Home > 게시판 > 세미나
에피 산화물 연구실에서 Osaka University의 Jobu Matsuno 교수님을 초청하여 아래와 같이 세미나를 개최합니다.
학과 구성원 여러분의 많은 참석을 부탁 드립니다.
온라인으로 진행되는 세미나입니다.
○ Title: Oxide electronics utilizing spin-orbit coupling
○ Speaker: Prof. Jobu Matsuno (Osaka University)
○ Date/time: 2021. 6. 10 (Thu.) 10:00 - 11:30 AM
○ Abstract: A strong spin-orbit coupling (SOC) inherent to 5d electron systems recently
emerged as a new paradigm for oxide electronics. For example, we investigated novel
physics of spin-orbital Mott insulators  and possible topological insulators  by tuning
the electronic phases through superlattice technique. In this talk, we suggest that 5d Ir
oxides are promising class of spintronic materials by focusing on two topics: magnetic
skyrmion and spin current.
Magnetic skyrmion is a topological spin texture, which is promising for low-power
electronics since it can be driven by tiny current. We have studied transport properties of
SrRuO3-SrIrO3 bilayers to observe an anomaly in the Hall resistivity in addition to
anomalous Hall effect (AHE); this is attributed to topological Hall effect (THE) . The
results suggest that magnetic skyrmions of 10–20 nm are generated by the combination
of broken inversion symmetry at the interface and strong SOC of SrIrO3. Even more
surprising is that we can control both AHE and THE by electric field in the SrRuO3-SrIrO3
bilayers . The results established that strong SOC of nonmagnetic SrIrO3 is essential
in electrical tuning of these Hall effects.
Spin-current is a flow of spin angular momentum without any charge current; low-power
electronics is expected based on spin current. A charge current can be converted into a
spin current and vice versa, known as the spin Hall effect (SHE) and the inverse spin Hall
effect (ISHE). We demonstrated a large ISHE of IrO2, one of the simplest 5d oxides .
Very recently we also evidenced a large SHE of IrO2 through spin-orbit torque generation
. The results indicate that Ir oxides are promising class of spintronic materials in terms
of spin current.
 J. Matsuno et al., Phys. Rev. Lett. 114, 247209 (2015).  Y. Ohuchi et al., Nat. Commun. 9, 213 (2018).
 D. Hirai et al., APL Mater. 3, 041508 (2015).  K. Fujiwara et al., Nat. Commun. 4, 2893 (2013).
 J. Matsuno et al., Sci. Adv. 2, e1600304 (2016).  K. Ueda et al., Phys. Rev. B 102, 134432 (2020).
|공지||<12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생||2016.11.28||1091928|
|23||<May 04(Tue.)>Flat bands and the geometry of Bloch wave function||2021.04.27||81220|
|22||<June 01(Tue.)>Frustration-induced Athermal Behaviors: Hilbert Space Fragmentation and Quantum Many-Body Scars||2021.05.24||47255|
|»||<June 10(Thu.)>Oxide electronics utilizing spin-orbit coupling||2021.05.31||168369|
|20||<June 23(Wed.)>Valley Polarization and Exciton Hall Effect in Transition Metal Dichalcogenides||2021.06.22||34670|
|19||<June 30(Wed.)>Mapping of magnetic anisotropy for van der Waals materials||2021.06.25||93697|
|18||<July 7(Wed.)>Functional rare earth ionic defects and the related phenomena||2021.07.02||122780|
|17||<July 14(Wed.)> B1g phonon anomaly driven by Fermi surface instability at intermediate temperature in YBa2Cu3O7−δ||2021.07.13||47672|
|16||<July 21(Wed.)> Strongly Correlative Ionics||2021.07.19||34963|
|15||<Aug. 6(Fru.)> Gravitationally probing dark matter (DM) microphysics||2021.08.03||38627|
|14||<Aug. 4(Wed.)>Electronic Properties of Mixed-dimensional 2D/3D Heterostructures||2021.08.04||88340|
|13||<Nov. 5(Fri.)>Strongly Coupled Moire Photonics||2021.11.01||51612|
|12||<Nov. 29(Mon.)>Exploring light-matter interactions at atomic scale using electron microscopy||2021.11.22||10170|
|11||<Jan. 27(Thu.)>Emulating twisted double bilayer graphene with a multiorbital optical lattice||2022.01.18||3325|
|10||<May. 3(Tue.)>Anomalous Hall signatures of nonsymmorphic nodal lines in the doped chromium chalcospinel CuCr2Se4||2022.04.19||2621|
|9||<May. 10(Tue.)>Longitudinal magnon decay in the quasi-two-dimensional antiferromagnet in Ba2FeSi2O7||2022.05.09||2273|
|8||<July 8(Fri.)>Intertwined magnetism and charge density wave in a kagome metal||2022.06.03||1941|
|7||<Nov. 3(Thu.)>Terahertz Spectroscopy of Quantum Materials||2022.10.31||5206|
|6||<Nov. 11(Fri.)> On the origin of CDW in two-dimensional materials||2022.11.04||97|
|5||<Nov. 11(Fri.)> Nonvanishing anomalous Hall effect in Mn3Al- compensated ferrimagnetic Heusler compound||2022.11.08||104|
|4||<Nov. 21(Mon.)> Strong magneto-elastic coupling observed in ultrafast lattice dynamics of SrRuO3 based superlattices||2022.11.15||47|