visual
visual
gogle

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7

2016.04.27 15:34

Physics 조회 수:929

장소 #2501(E6-2. 2nd fl.) 
일시 Apr. 28 (Thu.) 3PM 
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 일시 장소 연사 제목
376 3. 21(월),16:00  E6, #1501  이상성교수 (한국천문연구원)  Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
375 August 1, 2018 at 11:00AM  양분순 빌딩 (E16-1) 207호  이대열 교수, 예일대 석좌교수  Future of AI: Is the brain a computer? file
374 Sep. 11(Fri), 14:00~  zoom  이관형교수/SNU, 이상윤교수/GIST  SRC Seminar file
373 5. 2(월),16:00  E6, #1501  유상운교수 (한밭대)  What can we learn from the history of science and technology?(우리말강의)
372 4pm, 28th April  E6 1323  유경식 (KAIST 전기및전자공학부)  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
371 2009/02/23-05/04  E6, 1501  안종현교수(성균관대) 외  Physics Colloquium : 2009 Spring file
370 2014/03/10-06/09  E6, 1501  신용일교수(서울대)  Physics Colloquium : 2014 Spring file
369 4pm, 14th April  E6 1323  신승우 (KAIST 물리학과)  (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
368 3. 7(월),16:00`  E6, #1501  손석우교수 (서울대 지구환경과학부)  Climate Physics and Modelling(우리말강의)
367 Aug. 1st(Mon), 10:00AM  E6 #1501 & Zoom  손상모 박사(Space Telescope Science Institute (STScI)  James Webb Space Telescope & OTE Commissioning
366 2011/05/16, 4PM  E6, 1501  서민교교수(KAIST)  Photonics with surface plasmon polaritons
365 5월 17일(화), 11:00 ~ 12:00  창의학습관(E11), 406호  방준혁 박사(Korea Basic Science Institute, KBSI)  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
364 2013/09/09-12/09  E6, 1501  박혁규교수(부산대) 외  Physics Colloquium : 2013 Fall
363 April 6 (Fri.), 10:00 AM  #2502, E6  박채연 박사  Entanglement and thermalization in many-body systems: recent progress file
362 2015/09/15-12/08  E6, 1501  박제근 교수(서울대 물리학과) 외12명  Physics Colloquium : 2014 Fall file
361 3. 14(월),16:00  E6, #1501  박용근교수 (KAIST 물리학과)  Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
360 5월27일(목) 오후4시  온라인  박소현 박사(CERN) / 이혜성 교수(KAIST)  찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
359 2016/03/11-06/09  E6-2, 1501 외  박권(KAIS) 외  Physics Seminar Serises : 2016 Spring file
358 2015/09/07-12/01  E6, 1501  문은국 교수(KAIST) 외  Physics Colloquium : 2015 Fall file
357 4. 11(월),16:00  E6, #1501  노재동교수 (서울시립대 물리학과)  Emergence of Statistical Mechanics in Quantum Systems
쓰기