| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Shot Noise Suppression in a Quantum Point Contact with Short Channel Length |
| JEONG Heejun** |
| Department of Applied Physics, Hanyang University, Ansan 426-791, Korea |
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| Cite this article: |
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JEONG Heejun 2015 Chin. Phys. Lett. 32 077301 |
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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.
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Received: 17 February 2015
Published: 30 July 2015
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| PACS: |
73.23.-b
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(Electronic transport in mesoscopic systems)
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72.70.+m
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(Noise processes and phenomena)
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