visual
visual
Development fund

Development
fund
gogle

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7

2016.04.27 15:34

Physics 조회 수:10690

날짜 2016-04-28 15:00 
일시 Apr. 28 (Thu.) 3PM 
장소 #2501(E6-2. 2nd fl.) 
연사 Dr. Chang Hee Sohn, SEOUL NATIONAL UNIVERSITY 

Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7

 

Apr. 28 (Thu.) 3PM, #2501(E6-2. 2nd fl.)
Dr. Chang Hee Sohn, SEOUL NATIONAL UNIVERSITY

 

We investigated strong lattice/spin/charge coupling in 5d pyrochlore Cd2Os2O7 by using optical spectroscopy. In the first part of the presentation, I’ll show strong effect of magnetic ordering on the charge dynamics of Cd2Os2O7. In this compound, we observe that all-in/all-out antiferromagnetic ordering induces a Lifshitz-type metal-insulator transition that magnetic ordering gradually annihilates the Fermi surface. In the second part of the talk, I’ll present strong spin-lattice coupling in Cd2Os2O7. We observed large renormalization of phonon frequencies below all-in/all-out antiferromagnetic ordering temperature, which can be understood in terms of modulation of Heisenberg exchange interaction and single ion anisotropy. Relevance to expected novel phenomena and future work will be discussed.

 

Contact: Eun Gook Moon, Physics Dept., (egmoon@kaist.ac.kr)

목록
번호 날짜 장소 제목
449 2022-03-28 16:00  E6, #1501  Ultimate-density atomic semiconductor via flat bands
448 2022-03-07 16:00  E6, #1501  Climate Physics and Modelling(우리말강의)
447 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
446 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
445 2022-04-11 16:00  E6, #1501  Emergence of Statistical Mechanics in Quantum Systems
444 2022-04-25 16:00  E6, #1501  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
443 2022-04-04- 16:00  E6, #1501  New paradigms in Quantum Field Theory
442 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
441 2022-04-14 16:00  E6 1323  (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
440 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
439 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
438 2022-03-31 16:00  online  (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
437 2016-09-21 16:00  E6-2. #2502(2nd fl.)  Entanglement probe of two-impurity Kondo physics
436 2016-04-18 15:30  KI빌딩(E4), 강의실 B501 (5F)  First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism file
435 2022-05-02 16:00  E6, #1501  What can we learn from the history of science and technology?(우리말강의)
434 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets
433 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
432 2022-05-09 16:00  E6, #1501  Searching for new electronic properties in correlated material flatland
431 2022-05-16 16:00  E6, #1501  Design synthetic topological matter with atoms and lights
430 2016-05-17 11:00  창의학습관(E11), 406호  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
쓰기