logo

korean english

게시판

Home > 게시판 > 세미나

에피 산화물연구실에서 전남대학교 물리학과 고아라 교수님과 Oak Ridge National Laboratory의 옥종목 박사님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다.

온라인으로 진행되는 Webniar(Web+Seminar)이며, Webex meetings 프로그램을 통해 진행됩니다.

===========================================================================

Date/time: 2021. 2. 18 (Thu.) 오전 11 & 오후 2




Speaker: 고아라 교수님 (전남대학교 물리학과)


time: 11:00 am


Title: Hund's metallicity in the vicinity of a Van Hove singularity


Abstract: Hund's metallicity or spin-freezing refers to strong paramagnetic fluctuations and bad metallic behavior driven by Hund's coupling in multi-orbital systems. The effect is prominent at even filling of the three-band system, relevant to ruthenate t2g systems. The low-temperature response of the Hund's metal is an intriguing topic, considering its potential relevance to superconductivity. We perform systematic dynamical mean-field calculations for a three-band model combined with electronic structures accompanying van Hove singularity, including a tight-binding Hamiltonian obtained by the density functional theory for Sr2RuO4. We find that the van Hove singularity significantly enhances Hund's metallicity at relatively low temperatures. We discuss its origin by comparing the results to the Bethe lattice counterpart.


 


Speaker: 옥종목 박사님 (Materials Science and Technology Division, Oak Ridge National Laboratory)


time: 14:00 pm


Title: Correlated topological phases in strongly correlated heterostructures


Abstract: Strong correlation, represented by unconventional superconductors, and Topology, which has started from the quantum Hall effects and developed into topological insulators, have been recognized as two most important areas in condensed matter physics for the past 50 years. Recently, two areas have begun to merge, creating new concepts such as correlated topological materials. Understanding these materials is a fundamental task to realize the future technologies including quantum computing. The most important question is how correlated electrons are affected by topology and what phenomena can emerge from their interactions. From this point of view, I aspire to find correlated materials which have topological characteristics. In this talk, I will introduce potential correlated topological phases and related phenomena found in strongly correlated heterostructures.



번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1058103
622 <11/27> Energy Amplifier Systems:Simulation and Experiments in the Field 2009.11.23 135276
621 <11/11>Leptogenesis in triplet seesaw models 2006.11.08 133385
620 <April 7(Wed.)> Mid-scale facilities for condensed matter research: high magnetic field and neutron scattering 2021.03.31 133076
619 2016학년도 1학기 콜로퀴움 일정 2016.02.03 133070
618 <9/26> Organic Polymers as Nuclear Radiation Sensors 2012.09.20 130264
617 <12/26> Emergent Physics in 3D Correlated Topological Semimetals file 2013.12.20 129567
616 <4/6> Knowledge is power: Maxwell's demon in the quantum wonderland 2011.03.31 129469
615 <11/6> Scaling laws between facility and population densities 2009.11.04 128297
614 <5/30> DNA 나노기술(DNA Nanotechnology) 2008.05.26 127207
613 <April. 6(Wed.) 4:30 PM> Quantitative Determination of High Tc Superconductivity Mechanism 2016.03.31 127033
612 <5/3> High-Speed MOSFET Technology: State-of-the-Art Strain Engineering 2006.05.02 126619
611 2021학년도 2학기 콜로퀴움 일정 2021.07.01 126517
610 <Oct. 20(Tue.) 2:00 PM> High-throughput Synthesis of Oxide Thin Films 2015.10.05 126185
609 2019학년도 1학기 콜로퀴움 일정 2019.01.08 125348
608 <12/3> Characteristic of risk asset in financial market. 2010.11.29 124591
607 <3/27>Social Experience, Brain, and Behavior 2009.03.23 122283
606 <Oct.16(Wed.)> 솟구치는 초고에너지 입자의 미스테리 2019.10.10 122267
605 <12/21(금)> Theory of topological quantum phase transitions in 3D noncentrosymmetric systems 2012.12.05 121459
604 <Nov.13(Fri) 16:00> Kondo screening in mixed valence and heavy fermion compounds and the signatures of Nozieres’ exhaustion 2015.11.04 121104
603 <5/29> Nanomaterials Work at NASA-Johnson Space Center 2009.05.25 120848