visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-07-08 14:00 
일시 Jul. 08 (Fri.) 2PM 
장소 #1323(E6-2. 1st fl.) 
연사 Dr. Junhyun Lee, Harvard University 

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 장소 제목
347 2022-06-03 09:30  Online seminar  (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
346 2018-10-11 16:00  #1323, E6-2  Dirac electrons in a graphene quasicrystal file
345 2019-10-29 14:30  #1323, E6-2  Quantum sensing file
344 2019-05-02 16:00  #1323, E6-2  Anomalous optical properties of halide perovskites file
343 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
342 2018-09-20 16:00  #1323, E6-2  Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
341 2018-09-20 16:00  #1323, E6-2  Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
340 2018-10-18 16:00  #1323, E6-2  Applications of nonlinear optics for condensed matter researches file
339 2018-05-09 16:00  #1323, E6-2  Recent advances in thermoelectric bulk composites file
338 2017-01-09 16:00  Lecture Hall, College of Natural Sciences [#1501,E6-2]  Topological Defects and Phase Transitions" file
337 2016-07-28 16:00  #1323(E6-2. 1st fl.)  Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
336 2019-04-23 16:00  #1323, E6-2  From Mott physics to high-temperature superconductivity file
335 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
334 2019-11-14 16:00  #1323, E6-2  Semi-classical model of polariton propagation file
333 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
332 2019-11-07 16:00  #1323, E6-2  Integrated quantum photonics with solid-state quantum emitters file
331 2018-05-29 16:00  #1323, E6-2  Investigation on metal nanostructure/semiconductor junction and its applications file
330 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
329 2018-07-13 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Loop Induced Single Top Partner Production and Decay at the LHC
328 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file