Interfacial Engineering of Semiconductor-Superconductor Junctions for High Performance Micro-Coolers.

ABSTRACT: The control of electronic and thermal transport through material interfaces is crucial for numerous micro and nanoelectronics applications and quantum devices. Here we report on the engineering of the electro-thermal properties of semiconductor-superconductor (Sm-S) electronic cooler junctions by a nanoscale insulating tunnel barrier introduced between the Sm and S electrodes. Unexpectedly, such an interface barrier does not increase the junction resistance but strongly reduces the detrimental sub-gap leakage current. These features are key to achieving high cooling power tunnel junction refrigerators, and we demonstrate unparalleled performance in silicon-based Sm-S electron cooler devices with orders of magnitudes improvement in the cooling power in comparison to previous works. By adapt

SUBMITTER: Gunnarsson D 

PROVIDER: S-EPMC4665018 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature