• HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-03-18 11:00 
일시 March 18(Fri.) 11:00 
장소 Online seminar 
연사 Dr. Dirk Wulferding (IBS-Center for Correlated Electron Systems, Seoul National University, Seoul) 
1. Date / Time 
  - March 18, 2022 
  - 11:00 AM (KST)
2. ZOOM (Only online)
3. Speaker
    - Dr. Dirk Wulferding (IBS-Center for Correlated Electron Systems, Seoul National University, Seoul)
4. Talk Title
    - Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids 
5. Abstract
   -  Quantum spin liquids are paradigmatic examples of long-range entangled quantum states that host fractionalized excitations and may realize non-abelian anyonic quantum statistics. These states can emerge in systems with magnetic correlations that are restricted in dimensionality and in coordination, and that are characterized by a small quantum spin number [1]. While this concept is strikingly simple, so far only a few materials exist that are considered as good candidates for quantum spin liquid ground states. A major challenge is that these states evade any classical long-range order, thereby lacking any clear experimental fingerprints. Adding to this challenge is that oftentimes only microscopically small samples can be synthesized, thus limiting possible experimental characterization probes. 
    Raman spectroscopy is a method sensitive to magnetic excitations in both triplet and singlet sector, and therefore sensitive to fractionalized spinon and Majorana fermionic excitations that emerge from quantum spin liquid ground states [2]. In my talk, I will review how we characterize the ground states of various Heisenberg antiferromagnets on the kagome lattice, and of Kitaev spin liquids using Raman spectroscopy at high magnetic fields. Our data suggest that in vicinity to quantum criticality Kitaev magnets may host non-abelian Majorana bound states [3]. 
[1] see, e.g., Savary, et al., Rep. Prog. Phys. 80, 016502 (2017). 
[2] Wulferding, et al., JPCM 32, 043001 (2020). 
[3] Wulferding, et al., Nat. Commun. 11, 1603 (2020)
0221_카이스트 물리학과(응집물리)포스터-최종.jpg


번호 날짜 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
308 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
307 2022-10-24 16:00  E6 #1501(공동강의실)  Physics Colloquim(Fall 2022) file
306 2022-01-25 15:00  E6 #1501/online  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
305 2022-03-31 10:00  E6 #1501/zoom  Weiss fields for Quantum Spin Dynamics file
304 2022-03-29 10:00  E6 #1501/zoom, E6 #2502/zoom  Non-reciprocal phase transitions file
303 2022-10-04 16:00  E6 #2501  Distinguishing 6d (1, 0) SCFTs
302 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
301 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
300 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
299 2022-04-14 16:00  E6 1323  (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
298 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
297 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
296 2019-08-06 16:00  E6 Room(#1323)  Visualization of in-plane piezoresponse vector fields file
295 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
294 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
293 2018-11-22 15:00  E6 Room(#1323)  Experimental and Computational Study on Physical Properties based on Granular System file
292 2022-05-25 14:00  E6 Room(#2501)  Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file
291 2019-07-08 14:00  E6, #1322  Ultrabroadband squeezed pulses and their relation to relativity file
290 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
289 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets