logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다.

 

                    아     래

 

제목:  Frustration and dimensional reduction in multi-orbital systems

 

연사:  Professor Zohar Nussinov (Washington University)

 

일시: 2011년 11월 4일(금) 오전 11:00

 

장소:  물리학과 세미나실 (31355호실) 

 

초록:  I will briefly review the rudiments of orbital physics and then discuss several more recent results. Orbitals may be described by SU(2) operators. However, unlike spins, orbitals live real space and thus their interactions are highly frustrated and may lead to unconventional correlations. It will be shown that spatial orders of electronic orbital states in a crystal can be triggered by thermal fluctuations alone (contrary to earlier lore, no zero point quantum fluctuations are necessary to stabilize orders). It will be further shown how symmetry considerations alone give rise to dimensional reduction as well as topological order and selection rules that may be experimentally tested from scattering measurements. I will illustrate that in addition to charge and spin order driven quantum critical points, "Orbital Order Driven Quantum Criticality" can, as a matter of principle, also occur in the simplest orbital Hamiltonians. New predicted orbital nematic orders will be demonstrated in some of the best known orbital dependent Hamiltonians. Time permitting, I will briefly discuss an exact solution for a system directly derived from the Hubbard model on the pyrochlore lattice and illustrate how a similar dimensional reduction that occurs there triggers deconfined excitations at a quantum critical point.

번호 제목 날짜 조회 수
공지 2020학년도 2학기 콜로퀴움 일정 2020.07.16 8551
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 542125
621 2019학년도 2학기 콜로퀴움 일정 2019.07.17 380898
620 2020학년도 1학기 콜로퀴움 일정 2020.01.31 212436
619 <5/16(토)> 세미나 개최 안내 2015.05.18 115606
618 2017학년도 1학기 콜로퀴움 일정 2017.01.05 110964
617 2016학년도 1학기 콜로퀴움 일정 2016.02.03 109553
616 2019학년도 1학기 콜로퀴움 일정 2019.01.08 97258
615 2018학년도 2학기 콜로퀴움 일정 2018.07.03 91069
614 2018학년도 1학기 콜로퀴움 일정 2018.01.03 84695
613 2014학년도 2학기 콜로퀴움 일정 2014.09.11 80744
612 <4/2> Radio Detection of Ultra High Energy Cosmic Rays and Neutrinos in Antarctica 2014.03.26 80385
611 2017학년도 2학기 콜로퀴움 일정 2017.07.04 78982
610 <5/1>In vivo optical imaging of hemodynamic changes 2009.05.06 73663
609 <6/2> The black hole search at the LHC: critical comment 2011.06.01 73280
608 <9/1> 원자핵 자기공명(Nuclear Magnetic Resonance) 해설 - 원자선에서 영상까지 2010.08.30 72823
607 <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 72054
» BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 71622
605 <4/19> Nuclear Reaction Theories 2011.04.14 71506
604 <9/15> Resistance Switching Behavior of Epitaxially Grown NiO Thin Films 2009.09.07 71506
603 2016학년도 2학기 콜로퀴움 일정 2016.08.02 70243