analysis. A similar scaling analysis for vortex variables reveals a different critical exponent nuv, suggesting that there are two distinct correlation lengths associated with a decoupled zero-temperature phase transition.