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||1078768|
|465||<3/28> 양자물리학의 성립 과정||2012.03.22||72904|
|464||<2/7>Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking||2013.02.06||72910|
|463||<9/22(Thu.) 10:30> Bulk-boundary correspondence from the inter-cellular Zak phase||2016.08.29||72950|
|462||<5/9> Searching for 5th dimension||2012.05.03||73218|
|461||<5/1> Supersymmetry Breaking in Chern-Simons-matter Theories||2012.04.30||73219|
|460||<7/2> Dyonic Instanton and Its Higgs Structures||2008.07.01||73224|
|459||<Sep. 16(Wed.) 4:30 PM> Watching molecular targets in living bodies: the cutting edge in clinical medicine||2015.09.09||73331|
|458||<11/20> 마침내 발견된 신의 입자: 힉스 보존||2013.11.14||73333|
|457||<6/1> 암흑물질 탐색||2007.05.28||73368|
|456||<March. 16(Wed.) 4:30 PM> 초고속반도체의 블랙다이아몬드™,low-k||2016.03.10||73923|
|455||<6/3(수) 오후4:30분> The Quest for Dark Matter: Discovering Its Nature Underground?||2015.05.28||74262|
|454||<4/24> How to introduce the monopole in quantum mechanics?||2012.04.23||74393|
|453||<9/7> On Dark Matter and its indirect detection with box-shaped gamma-rays||2012.09.05||74393|
|452||<11/24>생물계의 물리학적 연구: 단분자 생물물리학과 세포 역학 연구||2006.11.21||74458|
|451||<7/12(Tue.) 11:00> Spin-direction-dependent magnetoelastic coupling on MnO, CoO, and NiO||2016.07.01||74797|
|450||THINKING PHYSICS 발표회||2009.03.16||74799|
|449||<Nov. 25(Wed.) 4:30 PM> Present and Future of OLED||2015.11.19||74825|
|448||<12/6(Fri.)>topological phase transitions in Kitaev quantum spin liquids.||2019.12.04||74859|
|447||<3/30> Extreme Energy, Extreme Universe (Search for Ultra High Energy Particles in Space)||2007.03.26||74925|
|446||<4/6> Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment||2012.04.04||74995|