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Details of The transistor appeals to warmth

From a collaboration Italian-Finn between the investigators of the University of Helsinki and Francisco Giazotto of center NEST of the CNR-INFM the first transistor is born that works thanks to a flow of heat and not of current. Beyond that a transistor the apparatus is also a cooler, and in future could rivoluzionare the systems in order to cool nanostrutture and in order to construct ultrasensitive detectors of cancellation to employ in astronomy and telecommunicationses.

The first transistor has been realized from a team Italian-Finn that works thanks to a flow of heat and not of current. The investigators of the University of Helsinki and Francisco Giazotto of Center NEST of the INFM-CNR have put to point a device in which a potential difference them controls the flow of heat in analogous way to how much happens with the current electrical worker in the conventional transistors.

The transistor is realized using a metallic electrode and material superconductors. In the device the electrons that for effect tunnel pass through the splice between the metal and the superconductor transport the heat and solo an electron for time can cross the thin splice between metal and superconductor because of the mutual repulsione between electrons. In this way only "the more warm" electrons and therefore with greater energy can abandon the metal and generate the heat flow towards the superconductor cooling the metal.

The investigators have uncovered who the passage of heat through the transistor depends on the temperature of the metallic electrode. The device can therefore be used like a thermometer much taking care of in a position to finding millesimi of kelvin. Beyond that from transistor the device is lend to being a efficient cooler for the electronics - with upgrades them fallen back in the study of the nanostrutture, that they can be cooled in more efficient way - and it is adapted in order to construct ultrasensbili detectors to employ in satellites, radio telescopes and for the telecommunicationses.

According to Francisco Giazotto, the been involved Italian investigator in the study appeared on Physical Review Letters, this field of search deserves attention more and more. "we have moved the first steps little months ago and already today we have obtained a first working device. Even if the heat flow is still too much small for many applications, the road that we have undertaken is promising and we count to obtain turns out to you is in the study of the nanostrutture is for the realization of electronic members and coolers ".