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 28181
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 975020
160 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 58072
159 <Oct.2(Wed.)> Fundamental physics with high-energy atmospheric and cosmic neutrinos today and in the future 2019.09.26 57996
158 <4/29(수) 오후4:30분> 양자정보 2015.04.23 57925
157 <2/17(Mon.)> Magneto-optical study of the Dirac semimetal Cd3As2 in Voigt geometry 2020.02.11 57837
156 <April.4(Wed.) 4:30 PM>From Static to Dynamic Multiferroics 2018.03.29 57683
155 <11/5(Thu.)> Higher Spin Cooper Pairs 2020.10.27 57627
154 <Mar.13(Wed.)> Physics in Medicine: Magnetic Resonance Imaging 2019.03.07 57121
153 <10/31(금)> The dynamics of composite pseudo-Goldstone Higgses 2014.10.27 57017
152 <5/13(수) 오후4:30분> 내가 몰랐던 대한민국 2015.05.07 56927
151 <9/23(화)> Novel resistive switching behavior of ferroelectric nanodevices file 2014.09.03 56918
150 <Oct. 5(Wed.) 4:30 PM> 국제원자력기구 (IAEA)와 핵데이터 2016.09.22 56726
149 <8/30(Fri) 16:00 ~ >Structures of light neutron-rich nuclei, 17,19C 2019.08.22 56578
148 <June 14(Wed.) 4:30 PM> Stellar core collapse: success or failure, and future probes 2017.06.08 56558
147 <Nov.20(Wed.)>At the End of Space and Time: Imaging the Black Hole in M 87 2019.11.14 56513
146 <Oct. 19(Wed.) 10:00 AM> Hyper-Kamiokande project -The future of neutrino physics in Japan 2016.10.12 56254
145 <4/24(금)> 초청세미나 개최 안내 file 2015.04.13 56106
144 <Nov. 16(Wed.) 4:30 PM> Two-dimensional Chiral Materials and Topological Insulators 2016.11.10 55710
143 <3/11(Mon) 10:30 am ~ >Probing Dark Matter at LIGO and Beyond 2019.03.04 55657
142 <Nov.14(Wed.) 4:30 PM> Status and Prospects for the IceCube Neutrino Observatory 2018.11.07 55653
141 <6/15(Fri.) ~ 16(Sat.)> Formation of first star and galaxy, Gravitational waves from Binary Mergers of Sub-Solar Mass Dark Black Holes 2018.06.12 55637