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 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1090352
398 <12/10(수)> Magnetic Resonance Imaging: What is relevant to physics 2014.12.04 70918
397 <12/3(수)> 진공은 무( 無)로 채워지지 않았다. 힉스입자를 찾아서 2014.11.27 61428
396 <12/2(화)> Emergent Quantum Phenomena in SrTiO3 Heterostructures 2014.11.21 73815
395 <11/26(수)> Neutrino Physics with KamLAND 2014.11.20 207645
394 <11/19(수)> 3D topological insulators with magnetic impurities 2014.11.13 82121
393 <11/12(수)> Photovoltaic effect and polarization-modulated conduction in ferroelectrics 2014.11.05 87734
392 <11/5(수)> 안전한 사회를 위한 과학의 역할 2014.11.01 64624
391 <10/31(금)> The dynamics of composite pseudo-Goldstone Higgses 2014.10.27 59601
390 <10/29(수)> 창조경제와 과학기술혁신시스템 2014.10.16 64402
389 <10/15(수)> 첨단 과학 기술의 세계와 물리학의 위상 2014.10.08 66668
388 <10/8(수> Astrophysical probes of Dark Matter, the case of the Milky Way 2014.10.01 105523
387 <10/1(수)> 초전도 양자컴퓨터 - Superconducting qubit and circuit QED 2014.09.26 67492
386 <9/24(수)> Design Principles of Cellular Networks 2014.09.18 69640
385 <9/17(수)> Reshaping Micro/Nanophotonics by Programmable Soft-Matter 2014.09.15 70264
384 2014학년도 2학기 콜로퀴움 일정 2014.09.11 107263
383 <9/23(화)> Novel resistive switching behavior of ferroelectric nanodevices file 2014.09.03 59727
382 <9/11(목)> The effects of dark matter elastic scattering on the cosmological signals 2014.09.01 68490
381 <7/21(월)> The rapid neutron capture nucleosynthesis: A hot topic in the Nuclear Astrophysics study 2014.07.15 130185
380 <5/30(금)> 입자물리이론 그룹 미니 워크숍 개최 안내 2014.05.29 108402
379 <6/11> Advanced Physiological Optics and Its Ophthalmic Applications 2014.05.28 281428