• Title/Summary/Keyword: spin-orbit interaction

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Electrical Spin Transport in n-Doped In0.53Ga0.47As Channels

  • Park, Youn-Ho;Koo, Hyun-Cheol;Kim, Kyung-Ho;Kim, Hyung-Jun;Han, Suk-Hee
    • Journal of Magnetics
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    • v.14 no.1
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    • pp.23-26
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    • 2009

  • Spin injection from a ferromagnet into an n-doped $In_{0.53}Ga_{0.47}As$ channel was electrically detected by a ferromagnetic detector. At T = 20 K, using non-local and local spin-valve measurements, a non-local signal of $2\;{\mu}V$ and a local spin valve signal of 0.041% were observed when the bias current was 1 mA. The band calculation and Shubnikov-de Haas oscillation measurement in a bulk channel showed that the gate controlled spin-orbit interaction was not large enough to control the spin precession but it could be a worthy candidate for a logic device using spin accumulation and diffusion.

  • https://doi.org/10.4283/JMAG.2009.14.1.023 인용 PDF KSCI

Magnetism in α-RuCl3 : Dependence on Coulomb Interaction and Hund's Coupling

  • Gong, Hoshin;Kim, Kyoo;Ji, Sungdae;Kim, Bongjae;Min, B.I.
    • Journal of the Korean Physical Society
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    • v.73 no.11
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    • pp.1691-1697
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    • 2018

  • Employing the density functional theory, we have investigated the roles of Coulomb and Hund's interactions in the electronic and magnetic properties of newly discovered ${\alpha}-RuCl_3$ having the $R{\overline{3}}$ symmetry, which is in close proximity of the Kitaev system. We show that both the size and the direction of local magnetic moment are highly dependent on Coulomb and Hund's interactions, and the spin and orbital parts show different behaviors. The validity of the so-called $j^{eff}$ picture is accessed upon interaction parameters, and the explicit roles of Hund's interaction in the local electronic structures and magnetic properties are discussed.

  • https://doi.org/10.3938/jkps.73.1691 인용 KSCI

Charge and Orbital Ordering and Spin State Transition Driven by Structural Distortion in YBaCo_20_5 (YBaCo_20_5 화합물에서의 구조변형에 의한 전하, 궤도, 스핀상태 전이 연구)

  • Se Kyun Kwon;Jin Ho Park;Byung II Min
    • Proceedings of the Korean Magnestics Society Conference
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    • 2000.09a
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    • pp.461-461
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    • 2000

  • We have investigated electronic structuresof antiferromagnetic YBaCo_2O_5 using the local spin-density approximation (LSDA) + U method. The charge and orbital ordered insulating ground state is correctly obtained with the strong on-site Coulomb interaction. Co^{2+} and Co^{3+} ions are found to be in the high spin (HS) and intermediate spin (IS) state, respectively. The tetragonal to orthorhombic structural transition is responsible for the ordering phenomena and the spin states of Co ions. The large contribution of the orbital moment to the total magnetic moment indicates that the effect of the spin-orbit coupling is very important in YBaCo_2O_5.

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Electronic and Magnetic Structures of Ba2MReO6 (M=Mn, Fe, Co, and Ni)

  • Park, J.H.;Kwon, S.K.;Min, B.I.
    • Journal of Magnetics
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    • v.12 no.2
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    • pp.64-67
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    • 2007

  • Electronic structures of ordered double perovskites $Ba_2MReO_6$ (M=Mn, Fe, Co, and Ni) are investigated by using the linearized muffin-tin orbitals band method in the local spin-density approximation (LSDA) and the LSDA+U method. The half-metallic ferrimagnetic ground states are obtained for M=Fe and Ni in the LSDA+U, whereas the insulating ground state is obtained for M=Mn in the LSDA+U incorporating the spinorbit interaction. For M= Co, the antiferromagnetic ground state is stabilized in the LSDA+U by invoking the structural distortion.

  • https://doi.org/10.4283/JMAG.2007.12.2.064 인용 PDF KSCI