Consiglio Nazionale Delle Ricerche

University of Rochester

Consejo Superior De Investigaciones Cientificas

Universidad Del País Vasco/euskal Herriko Unibertsitatea

University of Jyväskylä

Universidad Del País Vasco (upv)

Universidad Del País Vasco

Francesco Giazotto

Andrew Jordan

Ilari Maasilta

Fernando Sebastian Bergeret Sbarbaro

Elia Strambini

Sreenath K Manikandan

F Sebastian Bergeret Sbarbaro

Giorgio De Simoni

Tero Heikkilä

An electromagnetic sensor for use in a variety of applications requiring extremely high sensitivity, such as measuring power and characteristics of incident electromagnetic radiation includes a superconducting layer that carries an exchange field for providing a spin splitting effect of charge carriers in the superconducting layer, a metal electrode, and an insulating layer arranged between the superconducting layer and metal electrode to form a spin filter junction therebetween. The electromagnetic sensor provides an antenna including a wave collecting element, in contact with the superconducting layer to convey thereinto external electromagnetic waves that are generated by an external source. An electric measurement device provides an output signal responsive to the amplitude and frequency of the external electromagnetic waves, and contacts the metal electrode to measure an electric current or voltage caused by the spin splitted charge carrier flow from the superconducting layer through the spin filter junction into the metal electrode.

Superconducting electromagnetic wave sensor

A heat transfer device and method are disclosed. The device includes a working region (i.e., working substance) made from a first superconducting material having a superconducting state and a normal state when magnetized. The first superconducting material has a first energy gap while in the superconducting state. A substrate (i.e., cold reservoir) is connected to the working region at a first tunnel junction. The substrate may be a metallic substrate. A heat sink (i.e., hot reservoir) is connected to the working region at a second tunnel junction. The heat sink is made from a second superconducting material having a second energy gap that is larger than the first energy gap. In a particular example, the heat transfer device includes a metallic substrate is made from Copper, a working region made from Tantalum, a heat sink made from Niobium, and the first and second tunnel junctions are made from Tantalum Oxide.

Systems and methods for superconducting quantum refrigeration

A superconducting logic element includes a superconducting tunnel junction including first and second superconductors. First and second insulating ferromagnets in contact with the first and second superconductors, respectively, generate by magnetic proximity effect a predetermined density of spin-split states in the first and second superconductors, respectively. A writing element applies a writing current to at least a superconductor and is in contact with one of the first or second insulating ferromagnets, so that the first and second insulating ferromagnets commute, by the magnetic field generated by the applied writing current, between a state with parallel magnetization to a state with antiparallel magnetization with respect to each other. The superconducting tunnel junction includes the first or second superconductor between which an insulating layer is arranged with tunnel barrier function, the insulating layer selected between a layer selected from the group consisting of AlOx, AlN, and the first or second insulating ferromagnet.

Superconducting logic element

Growing community of inventors

Pisa, Italy

Francesco Giazotto