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Shot Noise Suppression in a Quantum Point Contact with Short Channel Length

Title
Shot Noise Suppression in a Quantum Point Contact with Short Channel Length
Author
정희준
Keywords
DIMENSIONAL ELECTRON-GAS; QUANTIZED CONDUCTANCE; SPIN POLARIZATION; HETEROSTRUCTURE; LOCALIZATION; TEMPERATURE; DEPENDENCE; TRANSPORT; DEVICES; BIAS
Issue Date
2015-07
Publisher
IOP PUBLISHING LTD
Citation
CHINESE PHYSICS LETTERS, v. 32, No. 7
Abstract
An experimental study on the current shot noise of a quantum point contact with short channel length is reported. The experimentally measured maximum energy level spacing between the ground and the first excited state of the device reached up to 7.5 meV, probably due to the hard wall confinement by using shallow electron gas and sharp point contact geometry. The two-dimensional non-equilibrium shot noise contour map shows noise suppression characteristics in a wide range of bias voltage. Fano factor analysis indicates spin-polarized transport through a short quantum point contact.
URI
http://iopscience.iop.org/article/10.1088/0256-307X/32/7/077301/metahttp://hdl.handle.net/20.500.11754/36378
ISSN
1741-3540; 0256-307X
DOI
10.1088/0256-307X/32/7/077301
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > APPLIED PHYSICS(응용물리학과) > Articles
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