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 2022학년도 1학기 콜로퀴움 일정 2022.01.10 26837
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 967387
305 <3/12> Nano Structure of wide Band Gap Semiconductors 2010.03.08 86382
304 <5/23> Nanotechnology in Korea: Present Status and Perspective 2008.05.21 86289
303 <9/8>Dynamics of one-dimensional electrons and exotic elementary excitations 2006.09.04 86232
302 <4/11> 방사광 연 X선을 이용한 미시적 물성 연구 2008.04.07 86185
301 <Dec. 2(Wed.) 4:30 PM> Next-generation solar cells for high photo-conversion efficiency 2015.11.25 85471
300 <4/17> Probing Stellar Explosions with Radioactive Beams* 2013.04.10 85357
299 <10/13> What has happened in the beginning of the universe? 2006.10.11 85354
298 2011학년도 2학기 콜로퀴움 일정 안내 2011.08.22 84902
297 <4/16>같은 곳을 바라보는 다른 시선 2010.04.09 84524
296 <3/16> Inelastic X-ray Scattering: past, present, and the future 2011.03.10 84306
295 <5/8>Recent trend of thin film battery 2009.05.06 84196
294 <9/19> Novel mechanical degree of freedom at nanoscales 2012.09.13 84142
293 <4/13> Introduction to Quantum Information Processing 2007.04.11 83786
292 <4/3>Enhanced emission rate from a single quantum well using surface plasmon 2009.03.31 83701
291 <11/20> Particle Accelerators: Driving Forces for Energy 2009.11.16 83536
290 <4/18> 삼중항 여기자를 이용한 유기광전소자 연구 2012.04.05 83435
289 <10/5> Acoustic Metamaterials and Reversal of Sound 2011.09.26 83398
288 <6/12> Latest Results from the IceCube Neutrino Observatory 2013.06.07 83397
287 <6/9> Status and Prospects of Big Science in Korea 2006.06.05 83057
286 <5/23> 나노구조 산화물 재료의 기능성-용매화전자에서 전자화합물까지... 2012.05.17 83038