visual
visual
gogle

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7

2016.04.27 15:34

Physics 조회 수:509

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
공지 2019/09/18 - 12/5  Seminar Room #1323  Prof. David Schuster and etc.  Fall 2019: Physics Seminar Serises
공지 2019/09/02 - 12/09  Seminar Room 1501  이호성 박사 (한국표준과학연구원) and etc.  Fall 2019: Physics Colloquium
253 Apr. 12 (Tue.), 4 PM  E6-2. 1st fl. #1323  Dr. Jeehoon Kim, POSTECH  Confinement of Superconducting Vortices in Magnetic Force Microscopy
252 Apr. 19 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. YoungWoo Nam  A family of finite-temperature electronic phase transitions in graphene multilayers file
251 Apr. 19 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Seok Kyun Son  Graphene and hBN heterostructures file
250 Apr. 19(Mon) 19:00  Zoom webinar  Chia-Ling Chien (Johns Hopkins, USA)  Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
249 Apr. 19(Tue.), 2PM  #1323(E6-2. 1st fl.)  Prof. Mark Koepke, Department of Physics and Astronomy, West Virginia University, USA  Nonlocal collisional electron transport in partially ionized plasma generation, structure, and stability
248 Apr. 2 (Fri.), 02:30 PM  Online(Zoom)  Dr. Tae Hyun Kim (SNU)  Quantum computing and entanglement generation using trapped ions and photons
247 Apr. 2 (Fri.), 04:00 PM  Online(Zoom)  Dr. Heejun Yang (KAIST)  Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy
246 Apr. 27, 2017 (Thu) 4:00 pm  Seminar Room(#1323, E6-2)  Prof.Donghan Lee (Chungnam National Univ.)  반도체 양자점을 이용한 단광자 광원
245 Apr. 28 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. JeongYoung Park Graduate School of EEWS, KAIST  Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
244 Apr. 28 (Fri.), 04:00 PM  #1323 (E6-2. 1st fl.)  Dr. Minkyung Jung Research Institute, DGIST  Carbon nanotubes coupled to superconducting impedance matching circuits
» Apr. 28 (Thu.) 3PM  #2501(E6-2. 2nd fl.)  Dr. Chang Hee Sohn, SEOUL NATIONAL UNIVERSITY  Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
242 Apr. 5 (Tue.), 4PM  E6-2. 1st fl. #1322  Dr. Ara Go, Columbia University  A new impurity solver for multi-orbital systems: adaptive truncation of the Hilbert space
241 Apr. 9 (Fri.), 10:00 AM  Zoom webinar  Prof. Marko Loncar (Harvard University, USA)  Integrated Lithium Niobate Photonics file
240 Apr.19 (Fri.), 11:00 AM  #1323, E6-2  Dr. Ji-Sang Park  First-principles studies of semiconductors for solar cell applications file
239 April 11 (Thu.), 16:00 PM  #1323, E6-2  Prof. Joo-Hyoung Lee, GIST  Massive screening for cathode active materials using deep neural network file
238 April 11 (Wed), 1:30pm  #1323 (E6-2, 1st fl.)  Dr. Yongsoo Yang  Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
237 April 11 (Wed), 4:00pm  #1323 (E6-2, 1st fl.)  Dr. Young-Sik Ra  Non-Gaussian states of multimode light generated via hybrid quantum information processing file
236 April 13 (Fri.), 10am  #1323 (E6-2, 1st fl.)  Dr. Sungkun Hong  Quantum meets Mechanics: from Quantum Information to Fundamental Research file
235 April 23 (Tue.), 4:00 PM  #1323, E6-2  Prof. Johan Chang  From Mott physics to high-temperature superconductivity file
234 April 26 (Fri.), 4:00 PM  #1323, E6-2  Dr. Soonwon Choi  Robust Quantum Metrology using Strongly Interacting Spin Ensembles and Quantum Convolutional Neural Network file
쓰기