Collective modes in disordered s-wave superconductors
ORAL
Abstract
We investigate the effect of disorder and temperature on the two particle spectral function for s-wave superconductors, focusing on the evolution of the low energy collective Higgs and phase modes. We find that disorder creates a subgap Higgs mode and flattens the Goldstone mode. In the presence of weak disorder, the Higgs mode remains spectrally separated from phase modes for a large range of temperature, thereby making it a possible candidate to observe in energy resolved spectroscopies.
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Presenters
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Abhisek Samanta
Physics, Technion
Authors
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Abhisek Samanta
Physics, Technion
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Anirban Das
Physics, Tata Institute of Fundamental Research
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Nandini Trivedi
Ohio State Univ - Columbus, The Ohio State University, Physics, The Ohio State University, Department of Physics, Ohio State Univ - Columbus
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Rajdeep Sensarma
Physics, Tata Institute of Fundamental Research, Department of Theoretical Physics, Tata Institute of Fundamental Research (TIFR), Tata Institute of Fundamental Research (TIFR), Department of Theoretical Physics, Tata Institute of Fundamental Research