Current-driven domain wall motion with spin Hall effect: Reduction of threshold current density
被引:25
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作者:
Ryu, Jisu
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Pohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, Kyungbuk, South KoreaPohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
Ryu, Jisu
[1
,2
]
Lee, Kyung-Jin
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Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea
Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 136713, South KoreaPohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
Lee, Kyung-Jin
[3
,4
]
Lee, Hyun-Woo
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Pohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, Kyungbuk, South KoreaPohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
Lee, Hyun-Woo
[1
,2
]
机构:
[1] Pohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
[2] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, Kyungbuk, South Korea
[3] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea
[4] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 136713, South Korea
We theoretically study the current-driven domain wall motion in the presence of both the spin Hall effect and an extrinsic pinning potential. The spin Hall effect mainly affects the damping ratio of the domain wall precession in the pinning potential. When the pinning potential is not too strong, this results in a significant reduction of a threshold current density for the depinning of a domain wall with certain polarity. We also propose one way to distinguish the spin Hall effect induced spin-transfer torque from the one induced by the Rashba spin-orbit coupling experimentally. (C) 2013 AIP Publishing LLC.
机构:
Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Bhowmik, Debanjan
Nowakowski, Mark E.
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Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Nowakowski, Mark E.
You, Long
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Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
You, Long
Lee, OukJae
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Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Lee, OukJae
Keating, David
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Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Keating, David
Wong, Mark
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Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Wong, Mark
Bokor, Jeffrey
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Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Bokor, Jeffrey
Salahuddin, Sayeef
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机构:
Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA USAUniv Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA