Variety of c -Axis Collective Excitations in Layered Multigap Superconductors
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Ota, Yukihiro↗
Engineering topics
Koyama, Tomio
Publications and source records attributed to Koyama, Tomio.
Collective modes in multiband superfluids and superconductors: Multiple dynamical classes
One important way to characterize the states having a gauge symmetry spontaneously broken over multibands is to look at their collective excitation modes. We find that a three-band system has multiple Leggett modes with significantly different masses, which can be classified into different dynamical classes according to whether multiple interband Josephson currents add or cancel. This provides a way to dynamically characterize multiband superconductivity while the pairing symmetry is a static property.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗