visual
visual
gogle

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7

2016.04.27 15:34

Physics 조회 수:10490

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
120 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
119 2022-06-03 09:30  Online seminar  (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
118 2022-06-03 11:00  E6-2 #1323  (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
117 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
116 2022-06-10 14:30  E6-2. 1st fl. #1323  Combinatorial strategy for condensed matter physics: study on rare earth hexaborides thin films file
115 2022-06-10 16:00  E6-2. 1st fl. #1323  Fe5GeTe2의 나선형 자성특성과 자기저항의 전류밀도 의존성 연구 file
114 2022-06-23 11:00  E6 Room(#1322)  JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
113 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
112 2022-07-14 14:15  E6 #1501 & Zoom  Hund and electronic correlations in ruthenium-based systems
111 2022-07-14 15:00  E6 #1501 & Zoom  Pure two-dimensional quantum electron liquid and its phase transition
110 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
109 2022-08-01 10:00  E6 #1501 & Zoom  [Update 세미나 영상] James Webb Space Telescope & OTE Commissioning
108 2022-08-08 14:00  E6-2 #2502  Classical Shadow Tomography for Analog Quantum Simulators
107 2022-08-09 14:00  KI building (E4), Lecture Room Red (B501)  Quantum biology in fluorescent protein: a new model system to study quantum effects in biology file
106 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
105 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
104 2022-08-17 11:00  E6-6 #118호  Robust Hamiltonian Engineering of Large Quantum Systems (큰 양자시스템의 견고한 해밀토니안 엔지니어링)
103 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
102 2022-09-15 13:00  E6-2, #1323  AdS black holes: a review
101 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file
쓰기