Abstract
We investigate excitation modes in multi-gap superconductors. Multi-gap superconductors have multiple excitation modes. In particular, the Nambu-Goldstone mode , Leggett mode and Higgs modes are important and play an important role in multi-gap superconductors. The multiple-phase invariance in a multi-gap system is partially or totally spontaneously broken in a superconductor. We evaluate the dispersion relation and the mass formulas of these modes by using the functional-integral method. The broken multiple-phase invariance leads to a new quantum phase such as the time-reversal symmetry breaking , the emergence of massless modes and fractionally quantized-flux vortices. There is a possibility that half-flux vortices exist in a two-component superconductor in magnetic field .
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
