Pekola Jukka P, Giazotto Francesco, Saira Olli-Pentti
Low Temperature Laboratory, Helsinki University of Technology, PO Box 3500, 02015 TKK, Finland.
Phys Rev Lett. 2007 Jan 19;98(3):037201. doi: 10.1103/PhysRevLett.98.037201. Epub 2007 Jan 16.
We propose a cyclic refrigeration principle based on mesoscopic electron transport. Synchronous sequential tunneling of electrons in a Coulomb-blockaded device, a normal metal-superconductor single-electron box, results in a cooling power of approximately k(B)T x f at temperature T over a wide range of cycle frequencies f. Electrostatic work, done by the gate voltage source, removes heat from the Coulomb island with an efficiency of approximately k(B)T/Delta, where Delta is the superconducting gap parameter. The performance is not affected significantly by nonidealities, for instance by offset charges. We propose ways of characterizing the system and of its practical implementation.
我们提出了一种基于介观电子输运的循环制冷原理。在一个库仑阻塞器件（即一个正常金属 - 超导体单电子盒）中，电子的同步顺序隧穿在很宽的循环频率f范围内，于温度T下产生约为k(B)T×f的制冷功率。由栅极电压源完成的静电功以约k(B)T/Δ的效率从库仑岛移除热量，其中Δ是超导能隙参数。该性能不会受到诸如偏移电荷等非理想因素的显著影响。我们提出了表征该系统及其实际应用的方法。
