Anisotropy of Magnetoresistance Hysteresis around the $\nu=2/3$ Quantum Hall State in Tilted Magnetic Field
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概要
- 論文の詳細を見る
We present an anisotropy of the hysteretic transport around the spin transition point at the Landau level filling factor $\nu=2/3$ in a tilted magnetic field. When the direction of the in-plane component of the magnetic field $B_{\|}$ is normal to the probe current $I$, a strong hysteretic transport due to the current-induced nuclear spin polarization occurs. When $B_{\|}$ is parallel to $I$, on the other hand, the hysteresis almost disappears. We also demonstrate that the nuclear spin–lattice relaxation rate $T_{1}^{-1}$ at the transition point increases with decreasing angle between the directions of $B_{\|}$ and $I$. These results suggest that the morphology of electron spin domains around $\nu =2/3$ is affected by the current direction.
- 2010-12-15
著者
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Fukuda Akira
Department Of Computer Science And Communication Engineering Faculty Of Engineering Kyushu Universit
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Kumada Norio
NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan
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Iwata Kazuki
Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Morino Masayuki
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Ezawa Zyun
Theoretical Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
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Hirayama Yoshiro
Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Sawada Anju
Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8501, Japan
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