visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-11-25 11:00 
일시 Nov. 25 (Fri), 11:00AM 
장소 E6-2 #1323 
연사 이승섭(서울대 물리천문학부 교수) 
세미나 영상은 아래 링크로 확인 바랍니다. (공개기간: 2023.01.10-2024.01.09, 1년)
 
1. Date / Time 
    - Nov  25, 2022
    - 11:00 AM (KST)
 
2. Place: E6-2 #1323
 
3. Speaker
    - 이승섭 (서울대 물리천문학부 교수)
 
4. Talk Title
    -  DMFT+NRG: From models to real materials, from local to nonlocal correlations
 
5. Abstract
In this talk, I will describe a powerful numerical approach for studying strongly correlated systems, which uses the numerical renormalization group (NRG) as an impurity solver of dynamical mean-field theory (DMFT). Based on recent methodological advances made by my colleagues and me, I have established an NRG method that can handle first-principles calculations and nonlocal electronic correlations. It provides accurate real-frequency dynamical properties for low system temperatures, which goes beyond the reach of other methods, such as quantum Monte Carlo. Such strengths are demonstrated in our studies: We clarified the key characteristics of Hund metals, namely spin-orbital separation [1, 2] and orbital differentiation [3], in model systems as well as strontium ruthenate [4]. We also investigated intriguing quantum critical behaviors in heavy-fermion systems [5]. Last but not least, I will introduce our recent breakthrough in the theory of multipoint correlation functions [6, 7], which describe inelastic scattering and nonlocal correlations.
 
[1] E. Walter, K. M. Stadler, S.-S. B. Lee*, Y. Wang, G. Kotliar, A. Weichselbaum, and J. von Delft, Phys. Rev. X 10, 031052 (2020).
[2] Y. Wang, E. Walter, S.-S. B. Lee, K. M. Stadler, J. von Delft, A. Weichselbaum, and G. Kotliar, Phys. Rev. Lett. 124, 136406 (2020).
[3] F. B. Kugler, S.-S. B. Lee, A. Weichselbaum, G. Kotliar, and J. von Delft, Phys. Rev. B 100, 115159 (2019).
[4] F. B. Kugler, M. Zingl, H. U. R. Strand, S.-S. B. Lee, J. von Delft, and A. Georges, Phys. Rev. Lett. 124, 016401 (2020).
[5] A. Gleis, S.-S. B. Lee, A. Weichselbaum, G. Kotliar, and J. von Delft, in preparation.
[6] F. B. Kugler*, S.-S. B. Lee*, and J. von Delft, Phys. Rev. X 11, 041006 (2021). (*: These authors are contributed equally to this work.)
[7] S.-S. B. Lee, F. B. Kugler, and J. von Delft, Phys. Rev. X 11, 041007 (2021).
번호 날짜 장소 제목
540 2017-08-16 16:00  #1322 (E6-2. 1st fl.)  Phonon-driven spin-Floquet valleytro-magnetism file
539 2017-03-24 16:00  #1323 (1st fl. E6-2)  Graphene based nano electronics and nano electromechanics; focusing on precise control of nano structures for studying accurate physical properties
538 2017-03-24 14:30  #1323 (1st fl. E6-2).  Topological Dynamics
537 2017-11-03 14:30  #1323 (1st fl., E6-2.)  Quantum Resistor-Capacitor Circuit with Majorana Edge States file
536 2017-11-03 16:00  #1323 (1st fl., E6-2.)  Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions file
535 2016-06-14 15:00  #1323 (E6-2 1st fl.)  No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets
534 2019-10-29 10:00  #1323 (E6-2, 1st fl.)  Unconventional Spin Transport in Quantum Materials file
533 2018-04-13 10:00  #1323 (E6-2, 1st fl.)  Quantum meets Mechanics: from Quantum Information to Fundamental Research file
532 2018-04-11 16:00  #1323 (E6-2, 1st fl.)  Non-Gaussian states of multimode light generated via hybrid quantum information processing file
531 2019-10-16 16:00  #1323 (E6-2, 1st fl.)  Emergent black holes and monopoles from quantum fields file
530 2019-10-29 16:00  #1323 (E6-2, 1st fl.)  Particles and Gravity via String Geometry file
529 2019-10-31 10:00  #1323 (E6-2, 1st fl.)  Kondo meets Hubbard: Impurity physics for correlated lattices file
528 2018-04-11 13:30  #1323 (E6-2, 1st fl.)  Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
527 2017-09-13 16:00  #1323 (E6-2. 1st fl.)  An Introduction to Quantum Spin Liquids file
526 2017-04-28 16:00  #1323 (E6-2. 1st fl.)  Carbon nanotubes coupled to superconducting impedance matching circuits
525 2017-07-14 15:00  #1323 (E6-2. 1st fl.)  Chiral anomaly in disordered Weyl semimetals file
524 2017-06-02 16:00  #1323 (E6-2. 1st fl.)  Maxwell's demon in quantum wonderland file
523 2017-09-26 11:00  #1323 (E6-2. 1st fl.)  Time-resolved ARPES study of Dirac and topological materials
522 2017-09-12 16:00  #1323 (E6-2. 1st fl.)  Exact Solution for the Interacting Kitaev Chain at Symmetric Point file
521 2017-11-28 16:00  #1323 (E6-2. 1st fl.)  Physics after the lab and the desk: Your work in PRL file