Fluctuation effects in phase-frustrated multiband superconductors

• DOI: 10.48550/arxiv.1407.0711
• Publication Date: 2014-01-01
• Authors: Troels Arnfred Bo...; Asle Sudbø
• Keywords: Mean field theory

We compare the phase-diagrams of an effective theory a three-dimensional multi-band superconductor obtained within standard and cluster mean-field theories, in large-scale Monte Carlo simulations. In three dimensions, mean field fails locating correctly positions phase transitions, as well character transitions between different states. A calculations taking into account order-parameter fluctuations local environment improves results considerably for case extreme type-II superconductors where gauge-field are negligible. The large multi-component superconducting order parameter originate with strong frustration due to interband Josephson-couplings. novel chiral metallic found previous works using scale Monte-Carlo computations, is not either single-site or improved fluctuations. superconductors, this unusual originates