منابع مشابه
Small-capacitance Josephson Junctions: One-dimensional Arrays and Single Junctions
Small-capacitance superconducting tunnel junctions provide an ideal system for studying the interplay between the Josephson phase and the charge on the junction electrode, which are quantum mechanically conjugate to each other. This interplay can be probed through the superconductor-insulator (SI) transition [1], which is a quantum phase transition occurring at T = 0. The SI transition has been...
متن کاملDirect observation of Josephson capacitance.
The effective capacitance has been measured in the split Cooper-pair box (CPB) over its phase-gate bias plane. Our low-frequency reactive measurement scheme allows us to probe purely the capacitive susceptibility due to the CPB band structure. The data are quantitatively explained using parameters determined independently by spectroscopic means. In addition, we show in practice that the method ...
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The flow of superfluid 3He-B through a 65 3 65 array of nanometer-size apertures has been measured recently by Backhaus et al. They find in the current-phase relation a new branch, the so-called p state. We study two limiting cases which show that the p state arises from the coupling of the phase degree of freedom to the spin-orbit rotation. The p state exists in a single large aperture, but is...
متن کاملLow-T, ramp-type Josephson junctions for SQUIDS
The Josephson tunnel junction is the basic element of a superconducting quantum interference device (SQUID). Amongst other parameters, the junction capacitance determines the characteristics of a (digital) SQUID. In a conventional dc SQUID, reducing the junction capacitance decreases the flux noise of the sensor, whereas in digital SQUIDs, the operating frequency can be increased when reducing ...
متن کاملCapacitance of Josephson junctions made on bicrystalline substrates of different geometries
M. A. Navacerrada,1,2 M. L. Lucía,2,* L. L. Sánchez-Soto,3 F. Sánchez Quesada,2 E. Sarnelli,4 and G. Testa4 1Centro de Estudios Superiores Felipe II (Universidad Complutense), C/ Capitán 39, 28300 Aranjuez (Madrid), Spain 2Departamento de Física Aplicada III (Electricidad y Electrónica), Facultad de CC. Físicas, Universidad Complutense, Avda. Complutense s/n, 28040 Madrid, Spain 3Departamento d...
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ژورنال
عنوان ژورنال: Uspehi Fiziki Metallov
سال: 2020
ISSN: 1608-1021,2617-0795
DOI: 10.15407/ufm.21.01.003