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 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1088959
696 <Nov. 21(Mon.)> Strong magneto-elastic coupling observed in ultrafast lattice dynamics of SrRuO3 based superlattices 2022.11.15 32
695 <Nov. 16(Wed.)> 원자핵의 존재 한계를 찾아서 2022.11.11 41
694 <Nov. 23(Wed.)> 단백질 구조예측과 알파폴드의 물리학 2022.11.17 41
693 <Nov. 11(Fri.)> On the origin of CDW in two-dimensional materials 2022.11.04 80
692 <Nov. 11(Fri.)> Nonvanishing anomalous Hall effect in Mn3Al- compensated ferrimagnetic Heusler compound 2022.11.08 84
691 <Nov. 2(Wed.)> The latest from quantum Hall effect in graphene family 2022.10.27 135
690 <Oct. 26(Wed.)>Atomic-scale observation of structural phase transition of strontium ferrite 2022.10.22 154
689 <Oct. 5(Wed.)>“사라진 중성미자를 찾아서” 2022.09.29 200
688 <Sep. 21(Wed.)>Dynamics and thermodynamics of bimolecular reactions at aqueous-nonaqueous interfaces 2022.09.15 283
687 <Nov. 9(Wed.)> 천체와 우주의 진화에서 보는 원소의 기원 2022.11.02 316
686 <Sep. 14(Wed.)>The Next Generation of Photonic Sources – Light-Emitting Devices 2022.09.08 497
685 <Sep. 7(Wed.)>Flavor of particles, as a key for New physics 2022.09.01 515
684 <Oct. 12(Wed.)>Neurodegenerative Diseases from the Chemical Force Point of View 2022.10.05 970
683 2022학년도 2학기 콜로퀴움 일정 2022.06.22 1650
682 <May 4(Wed.)>Recent progress in the study of topological phases of matter 2022.04.27 1744
681 <May 18(Wed.)>Magnetoresistance and Hall effects of Fe5Sn3 single crystals 2022.05.12 1749
680 <Apr. 20(Wed.)> 반도체 공정용 플라즈마 물리 2022.04.14 1774
679 <Apr. 27(Wed.)> I) A few first questions by me. II) ‘Topotactic resistance switching RAM’의 최초 발견 2022.04.20 1777
678 <July 8(Fri.)>Intertwined magnetism and charge density wave in a kagome metal 2022.06.03 1830
677 <May. 10(Tue.)>Longitudinal magnon decay in the quasi-two-dimensional antiferromagnet in Ba2FeSi2O7 2022.05.09 2220