Proximity nanovalve with large phase-tunable thermal conductance

被引:21
作者
Strambini, E. [1 ,2 ]
Bergeret, F. S. [3 ,4 ,5 ]
Giazotto, F. [1 ,2 ]
机构
[1] CNR, NEST Ist Nanosci, I-56127 Pisa, Italy
[2] Scuola Normale Super Pisa, I-56127 Pisa, Italy
[3] Ctr Mixto CSIC UPV EHU, Ctr Fis Mat CFM MPC, E-20018 San Sebastian, Spain
[4] DIPC, E-20018 San Sebastian, Spain
[5] Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26111 Oldenburg, Germany
基金
欧洲研究理事会;
关键词
Heat flux;
D O I
10.1063/1.4893759
中图分类号
O59 [应用物理学];
学科分类号
摘要
We propose a phase-controlled heat-flux quantum valve based on the proximity effect driven by a superconducting quantum interference proximity transistor (SQUIPT). Its operation relies on the phase-dependent quasiparticle density of states in the Josephson weak-link of the SQUIPT which controls thermal transport across the device. In a realistic Al/Cu-based setup the structure can provide efficient control of thermal current inducing temperature swings exceeding similar to 100 mK, and flux-to-temperature transfer coefficients up to similar to 500 mK/Phi(0) below 100 mK. The nanovalve performances improve by lowering the bath temperature, making the proposed structure a promising building-block for the implementation of coherent caloritronic devices operating below 1K. (C) 2014 AIP Publishing LLC.
引用
收藏
页数:5
相关论文
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