Journal
PHYSICAL REVIEW B
Volume 106, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.155419
Keywords
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Funding
- French National Research Agency (ANR)
- [ANR-20-CE30-0028]
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We theoretically study a strongly disordered superconducting layer heated by near-field microwave radiation from a nanometric metallic tip. We propose using this as a local probe to access different physics, such as mapping out inhomogeneous superfluid flow in the layer.
We theoretically study a strongly disordered superconducting layer heated by near-field microwave radiation from a nanometric metallic tip. The microwaves heat up the quasiparticles, which cool by phonon emission and conduction away from the heated area. Due to a bistability with two stable states of the electron temperature under the tip, the heating can be tuned to induce a submicrometer-sized normal region bounded by a sharp domain wall between high- and low-temperature states. We propose this as a local probe to access different physics from existing methods, for example, to map out inhomogeneous superfluid flow in the layer. The bistability-induced domain wall can significantly improve its spatial resolution.
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