korean english


Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

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

아 래

Title: First-principles studies of complex oxides interfaces

Speaker: 이  재  광 교수님 (부산대학교 물리학과)

Date & Time: Dec. 12. (Wed.) 2018 4:30 PM

Place: Natural Science 1,  Room No. 31214

Abstract: The Oxide interfaces have attracted considerable attention in recent years due to emerging novel properties that do not exist in the corresponding parent compounds. Furthermore, modern atomic-scale growth and probe techniques enable the formation and study of new artificial interface states distinct from the bulk state. A central issue in understanding the novel phenomena in oxide heterostructures is to reveal how various physical variables (spin, charge, lattice and/or orbital hybridization) interact with each other at the atomic scale. Recently, unlike strongly localized two-dimensional electron gas (2DEG) in LAO/STO (001) heterostructure, a wide n-type 2DEG distribution is observed at the LAO/STO (111) interface. According to the polar catastrophe scenario, the LAO/STO (111) interface consisting of [Ti]4+ and [LaO3]3- layers is expected to exhibit the highly localized p-type characteristics. Despite these controversies, the origin of n-type 2DEG at the LAO/STO (111) interface has not been clearly revealed yet. Here, using density functional theory calculations, we find that the n-type 2DEG originates from extra electrons created by the oxygen vacancy in the [[LaO3]3- terminated LAO (111) surface, and these excess oxygen vacancies significantly modulate the relative displacements between La and oxygen atoms in LAO layers. Our theoretical studies help understanding how physical variables couple with each other and how they develop novel functionalities at various oxide interfaces.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1090627
336 <Oct.16(Wed.)> 솟구치는 초고에너지 입자의 미스테리 2019.10.10 147456
335 <Oct.2(Wed.)> Fundamental physics with high-energy atmospheric and cosmic neutrinos today and in the future 2019.09.26 72032
334 <Sept.18(Wed.)> Rare-earth: versatility and capability 2019.09.16 89429
333 <Sept.11(Wed.)> Fantastic physics and materials, how to find them? 2019.09.06 91540
332 2019학년도 2학기 콜로퀴움 일정 2019.07.17 428929
331 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 244089
330 <June.5(Wed.)> Fluid gravity duality 2019.05.29 68705
329 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 80041
328 <May.15(Wed.)> Three-body problems and three-body forces in Classic and Quantum Systems 2019.05.08 76112
327 <May.8(Wed.)> Genesis of Matter 2019.05.01 42220
326 <May.1(Wed.)> Introduction of AMS Application 2019.04.24 70304
325 <April.17(Wed.)> Emerging Artificial Synapse for Learning- and Energy-Efficient Neuromorphic System 2019.04.11 130660
324 <April.10(Wed.)> 자성 반데르발스 물질 발견과 전망(Discovery and Perspective of magnetic van der Waals materials) 2019.04.04 49167
323 <April.3(Wed.)> 전자구조계산을 이용한 새로운 양자물질 연구 2019.03.27 47756
322 <Mar.27(Wed.)> Ultrafast Movie Maker for Photo-induced Dynamics: Ultrafast Electron Microscope 2019.03.20 95519
321 <Mar.20(Wed.)> Connecting Thermoelectricity and Superconductivity by Pressure Bridge 2019.03.13 58718
320 <Mar.13(Wed.)> Physics in Medicine: Magnetic Resonance Imaging 2019.03.07 64376
319 2019학년도 1학기 콜로퀴움 일정 2019.01.08 129998
» <Dec.12(Wed.)> First-principles studies of complex oxides interfaces 2018.12.05 66235
317 <Dec.5(Wed.)> 두 펄사 이야기 2018.11.28 162774