TY - JOUR
T1 - Shot noise suppression in InGaAs/InGaAsP quantum channels
AU - Nishihara, Yoshitaka
AU - Nakamura, Shuji
AU - Kobayashi, Kensuke
AU - Ono, Teruo
AU - Kohda, Makoto
AU - Nitta, Junsaku
N1 - Funding Information:
This work is partially supported by JSPS Funding Program for Next Generation World-Leading Researchers.
PY - 2012/5/14
Y1 - 2012/5/14
N2 - We have measured the shot noise in a quantum point contact (QPC) fabricated by using InGaAs/InGaAsP heterostructure, whose conductance can be electrically tuned by the gate voltages. The reduced shot noise is observed when the QPC conductance equals to N(2e 2/h) (N = 4, 5, and 6), which is the direct experimental evidence of the coherent quantized channel formation in the QPC. The deviation of the observed Fano factor from the theory is explained by the electron heating effect generated at the QPC.
AB - We have measured the shot noise in a quantum point contact (QPC) fabricated by using InGaAs/InGaAsP heterostructure, whose conductance can be electrically tuned by the gate voltages. The reduced shot noise is observed when the QPC conductance equals to N(2e 2/h) (N = 4, 5, and 6), which is the direct experimental evidence of the coherent quantized channel formation in the QPC. The deviation of the observed Fano factor from the theory is explained by the electron heating effect generated at the QPC.
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U2 - 10.1063/1.4718934
DO - 10.1063/1.4718934
M3 - Article
AN - SCOPUS:84861802077
SN - 0003-6951
VL - 100
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 20
M1 - 203111
ER -