2002/07/07 by S. Kos, Šimon Kos, Andrew J. Millis +5 · 4 citations
Engineering · Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Strongly Correlated Electrons (cond-mat.str-el) #Superconducting Materials and Applications #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0207190
New author added. Incorrect calculations of previous version corrected and conclusions revised Rev 2: New references added, minor misprints corrected
openalex publication_date 2002/07/07 · arxiv created 2004/09/30 · arxiv updated 2009/11/30 · openalex created_date 2017/04/07 · openalex updated_date 2026/08/01
The leading (Gaussian) fluctuation correction to the weak coupling zero temperature BCS superconducting gap equation is computed. We find that the dominant contribution comes from the high energies and momenta (compared to the gap) and gives a correction smaller by the weak-coupling factor gN0 than the mean-field terms. This correction is small due to cancellation of singular contributions from the amplitude and phase mode at high energies and momenta.