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: 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 1079812
587 <1/25> Perturbation during Inflation 2011.01.19 84492
586 <1/26> Hamiltonian formalism 2011.01.19 95422
585 <2/14> Complex network models for mobile ad hoc networks 2011.02.11 99747
584 <2/14> An inverse voter model for co-evolutionary networks: stationary efficiency 2011.02.11 93581
583 <2/15> Geometric distance-dependent percolations in networks on two-dimensional planes 2011.02.11 92240
582 <2/14> Basics of Gravitational Perturbatiosn 2011.02.11 84665
581 <2/15> Perturbation during Inflation 2011.02.11 89735
580 <2/16>Hamiltonian formalism 2011.02.11 90305
579 <4/19> Nuclear Reaction Theories 2011.04.14 99445
578 <4/22> How Many is Different? Ideal Bose gas revisited 2011.04.22 96158
577 <6/2> The black hole search at the LHC: critical comment 2011.06.01 167182
576 <6/10> 초전도 분야 특별세미나 개최 file 2011.06.01 82869
575 <7/14> Calculating the partition function of N=2 Gauge theories on $S^3$ and AdS/CFT correspondence 2011.07.12 98374
574 <9/7> Magnets and Science at the NHMFL 2011.09.06 82464
573 <9/20> 초전도분야 특별초청세미나 개최 file 2011.09.16 83673
572 <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 126511
571 <11/3> Special Seminar - "2011 Nobel Physics: The beginning and the end of the universe" 2011.10.27 81701
570 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 253466
569 <3/22> 석학초청 특별강연 – Pyeongyang Advances Its Nuclear Program 2012.03.07 67412
568 <3/14> Proto-neutron star 2012.03.08 68418