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
226 2022-01-25 15:00  E6 #1501/online  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
225 2022-01-18 14:00  KI bldg. 5th fl. Room B501 & Zoom  Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
224 2022-01-17 14:00  E6-2 Room 2502  Five Lectures on Observational Probes of Dark Energy file
223 2023-01-12 14:40  E6-2 #1323  JILA 1D Wannier-Stark optical lattice clock file
222 2022-01-11 15:00  E6 #1501  Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
221 2024-01-03 11:00  E6-2, #1323  Interplay of Strong Correlations, Topology, and Disorder in 2D Quantum Matters
220 2024-01-25 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP seminars] Detecting Gravitational Waves by Elecromagnetic Cavity
219 2024-01-24 15:00  E6-2 #1323  Determination of single molecule loading rate during mechanotransduction file
218 2024-01-16 16:00  E6-2, #2502  [High Energy Theory Seminar] Towards quantum black hole microstates
217 2022-01-12 11:00  Zoom and E6 #1323  Spectroscopic study of trapped ions towards probing dark matter and new physics file
216 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
215 2020-02-20 16:00  #1323, E6-2  Unconventional superconductivity in the locally non-centrosymmetric heavy-fermion CeRh2As2 file
214 2020-02-13 16:30  E6-6, #119  Enhanced Light-Matter Interactions in Graphene with Noble Metal Plasmonic Structures file
213 2020-02-12 13:00  E6-2, #5318  From inflation to new weak-scale file
212 2021-02-17 09:00  Online  석학 대중 강연 및 강의 시리즈 file
211 2024-02-16 10:00  E6, #1323  Optical conductivity of superconducting states driven by Van Hove singularities
210 2021-02-15 17:00  Zoom  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
209 2023-02-28 11:00  E6 Room(#1322)  Topotactic redox engineering toward novel material file
208 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
207 2021-02-02 14:30  Zoom  Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file