TY - JOUR
T1 - Shot noise induced by nonequilibrium spin accumulation
AU - Arakawa, Tomonori
AU - Shiogai, Junichi
AU - Ciorga, Mariusz
AU - Utz, Martin
AU - Schuh, Dieter
AU - Kohda, Makoto
AU - Nitta, Junsaku
AU - Bougeard, Dominique
AU - Weiss, Dieter
AU - Ono, Teruo
AU - Kobayashi, Kensuke
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/7/7
Y1 - 2015/7/7
N2 - When an electric current passes across a potential barrier, the partition process of electrons at the barrier gives rise to the shot noise, reflecting the discrete nature of the electric charge. Here we report the observation of excess shot noise connected with a spin current which is induced by a nonequilibrium spin accumulation in an all-semiconductor lateral spin-valve device. We find that this excess shot noise is proportional to the spin current. Additionally, we determine quantitatively the spin-injection-induced electron temperature by measuring the current noise. Our experiments show that spin accumulation driven shot noise provides a novel means of investigating nonequilibrium spin transport.
AB - When an electric current passes across a potential barrier, the partition process of electrons at the barrier gives rise to the shot noise, reflecting the discrete nature of the electric charge. Here we report the observation of excess shot noise connected with a spin current which is induced by a nonequilibrium spin accumulation in an all-semiconductor lateral spin-valve device. We find that this excess shot noise is proportional to the spin current. Additionally, we determine quantitatively the spin-injection-induced electron temperature by measuring the current noise. Our experiments show that spin accumulation driven shot noise provides a novel means of investigating nonequilibrium spin transport.
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U2 - 10.1103/PhysRevLett.114.016601
DO - 10.1103/PhysRevLett.114.016601
M3 - Article
AN - SCOPUS:84921048187
VL - 114
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 1
M1 - 016601
ER -