logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.


4시 20분부터 제1과학관 31214 e+강의실에서 간단한 다과를 제공합니다.


아 래


Title: Hidden-in-bulk Phase Transitions in Artificial Quantum Materials


Speaker: 이  대  수 교수님 (Department of Physics, POSTECH)


Date & Time: Nov. 7. (Wed.) 2018 4:30 PM


Place: Natural Science 1,  Room No. 31214


Abstract: A major challenge in condensed matter physics is predictive control of physical properties and functions in complex materials. In this talk, I will demonstrate a heterostructuring approach to engineer free-energy landscape and stabilize a new state, otherwise away from equilibrium, in a controlled way. First, as a model material, I choose an archetypal correlated material VO2, which has the insulating ground state of the monoclinic phase. A designed heterostructure suppresses the electronic correlation without changing the crystal structure in this otherwise correlated insulator. It stabilizes a nonequilibrium metallic state, leading to an isostructural metal-insulator transition. In addition, I will show emergence of an ordered ferroelectric state in ultrathin films of an otherwise non-ferroelectric SrTiO3. This challenges the long-standing notion that a collective order (e.g., ferroelectricity) is inevitably suppressed at the scale of a few nanometers. Last, I will shortly discuss on how the atomic-layer-controlled heterostructuring can manipulate complex phase transitions in a predictive manner. These discoveries highlight the ability to control the hidden-in-bulk phase transitions in heterostructures, as well as provide new insights for exploring complex materials.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1078990
466 <11/26> The Carbon New Age 2010.11.18 94139
465 <Nov.18(Wed.)>When Physics meets the Living Cells 2020.11.11 94128
464 <5/23> Nanotechnology in Korea: Present Status and Perspective 2008.05.21 94114
463 <11/20> Particle Accelerators: Driving Forces for Energy 2009.11.16 94077
462 <4/3> Spin-orbit coupling induced Mott insulating state 2009.03.13 93887
461 <3/12> Nano Structure of wide Band Gap Semiconductors 2010.03.08 93813
460 <9/11> Epitaxial Oxygen Sponge 2013.09.09 93793
459 <Sep. 30(Wed.) 4:30 PM>Local electronic structures of stacking grain boundary in bilayer graphene 2015.09.23 93576
458 <2/14> An inverse voter model for co-evolutionary networks: stationary efficiency 2011.02.11 93492
457 <10/13> What has happened in the beginning of the universe? 2006.10.11 93460
456 <10/12> Kondo Effect in a Quantum-Dot-Topological-Superconductor Junction: A Numerical Renormalization Group Analysis 2012.10.08 93257
455 <11/4>Plasmonic Properites of Metallic Nanostructures 2009.10.30 93168
454 <11/27> Introduction to Terahertz and Infrared Spectroscopy 2013.11.21 93121
453 <5/16> superconformal index with line operators and domain walls 2012.05.14 93055
452 <4/9> 중이온가속기 KoRIA 구축 계획 2010.04.02 93055
451 <10/5> Acoustic Metamaterials and Reversal of Sound 2011.09.26 92896
450 <4/11> 방사광 연 X선을 이용한 미시적 물성 연구 2008.04.07 92502
449 <6/5>Magnetism and Superconductivity 2009.05.27 92304
448 <10/13> 물리학과 저차원 스핀계 연구팀 초청 세미나 2006.10.11 92249
447 <5/12> An Infrared View of the Universe 2006.05.09 92239