logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다.

 

아 래

 

제목: Emergent Quantum Phenomena in SrTiO3 Heterostructures

 

연사: 김  민  우 박사님 (서울대학교)

 

일시: 2014 12 2(화) 16:30

 

장소: 삼성학술정보관 7층 Creative Learning Room

 

초록: Oxide heterostructures have recently emerged as a new playground for exploring novel physics in low dimensional systems. Perhaps the most well known material is SrTiO3 (STO), not only as a building block of complex oxide heterostructures [1], but also as a high-mobility d0-electron semiconductor, and a superconductor with the lowest known carrier density. Using thin-film growth techniques, we have fabricated “delta-doped” STO structures that confine the superconducting Cooper pairs in 2D without surface or interface scattering. Crucially, these samples simultaneously show quantum oscillations that demonstrate the presence of 2D electron states [2]. More recently, we have found unconventional spin properties in these samples, revealed by the robustness of the superconductivity to parallel magnetic fields [3]. Furthermore, by increasing the mobility, we can clearly map out the transition of the electronic structure by dimensionality change from 2D to 3D, and approach the 2D clean regime where 2D metallic and superconducting phases can coexist [4]. These results provide an ideal system to investigate quantum phase transitions into a variety of ground states, and novel superconductivity in the 2D clean limit.

[1] A. Ohtomo & H. Y. Hwang, Nature 427, 423 (2006).
[2] Y. Kozuka et al., Nature 462, 487 (2009).
[3] M. Kim et al., Phys. Rev. B 86, 085121 (2012).
[4] M. Kim et al., Phys. Rev. Lett. 107, 106801 (2011).

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1079682
227 <5/1> Supersymmetry Breaking in Chern-Simons-matter Theories 2012.04.30 73300
226 <9/22(Thu.) 10:30> Bulk-boundary correspondence from the inter-cellular Zak phase 2016.08.29 73281
225 <7/2> Dyonic Instanton and Its Higgs Structures 2008.07.01 73236
224 <2/7>Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking 2013.02.06 73167
223 <12/17(Tue.)> Nuclear spectroscopy with low energy reaction thermal neutrons in ILL 2019.12.17 73141
222 <3/28> 양자물리학의 성립 과정 2012.03.22 72918
221 <12/1>21세기 관측우주론 2006.11.28 72887
» <12/2(화)> Emergent Quantum Phenomena in SrTiO3 Heterostructures 2014.11.21 72810
219 <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 72593
218 <Nov.20(Wed.)>At the End of Space and Time: Imaging the Black Hole in M 87 2019.11.14 72313
217 <May.15(Wed.)> Three-body problems and three-body forces in Classic and Quantum Systems 2019.05.08 72193
216 <12/12> 자성체의 스커미온 동역학 2012.12.06 72022
215 <10/11(Tue.) 15:00>Analysis of Individual Terrestrial Gamma-ray Flashes 2016.10.10 71938
214 <5/30> Dark Energy 2012.05.23 71857
213 <9/21> 금융공학과 금융산업 2007.09.17 71821
212 <12/5> 과학용어와 의학용어에 숨겨진 이야기 2012.11.28 71760
211 <March 8(Tue) 18:00> Unsolved puzzles of Gamma-Ray Bursts 2016.03.03 71739
210 2013학년도 1학기 콜로퀴움 일정 2013.02.19 71676
209 <6/4> Korea's challenges ahead for nuclear energy industry 2010.05.31 71607
208 <9/7> On Dark Matter and its indirect detection with box-shaped gamma-rays 2012.09.05 71542