@Article{Granato:2021:MaFrCh,
               author = "Granato, Enzo",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Magnetic-field frustration and chiral-glass to insulator 
                         transition in superconducting arrays with random \π 
                         junctions",
              journal = "European Physical Journal B",
                 year = "2021",
               volume = "94",
               number = "7",
                pages = "e143",
                month = "July",
             abstract = "ABSTRACT: We study the effects of random \π Josephson 
                         junctions and applied magnetic field on the quantum phase 
                         transitions of superconducting arrays, described by a 
                         two-dimensional phase-glass model. The zero-temperature phase 
                         diagram and critical behavior are obtained from path-integral 
                         Monte Carlo simulations. A superconducting chiral-glass phase 
                         occurs for sufficiently large disorder resulting from frustration 
                         effects of the \π junctions. Unlike the 
                         superconductorinsulator transition for weak disorder, the 
                         chiral-glass to insulator transition is insensitive to additional 
                         frustration introduced by an external magnetic field corresponding 
                         to half flux quantum per plaquette. The results are consistent 
                         with recent measurements on superconducting thin films with a 
                         periodic pattern of nanoholes in an applied magnetic field and 
                         doped with magnetic impurities. The magnetic-field frustration 
                         effects for the activation energy at low doping and its 
                         disappearance at higher doping, observed experimentally, is 
                         indicative of a transition to the chiral-glass regime. Graphic 
                         abstract: [Figure not available: see fulltext.].",
                  doi = "10.1140/epjb/s10051-021-00162-3",
                  url = "http://dx.doi.org/10.1140/epjb/s10051-021-00162-3",
                 issn = "1434-6028",
             language = "en",
           targetfile = "granato_magnetic_2021.pdf",
        urlaccessdate = "29 jun. 2024"
}