logo

korean english

게시판

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 28136
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 974735
320 <4/18> 삼중항 여기자를 이용한 유기광전소자 연구 2012.04.05 87086
319 <4/4> Cooking up elements in the universe: Nuclear astrophysics with exotic ion beams 2012.03.29 78524
318 <3/28> 양자물리학의 성립 과정 2012.03.22 70285
317 <3/21> 우주가속팽창의 원인 규명 2012.03.15 86784
316 <3/14> 시공간 왜곡과 우주론(Spacetime warp and Cosmology) [2] 2012.03.07 76405
315 2012학년도 1학기 콜로퀴움 일정 안내 [5] 2012.02.29 82105
314 <12/7> Optical Antennas 2011.11.30 80161
313 <11/30> 기능성 산화물의 현황과 응용 2011.11.24 77621
312 <11/23> How statistical physics contributes to Internet world: perspectives, methods and applications 2011.11.15 80745
311 <11/16> Study of carrier transport and charging effects in organic devices 2011.11.10 93086
310 <11/9> Bosons in high Tc superconductors: an experimental survey 2011.10.31 97075
309 <11/2> Color Science for Reflective mode Optical Shutter 2011.10.27 116103
308 <10/26> 빛으로 보는 세상 2011.10.17 76275
307 <10/12> Introduction to the Proton Engineering Frontier Project 2011.10.10 78828
306 <10/5> Acoustic Metamaterials and Reversal of Sound 2011.09.26 83826
» <9/21> Electronic phase transition in low dimensional SrTiO3/(Sr1-x,Lax)TiO3 oxide superlattices 2011.09.09 79492
304 <9/7> 과학과 예술 (Science and Arts) 2011.08.30 78349
303 2011학년도 2학기 콜로퀴움 일정 안내 2011.08.22 85033
302 <6/8> 액체금속 및 물의 과냉각 현상과 국소구조와의 관계 : 정전기 공중부양 기술 및 dynamic diamond anvil cell 2011.06.07 98287
301 <6/1> Electron phonon coupling effect in 4d transition metal oxide magnetism 2011.05.26 94951