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
451 2016-06-16 16:00  #1323(E6-2, 1st fl.)  Quantum information processing using quantum dots and photonic crystal cavities
450 2016-07-07 14:00  #1323(E6-2. 1st fl.)  Let there be topological superconductors
449 2016-07-08 11:00  #1323(E6-2. 1st fl.)  Isostatic magnetism
448 2016-07-08 14:00  #1323(E6-2. 1st fl.)  Electronic quasiparticles in the quantum dimer model
447 2016-07-28 16:00  #1323(E6-2. 1st fl.)  Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
446 2016-08-04 14:30  KAIST Natural Science Building (E6-5), EDU 3.0 Room(1st fl.)  Relational Logic (with applications to Quantum Mechanics, String Theory, Cosmology, Neutrino Oscillations, Statistical Mechanics)
445 2016-09-02 14:30  E6-2(1st fl.), #1323  Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
444 2016-09-02 16:00  E6-2(1st fl) #1323  Quantum Electrical Transport in Topological Insulator Nanowires
443 2016-09-05 16:00  Natual Scien Bldg.(E6)m #1501  Physics Colloquium : 2016 Fall file
442 2016-09-21 16:00  E6-2. #2502(2nd fl.)  Entanglement probe of two-impurity Kondo physics
441 2016-09-22 15:30  #1323(E6-2, 1st fl.)  Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
440 2016-09-22 15:30  #1323(E6-2, 1st fl.)  Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
439 2016-09-29 16:00  E6-2, #1323  2016 Fall, Physics Seminar Serises file
438 2016-09-29 16:00  E6-2 #1323 (1st floor)  Large-scale Silicon Photonic MEMS Switches
437 2016-09-29 16:00  E6-2. #2501(2nd fl.)  Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
436 2016-10-07 13:30  E6-2. #1323(1st fl.)  “Symmetry and topology in transition metal dichalcogenide?”
435 2016-10-07 16:00  E6-2. #1323(1st fl.)  “Tilt engineering of 4d and 5d transition metal oxides?”
434 2016-10-17 11:00  #1323,(E6-2, 1st fl.)  IMS and examples of the studies on optoelectronic materials
433 2016-10-18 13:30  1st fl. #1323(E6-2)  "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
432 2016-10-18 15:00  E6-2. 1st fl. #1323  “Hybrid quantum systems with mechanical oscillators”