(응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids
2022.05.25 09:05
장소 | Online seminar |
---|---|
일시 | March 18(Fri.) 11:00 |
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)
- Link: https://kaist.zoom.us/j/87307858369?pwd=am5MUmZSaHZFS0pDRkxPTWloSDNYdz09
- PW: 079031
- PW: 079031
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)

댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
387 | June 23th (Thur), 11:00 | E6 Room(#1322) | Sun Yool Park(Joint Institute for Laboratory Astrophysics (JILA) & University of Colorado) |
JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model
![]() |
386 | Jun. 10 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Sanghoon Kim(Department of Physics, University of Ulsan) |
Fe5GeTe2의 나선형 자성특성과 자기저항의 전류밀도 의존성 연구
![]() |
385 | Jun. 10 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Seunghun Lee(Department of Physics, Pukyong National University) |
Combinatorial strategy for condensed matter physics: study on rare earth hexaborides thin films
![]() |
384 | Jun. 10 (Fri.), 11:00 AM | Online seminar | Dr. Yoon Jang Chung(Laboratory for Physical Sciences, University of Maryland) |
Record-quality two-dimensional electron systems
![]() |
383 | June 3rd, Fri. 9:30 AM | Online seminar | Prof. Juejun Hu ( Massachusetts Institute of Technology) |
(Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics
![]() |
382 | June 3(Fri.) 11:00 | E6-2 #1323 | Prof. Gil Young Cho (Department of Physics, POSTECH) | (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials |
381 | May 20(Fri.) 11:00 | E6-1 #1323 | Prof. Kwanpyo Kim (Department of Physics, Yonsei University) | (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals |
380 | April 15(Fri.) 11:00 | Online seminar | Prof.Jaekwang Lee (Department of Physics, Pusan National University) |
(응집물리 세미나) First-principles studies of polar oxides and their applications
![]() |
379 | April 08(Fri.) 11:00 | E6-1 #1323 | Prof. Se-Young Jeong (Optics and Mechatronics Engineering , Pusan National University) |
(응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film
![]() |
378 | Mar. 25(Fri.) 11:00 | E6-1 #1323 | Prof. Ara Go (Department of Physics, Chonnam National University) |
(응집물리 세미나) Hund's metallicity in ruthenate systems
![]() |
» | March 18(Fri.) 11:00 | Online seminar | Dr. Dirk Wulferding (IBS-Center for Correlated Electron Systems, Seoul National University, Seoul) |
(응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids
![]() |
376 | May 27,(Fri), 11:00 AM | Online seminar | Prof. Gray Rybka(University of Washington) |
Current Status and Future Plans of ADMX
![]() |
375 | May. 25th (Wed), 14:00 | E6 Room(#2501) | Dr. Duk-Hyun Choe(Samsung Advanced Institute of Technology) |
Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia
![]() |
374 | May. 25(Wed), 4pm | E6-2. 1st fl. #1323 / Zoom | Dr. Sungwoo Hong (Enrico Fermi Institute at University of Chicago) | Uncovering New Lampposts for Dark Matter: Continuum or Conformal |
373 | 4pm, 26th May | E6 1323 | 황민수 (Department of Physics, Korea University) | (광학분야 특별세미나)Topological photonic devices |
372 | 3pm, 19th May | online | Jonghee Yoon, PhD (Assistant professor, Department of Physics, Ajou University) | (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis |
371 | 5. 30(월), 16:00 | E6, #1501 | 공수현교수 (고려대학교 물리학과) | Light manipulation using 2D layered semiconductors |
370 | 5. 23(월),16:00 | E6, #1501 | 김준성교수 (postech 물리학과) | Novel electronic transport in topological van der Waals magnets |
369 | 5.16(월),16:00 | E6, #1501 | 조규붕교수 (HKUST) | Design synthetic topological matter with atoms and lights |
368 | 5. 9(월),16:00 | E6, #1501 | 김창영교수 (서울대) | Searching for new electronic properties in correlated material flatland |