visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
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)

번호 날짜 장소 제목
311 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
310 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
309 2020-12-02 10:00  Zoom  Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
308 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
307 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
306 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
305 2020-11-17 12:00  Online(Zoom)  Quantum- & Nano-Photonics" 세미나 시리즈 file
304 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
303 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
302 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
301 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
300 2020-10-15 17:00  https://bit.ly/3ndIiJn  Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe file
299 2020-10-15 16:00  CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus  Graphene-based Josephson junction microwave bolometer file
298 2020-10-15 16:00  (https://kaist.zoom.us/j/93997220310)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
297 2020-10-09 09:00  https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09  Quantum Many-Body Simulation file
296 2020-09-28 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond(Fourth Forum) file
295 2020-09-24 09:00  Zoom Video  (CAPP/IBS)Searching for Dark Matter with a Superconducting Qubit , Cryogenic Microwave Circuit Development at the NSTU file
294 2020-09-22 09:30  Zoom webinar  Physics and applications of soliton microcombs(Quantum- & Nano-Photonics) file
293 2020-09-14 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond (Third Forum) file
292 2020-09-11 14:00  zoom  SRC Seminar file