korean english


Home > 게시판 > 세미나


아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다


아 래


제목: Electronic phase transition in low dimensional SrTiO3/(Sr1-x,Lax)TiO3 oxide superlattices


연사: 이  재  찬 교수님 (성균관대학교 신소재공학부 )


일시: 2011년 9월 21일(수) 오후 4:30


장소: e+첨단강의실 (31214호실)


초록:  We report low dimensional oxide structures made by La doping on SrTiO3, represented by SrTiO3/(Sr1-x,Lax)TiO3 superlattices. The low dimensional transition metal oxide structures provide electronic confinement through orbital reconstruction of d orbital of the transition metal ion and correspondingly exhibit metal to insulator transition with the thickness of SrTiO3 layers. This is contrast to the behavior of bulk SrTiO3 doped with La.  The carrier density of the low dimensional structures also had a non-linear relationship with the stacking period while the carrier density of bulk SrTiO3 had a linear relation with La doping content.  Through the orbital reconstruction, degenerate narrow 3d bands are lifted and dxy band is shifted lower than dxz, dyz bands, making dxz band the first available state upon the La doping.  Moreover, doped electrons occupying dxz  band are strongly localized next the doped layer.  As a result, the low dimensional oxide structure has two types of carriers, one localized at the interface (La doped layer) and the other extended into SrTiO3 layer, which exhibit quite different transport characteristics from bulk doped case.  Transport behavior of such a low dimensional structure can be tuned by varying dimensionality and the corresponding metal-insulator transition is induced.   

번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 27058
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 969107
160 <Oct. 11(Wed.) 4:30 PM> Graphene Membrane for Imaging Molecular Assembly and Dynamics 2017.09.27 47051
159 <Oct. 18(Wed.) 4:30 PM> AlGaN/GaN HEMT 센서플랫폼 (KANCSensGaNTM) 기술 소개 file 2017.10.11 47932
158 <Nov. 1(Wed.) 4:30 PM> 광자와 이온트랩을 이용한 양자 정보처리 2017.10.25 44286
157 <Nov. 8(Wed.) 4:30 PM> 연성물질 기반 위상학적 결함구조의 상전이와 응 2017.11.01 88451
156 <Nov.15(Wed.) 4:30 PM> Mixed metal oxide films for energy and memory device applications 2017.11.08 54193
155 <Nov.22(Wed.) 4:30 PM> Dark Side of the Universe 2017.11.15 57424
154 <Nov.29(Wed.) 4:30 PM> The Intensity Frontier Experiment & SHiP 2017.11.22 44037
153 <Dec.6(Wed.) 4:30 PM> 실험핵천체물리학: 과거와 미래(Experimental Nuclear Astrophysics: Past and Future) 2017.11.29 43493
152 <Dec.13(Wed.) 4:30 PM>기본에 충실하고 새로움에 도전한다 - 자율주행자동차의 핵심 기술들 – 2017.12.07 50949
151 2018학년도 1학기 콜로퀴움 일정 2018.01.03 107494
150 <3/2(Fri.)11:00>Evolving magnetic interactions near a Kondo breakdown 2018.02.27 54105
149 <Mar.7(Wed.) 4:30 PM>Acoustic metamaterial: principles and applications of phononic crystals 2018.03.02 43195
148 <Mar.21(Wed.) 4:30 PM>깊은 땅속 중성미자 실험, DUNE 2018.03.14 43972
147 <3/16(Fri.)11:00> Superlattice phonons of two dimensional heterostructures 2018.03.16 59344
146 <Mar.28(Wed.) 4:30 PM>우주의 번개와 천둥 2018.03.27 42740
145 <April.4(Wed.) 4:30 PM>From Static to Dynamic Multiferroics 2018.03.29 56861
144 <April.11(Wed.) 4:30 PM>History of Superconductivity and its Future 2018.04.04 45733
143 <April.18(Wed.) 4:30 PM>금속의'블랙스완' 2018.04.11 41938
142 <May.2(Wed.) 4:30 PM> Machine learning and statistical physics 2018.04.23 49819
141 <May.9(Wed.) 4:30 PM> "How gold was produced in the universe?" 2018.05.02 60778