visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-11-25 11:00 
연사  
장소 E6-2 #1323 
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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
594 2015-07-16 16:00    Next-generation ultrafast laser technology for nonlinear optics and strong-field physics
593 2015-07-16 16:00    KAIST Physics Distinguished Lecture
592 2015-07-23 13:30    Enhanced ZnO based UV photonics and related applications file
591 2015-08-03 10:30    Axion Search
590 2015-08-04 11:00    Propagation of ultrasound through two- and three-dimensional strongly scattering media
589 2015-09-07 15:00    Advanced Optical Materials and Devices at NRL
588 2015-09-07 16:00    Physics Colloquium : 2015 Fall file
587 2015-09-14 14:00    Ultrafast X-ray Studies on Dynamics Matter in Extreme Conditions
586 2015-09-15 16:00    Physics Colloquium : 2014 Fall file
585 2015-10-14 18:00    인터스텔라 영화 속의 물리 file
584 2015-10-15 10:00    Development of Large-Bore, High Field Magnets at the NHMFL
583 2015-10-16 15:00    High Magnetic Fields to Probe the sub-eV range of Particle/Astroparticle Physics - From the OSQAR experiments at CERN up to new perspectives at LNCMI-Grenoble
582 2015-10-16 16:00    Fluctuations of entropy production in partially masked electric circuits
581 2015-10-23 10:30    How to write a good scientific paper[Open lecture series]
580 2015-10-23 15:00    Development of a Rogowski Coil as a new beam position monitor
579 2015-11-06 16:30    Topological Dirac line nodes in centrosymmetric semimetals
578 2015-11-10 16:00    Rapid heating of matter using high power lasers
577 2015-11-19 16:00    Emergent Collective Phenomena and Functions at Reduced Dimensions
576 2015-11-23 13:30    What's Beyond the Standard Model? Lessons from Run I and what might come in Run II
575 2015-11-24 16:00    Topology-based understanding of spin dynamics in inhomogeneously magnetized systems