visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-03-11 16:00 
일시 2016/03/11 4 PM 
장소 E6-2. 1st fl. #1501 
연사 Dr. Tae-Hwan KIM (POSTECH) 

Jan. Switching handedness of of chiral solitons in Z4 topological insulators

 

Dr. Tae-Hwan KIM (POSTECH)

Mar. 11 (Fri.), 4:00 PM, E6-2. 1st fl. #1501

 

Chirality is a ubiquitous and interesting phenomenon in fields ranging from biology, chemistry to physics. In condensed matter, chirality can be topologically protected by the system’s symmetry and thus can be used to carry information robustly against external perturbations. For instance, magnetic skyrmions have been investigated intensively as topological information carriers for next generation spintronic devices. However, logic operations using topological excitations are only conceptually proposed. On the other hand, chiral solitons are recently discovered as the topologically protected edge states of one-dimensional Z4 topological insulators [1,2], which can be exploited as topological information carriers in electronic system. In this talk, I show experimentally and directly that switching between solitons with different chirality is possible by merging them with achiral soliton [3]. This switching corresponds to the realization of topological addition of the Z4 topological number. With their distinct topologically protected chirality, chiral solitons could uniquely be exploited for robust multilevel information storage and logic operation by storing, carrying, and switching three differently topological bits of information.

 

[1] T.-H. Kim and H. W. Yeom, Phys. Rev. Lett. 109, 246802 (2012).
[2] S. Cheon, T.-H. Kim, S.-H. Lee, and H. W. Yeom, Science 350, 182 (2015).
[3] T.-H. Kim et al. to be submitted

 

Contact: Heung Sun Sim, Physics Dept., (hs_sim@kaist.ac.kr)

번호 날짜 장소 제목
359 2024-04-11 16:00  E6-2, Rm#1323  Theoretical Studies of the Electric Field Induced Thermal Hall Effect in the Quantum Dimer Magnets XCuCl3 (X = Tl, K)
358 2016-04-06 15:30  E6-2, RM #1323  Superconducting Quantum Interference Devices for Precision Detection
357 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
356 2015-10-15 10:00  E6-2, 5th fl. #5318  Development of Large-Bore, High Field Magnets at the NHMFL
355 2015-10-16 15:00  E6-2, 5th fl. #5318  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
354 2018-06-14 10:00  E6-2, 2nd fl. #2502  Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation file
353 2019-07-03 15:00  E6-2, 2501  Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file
352 2016-03-11 13:30  E6-2, 1501 외  Physics Seminar Serises : 2016 Spring file
351 2015-07-16 16:00  E6-2, 1501  KAIST Physics Distinguished Lecture
350 2015-07-16 16:00  E6-2, 1318  Next-generation ultrafast laser technology for nonlinear optics and strong-field physics
349 2015-10-23 15:00  E6-2, #5318  Development of a Rogowski Coil as a new beam position monitor
348 2015-11-06 16:30  E6-2, #5318  Topological Dirac line nodes in centrosymmetric semimetals
347 2020-02-12 13:00  E6-2, #5318  From inflation to new weak-scale file
346 2023-11-22 10:00  E6-2, #5301 & zoom  [High Energy Theory Seminar] Exact Quantum Algorithms to Recognize Quantum Phases of Matter
345 2023-06-01 16:00  E6-2, #5301  Hall viscosity and topological phenomena
344 2023-10-04 16:00  E6-2, #2502  [High-Energy Theory Seminar] Moving towards quantum technologies: the case of quantum batteries
343 2023-04-05 16:00  E6-2, #2502  [High Energy Theory Seminar]Anomalies of Discrete 1-Form Symmetries in QCD-like Theories
342 2023-05-31 16:00  E6-2, #2502  [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
341 2023-03-22 16:00  E6-2, #2502  (High Energy Theory Seminar) Boltzmann or Bogoliubov? A Case of Gravitational Particle Production
340 2023-09-13 16:00  E6-2, #2502  [High Energy Theory Seminar] Cosmic Birefringence from Dark Photon