Ultra-low-temperature cooling of two-dimensional electron gas

Authors
Xia, JS Adams, ED Shvarts, V Pan, W Stormer, HL Tsui, DC
Citation
Js. Xia et al., Ultra-low-temperature cooling of two-dimensional electron gas, PHYSICA B, 280(1-4), 2000, pp. 491-492
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
280
Issue
1-4
Year of publication
2000
Pages
491 - 492
Database
ISI
SICI code
0921-4526(200005)280:1-4<491:UCOTEG>2.0.ZU;2-Z
Abstract
A new design has been used for cooling GaAs/AlxGa1-xAs sample to ultra-low- temperatures. The sample, with electrical contacts directly soldered to the sintered silver powder heat exchangers, was immersed in liquid He-3, which was cooled by a PrNI5 nuclear refrigerator. The data analysis shows that t he two-dimensional electron gas (2DEG) was cooled to 4.0 mK at the refriger ator base temperature T-b of 2.0 mK. The design with heat exchanger cooling is applicable to any ultra-low-temperature transport measurements of 2DEG system. (C) 2000 Published by Elsevier Science B.V. All rights reserved.