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Response of a superconductor NbSe 2 flake to magnetic field detected with small tunnel junctions

Hoshi, Naoki ; Inoue, Dai ; Sonoda, Hiroki ; Yabe, Daisuke ; Tomori, Hikari ; Kanda, Akinobu

Journal of physics. Conference series, 2019-09, Vol.1293 (1), p.12016 [Periódico revisado por pares]

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Título:
Response of a superconductor NbSe 2 flake to magnetic field detected with small tunnel junctions
Autor: Hoshi, Naoki ; Inoue, Dai ; Sonoda, Hiroki ; Yabe, Daisuke ; Tomori, Hikari ; Kanda, Akinobu
É parte de: Journal of physics. Conference series, 2019-09, Vol.1293 (1), p.12016
Descrição: Abstract We have experimentally studied response of a superconductor NbSe 2 flake to perpendicular magnetic fields using small tunnel junctions. The NbSe 2 film (lateral size ∼ several μ m, thickness ∼ 50 nm) was obtained using the mechanical exfoliation of a bulk crystal and was transfered on top of predefined Au electrodes, forming an Au/NbSe 2 /Au double SIN tunnel junction system. At 4.2 K, between the lower and upper critical fields ( H C 1 and H C 2 ), the voltage of the Au/NbSe 2 /Au structure under constant current of 1 μ A exhibited random-telegraph-noise-like fluctuations as a function of the magnetic field which was applied perpendicular to the NbSe 2 flake. The origin of the voltage fluctuations is discussed.
Idioma: Inglês

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