Ultra-low-temperature cooling of two-dimensional electron gas
2000; Elsevier BV; Volume: 280; Issue: 1-4 Linguagem: Inglês
10.1016/s0921-4526(99)01843-8
ISSN1873-2135
AutoresJ. S. Xia, E. D. Adams, Vladimir Shvarts, W. Pan, H. L. Störmer, D. C. Tsui,
Tópico(s)Physics of Superconductivity and Magnetism
ResumoA 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 3He, which was cooled by a PrNI5 nuclear refrigerator. The data analysis shows that the two-dimensional electron gas (2DEG) was cooled to 4.0mK at the refrigerator base temperature Tb of 2.0mK. The design with heat exchanger cooling is applicable to any ultra-low-temperature transport measurements of 2DEG system.
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