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 1092037
302 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 461370
301 <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 311924
300 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 265297
299 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 264599
298 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 261873
297 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 257013
296 <Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design 2021.01.11 250315
295 <11/5(화)> 특별세미나 개최 안내 2013.11.01 234903
294 <5/16(토)> 세미나 개최 안내 2015.05.18 229366
293 <9/20> Time-reversal anomaly in Josephson effect involving Majorana fermions 2012.09.20 208287
292 <11/21> Cosmological viable scalar-tensor theories of gravity 2012.11.16 205769
» <Feb.18(Thu.)> Hund's metallicity in the vicinity of a Van Hove singularity / Correlated topological phases in strongly correlated heterostructures 2021.02.16 202086
290 <8/20> Radioprotection effect and anti-tumor immunity by TCM-EF in mice 2013.08.21 194374
289 <4/18(금)> 양자물질초전도체창의연구소 초청 세미나 2014.04.15 189607
288 <12/20(Thu) 2:00pm> Gravitating Spinning Stars (a particle theorist's perspective) 2018.12.17 188431
287 <7/9> Strange Metallic Behavior in Anisotropic Background 2010.07.01 172977
286 <11/5> Discussion on recent observation of cosmological dipole of alpha 2010.11.04 172670
285 <6/2> The black hole search at the LHC: critical comment 2011.06.01 172487
284 <5/26>BK21 물리연구단 석학초빙 특별 세미나 2010.05.17 171966