Giant Microwave Absorption in d-Wave Superconductors
ORAL
Abstract
We discuss a new mechanism of microwave absorption in d-wave superconductors which arises in the presence of a dc supercurrent. This mechanism produces a contribution to the ac conductivity that is proportional to the inelastic quasiparticle relaxation time and determines the supercurrent dependence of the conductivity. This new contribution may also be much larger than the conventional contribution because, in superconductors, the inelastic relaxation time typically exceeds the elastic one by several orders of magnitude. We show that the calculation of the aforementioned contribution to the conductivity can be reduced to the calculation of the single particle density of states in the presence of a dc supercurrent. Our results may enable determination of the inelastic relaxation time in superconductors from microwave absorption measurements.
*The work of A.A. and M.S. was supported by the U.S. Department of Energy Office of Science, Basic Energy Sciences under Award No. DE-FG02-07ER46452 and by the NSF grant MRSEC DMR-1719797. The work of B.S. was funded in part by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4302 and GBMF8686.
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Presenters
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Michael Smith
- University of Washington