visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-07-08 14:00 
연사  
장소 #1323(E6-2. 1st fl.) 

Electronic quasiparticles in the quantum dimer model


Jul. 08 (Fri.) 2PM, #1323(E6-2. 1st fl.)
Dr. Junhyun Lee, Harvard University


We study a recently proposed quantum dimer model for the pseudogap metal state of the cuprates. The model contains bosonic dimers, representing a spin-singlet valence bond between a pair of electrons, and fermionic dimers, representing a quasiparticle with spin-1/2 and charge +e. By density matrix renormalization group calculations on a long but finite cylinder, we obtain the ground state density distribution of the fermionic dimers for a number of different total densities. From the Friedel oscillations at open boundaries, we deduce that the Fermi surface consists of small hole pockets near (π/2, π/2), and this feature persists up to doping density 1/16. We also compute the entanglement entropy and find that it closely matches the sum of the entanglement entropies of a critical boson and a low density of free fermions. Our results support the existence of a fractionalized Fermi liquid (FL*) in this model.


Contact: Eun Gook Moon, Physics Dept., (egmoon@kaist.ac.kr)

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)
465 2015-12-17 11:00    Wavefront engineering for in-vivo Deep brain imaging
464 2022-12-20 16:00    Studying Baryonic Flow Across the Cosmic Scales Using Radio and Millimeter Wavelength Experiments
463 2016-10-18 15:00    “Hybrid quantum systems with mechanical oscillators”
» 2016-07-08 14:00    Electronic quasiparticles in the quantum dimer model
461 2015-11-24 16:00    Topology-based understanding of spin dynamics in inhomogeneously magnetized systems
460 2022-04-01 16:00    High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
459 2018-11-29 16:00    양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file
458 2024-03-07 16:00    [CAPP seminars] Development of Superconducting Transition Edge Sensors at SRON file
457 2021-06-11 16:00    Pseudogap in surface-doped black phosphorus file
456 2016-11-11 13:30    Bandgap Engineering of Black Phosphorus
455 2016-04-01 14:30    Interference of single charged particles without a loop and dynamic nonlocality
454 2016-05-31 16:00    Understanding 3D tokamak physics towards advanced control of toroidal plasma
453 2023-07-18 11:00    Non-Hermitian Casimir Effect of Magnons
452 2024-06-13 16:00    Magnonic $\varphi$ Josephson junction and its non-Hermitian Josephson diode effect
451 2023-09-14 16:00    [CAPP seminar] Dark matter searches in Water Cherenkov Detectors file
450 2018-05-11 14:30    Disordered Floquet topological insulators file
449 2016-12-09 16:00    Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator
448 2022-05-13 14:30    Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
447 2021-07-29 14:00    Gravitationally Induced Dark Sector and Inflationary Dynamics file
446 2015-12-11 13:30    Quantum spin liquid in the 1/3 depleted triangular lattice Ba3(Ru1-xIrx)Ti2O9