Work

Cascade Electronic Refrigerator Using Superconducting Tunnel Junctions

Year: 2016

Type: article

Abstract: Solid-state microrefrigerators operating in the subkelvin regime are key to quantum technology. An electronic cooler based on a normal-metal/insulator/superconductor ($N\phantom{\rule{0}{0ex}}I\phantom{\rule{0}{0ex}}S$) tunnel junction works well in principle, but typically its $S$ electrodes are severely overheated and performance sags---especially in the powerful devices needed for applications. The authors use a second $N\phantom{\rule{0}{0ex}}I\phantom{\rule{0}{0ex}}S$ cooling stage to thermalize the hot superconductor at the back side of the main cooler. This cascade design could also manage heat in other cryo-electronic devices.

Source: Physical Review Applied

DOI: 10.1103/physrevapplied.6.054011

Authors: H. Q. Nguyen, J. T. Peltonen, M. Meschke, J. P. Pekola

Institutions: Vietnam National University, Hanoi, VNU University of Science, Aalto University

Language: English

Topic: Superconducting and THz Device Technology

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Academy of Finland, Aalto-Yliopisto

Awards: G3691162349, G7056366131