Quantum dot thermometry at ultra-low temperature in a dilution refrigerator with a 4He immersion cell

被引：7

作者：

Nicoli, G. ^{[1
]}

Marki, P. ^{[1
]}

Bram, B. A. ^{[1
]}

Roosli, M. P. ^{[1
]}

Hennel, S. ^{[1
]}

Hofmann, A. ^{[1
]}

Reichl, C. ^{[1
]}

Wegscheider, W. ^{[1
]}

Ihn, T. ^{[1
]}

Ensslin, K. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Solid State Phys Lab, Otto Stern Weg 1, CH-8093 Zurich, Switzerland

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2019年 / 90卷 / 11期

关键词：

ELECTRON; PHYSICS; SUPERCONDUCTIVITY; QUANTIZATION; TRANSPORT; COULOMB;

D O I：

10.1063/1.5127830

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Experiments performed at a temperature of a few millikelvins require effective thermalization schemes, low-pass filtering of the measurement lines, and low-noise electronics. Here, we report on the modifications to a commercial dilution refrigerator with a base temperature of 3.5 mK that enable us to lower the electron temperature to 6.7 mK measured from the Coulomb peak width of a quantum dot gate-defined in an [Al]GaAs heteostructure. We present the design and implementation of a liquid He-4 immersion cell tight against superleaks, implement an innovative wiring technology, and develop optimized transport measurement procedures. Published under license by AIP Publishing.

引用

页数：9

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