Archivio istituzionale della ricerca della Scuola Normale Superiore
IRIS SNS è l'archivio istituzionale destinato a raccogliere, conservare e diffondere ad accesso aperto la produzione scientifica degli autori afferenti alla Scuola Normale Superiore.
EnglishCoherent caloritronics, the thermal counterpart of coherent electronics, has drawn growing attention since the discovery of heat interference in 2012. Thermal interferometers, diodes, transistors and nano-valves have been theoretically proposed and experimentally demonstrated by exploiting the quantum phase difference between two superconductors coupled through a Josephson junction. So far, the quantum-phase modulator has been realized in the form of a superconducting quantum interference device (SQUID) or a superconducting quantum interference proximity transistor (SQUIPT). Thence, an external magnetic field is necessary in order to manipulate the heat transport. Here, we theoretically propose the first on-chip fully thermal caloritronic device: the phase-tunable temperature amplifier (PTA). Taking advantage of a recently discovered thermoelectric effect in spin-split superconductors coupled to a spin-polarized system, we generate the magnetic flux controlling the transport through a temperature-biased SQUIPT by applying a temperature gradient. We simulate the behavior of the device and define a number of figures of merit in full analogy with voltage amplifiers. Notably, our architecture ensures almost infinite input thermal impedance, maximum gain of about 11 and efficiency reaching the 95%. This concept paves the way for applications in radiation sensing, thermal logics and quantum information.
| Titolo: | Phase-tunable temperature amplifier | |
| Autori: | ||
| Data di pubblicazione: | 2017 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1209/0295-5075/118/68004 | |
| Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia | |
| Handle: | http://hdl.handle.net/11384/110034 | |
| Appare nelle tipologie: |
File in questo prodotto:
Copyright © 2022