Single-hole pump in germanium
Single-hole pump in germanium
复制标题
锗单孔泵
DOI:
10.1088/1361-6463/ac181d
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Rossi A
中科院分区:
文献类型:
--
作者:
Rossi A
Single-charge pumps are the main candidates for quantum-based standards of the unit ampere because they can generate accurate and quantized electric currents. In order to approach the metrological requirements in terms of both accuracy and speed of operation, in the past decade there has been a focus on semiconductor-based devices. The use of a variety of semiconductor materials enables the universality of charge pump devices to be tested, a highly desirable demonstration for metrology, with GaAs and Si pumps at the forefront of these tests. Here, we show that pumping can be achieved in a yet unexplored semiconductor, ie germanium. We realise a single-hole pump with a tunable-barrier quantum dot electrostatically defined at a Ge/SiGe heterostructure interface. We observe quantized current plateaux by driving the system with a single sinusoidal drive up to a frequency of 100 MHz. The operation of the prototype was affected by accidental formation of multiple dots, probably due to disorder potential, and random charge fluctuations. We suggest straightforward refinements of the fabrication process to improve pump characteristics in future experiments.
登录
查看更多内容
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Vartiainen;M. Mottonen;J. Pekola;A. Kemppinen
通讯作者:
A. Kemppinen
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
A. Niskanen;A. Niskanen;J. Kivioja;H. Seppä;J. Pekola
通讯作者:
J. Pekola
DOI:
--
发表时间:
2018
期刊:
Nano letters (Print)
影响因子:
--
作者:
A. Rossi;J. Klochan;J. Timoshenko;F. Hudson;M. Möttönen;S. Rogge;A. Dzurak;Vyacheslavs Kashcheyevs;G. Tettamanzi
通讯作者:
G. Tettamanzi
影响因子:
16.6
作者:
通讯作者:
--
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
G. Yamahata;K. Nishiguchi;A. Fujiwara
通讯作者:
A. Fujiwara