Low-Frequency Imaginary Impedance at the Superconducting Transition of 2H - NbSe2
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2020-05-18Citation
10.1103/PhysRevApplied.13.054040
Physical Review Applied 13.5 (2020): 054040
ISSN
2331-7019 (online)DOI
10.1103/PhysRevApplied.13.054040Editor's Version
https://doi.org/10.1103/PhysRevApplied.13.054040Subjects
Integral Field Unit; Detector; Bolometers; FísicaRights
© American Physical SocietyAbstract
The superconducting transition leads to a sharp resistance drop in a temperature interval that can be a small fraction of the critical temperature Tc. A superconductor exactly at Tc is thus very sensitive to all kinds of thermal perturbation, including the heat dissipated by the measurement current. We show that the interaction between electrical and thermal currents leads to a sizable imaginary impedance at frequencies of the order of tens of hertz at the resistive transition of single crystals of the layered material 2H-NbSe2. We explain the result using models developed for transition-edge sensors. By measuring under magnetic fields and at high currents, we find that the imaginary impedance is strongly influenced by the heat associated with vortex motion and out-of-equilibrium quasiparticles
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Google Scholar:Perconte, David
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Mañas-Valero, Samuel
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Coronado, Eugenio
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Guillamón Gómez, Isabel
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Suderow Rodríguez, Hermann Jesús
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