visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2024-06-12 16:00 
연사  
장소 E6-2, #1323 

아래와 같이 세미나를 개최하고자 하오니, 관심있는 분들의 많은 참석 부탁드립니다.

 

Date: 4:00 pm, 12th Jun (Wed)
Place: E6-2, #1323
Speaker: Dr. Hanbit Oh (Department of Physics and Astronomy, Johns Hopkins University)
Title: New high Tc superconductivity and symmetric pseudogap metal in the bilayer nickelate La3Ni2O7-Part2
Abstract: 

The recent discovery of an 80 K superconductor in La3Ni2O7 has attracted considerable interest. While numerous theoretical frameworks have been proposed, most assume that bilayer nickelates reside in the Mott-Hubbard regime. However, recent experiments suggest that La3Ni2O7 may belong to the charge transfer regime.  In the first part of the talk, I present the charge transfer regime of the bilayer nickelates by accounting for doped holes entering the oxygen p orbitals. Interestingly, we show that the Zhang-Rice doublon state emerges as the proper low-energy degrees of freedom for the hole-doped state, distinct from the Zhang-Rice singlet in hole-doped cuprates [3].  The low energy theory in the charge transfer regime is also demonstrated as a bilayer type-II t-J model previously proposed in the Mott- Hubbard regime. Given the richness of this physics, there is a natural desire to simulate the superconductivity using programmable quantum simulators to explore diverse physics phenomena. In the second part of the talk, I present a theoretical proposal to utilize the tetralayer optical lattice systems with ultracold atoms to simulate novel bilayer nickelate superconductors. Notably, the synthetic Kondo interaction simulated in the cold atom system is antiferromagnetic, contrasting with the ferromagnetic Hund coupling inherent in nickelate materials. This difference in the sign of the Kondo interaction enhances the pairing gap, equivalently to Tc allowing us to detour the challenge of reaching ultra-low temperatures in cold atom experimental setups. We further propose a signature to identify the pairing state can be applied to the snapshot measurements.

[1] Hanbit Oh and Ya-Hui Zhang, Phys. Rev. B 108 (2023)

[2] Hui Yang*, Hanbit Oh*, Ya-Hui Zhang, arXiv:2309.15095 (2023)

 

[2] Hanbit Oh, Boran Zhou, Ya-Hui Zhang, arXiv:2405.00092 (2024)

번호 날짜 연사 제목
공지 2025-04-29 10:00  Dr. Yeonju Go (Brookhaven National Laboratory)  Exploring the Hottest Matter in the Universe: Quark-Gluon Plasma through Hard Probes and Artificial Intelligence
공지 2025-05-01 16:00  Dr. Inwook Kim (Lawrence Livermore National Laboratory)  BSM Physics Search with Quantum Sensors
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
608 2025-05-28 16:00  Dr. Thiago L. M. Guedes (Forschungszentrum Jülich)  Computing the graph-changing dynamics of loop quantum gravity file
607 2025-05-26 16:00  윤석호 박사(삼성종합기술원)  Photonics in the Age of AI: Industry Trends and Perspectives file
606 2025-05-23 11:00  천상모 교수(한양대학교)  Superconductivity in Topological Materials file
605 2025-05-22 16:00  유현승 박사(삼성종합기술원)  Reconstructing Reality: Learning-based Methods for 3D Imaging and Graphics file
604 2025-05-22 14:30  Prof. Keun Su Kim (The Univ. of Yonsei)  Sublattice-interference model for Fermi arcs in cuprates file
603 2025-05-15 16:00  노찬 박사(KAIST)  Generation of multimode Gaussian quantum states and their applications for quantum computing file
602 2025-05-13 16:00  Mr. Heonjoon Park(Univ. Washington, USA)  Fractional Quantum Anomalous Hall Effect file
601 2025-05-02 11:00  Prof. Joonho Jang  Anderson localization of electrons in a moire-of-moire lattice of helical twisted trilayer graphene file
600 2025-04-29 16:00  Dr. Tokuro Shimokawa (Okinawa Institute of Science and Technology)  Can experimentally-accessible measures of entanglement distinguish quantum spin liquid and random singlet phases? file
599 2025-04-28 16:00  지명국 (연세대 천문우주학과)  Galaxy Cluster Collisions as Cosmic Laboratories for Dark Matter file
598 2025-04-22 16:00  Dr. Nanse Esaki (The University of Tokyo)  Spin Nernst and thermal Hall effects of topological triplons in quantum dimer magnets on the maple-leaf and star lattices file
597 2025-04-22 13:30  Dr. Chaebin Kim (Georgia Institute of Technology)  Emulation of quantum correlations by classical dynamics in quantum magnets file
596 2025-04-21 16:00  Prof. Ambrose Sungseok Seo (Univ of Kentucky)  Condensed matter physics? All you gotta do is just meet me at the ... file
595 2025-04-16 13:00    오가노이드 사이언스(주) 여섯번째 세미나 시리즈 file
594 2025-04-11 11:00  조상연 박사(Wellman Center for Photomedicine)  Semiconductor Nanolaser Particles: The Building Blocks of Next-Generation, Highly Multiplexed Photonic Systems file
593 2025-04-11 11:00  옥종목 교수 (부산대학교 물리학과)  An Approach to Controlling Physical Properties:Defect-Engineered High-Quality Single Crystal Growth file
592 2025-04-04 12:00  조길영 교수(KAIST)  Theoretical Kaleidoscope of Quantum Material Research: From Quantum Field Theory and Quantum Information to Future Devices file
591 2025-04-03 16:00  윤홍 박사 (Corning Technology Center Korea)  Introduction of Corning Glass Innovation file