visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-03-11 16:00 
연사  
장소 E6-2. 1st fl. #1501 

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 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)
274 2022-01-18 14:00    Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
273 2022-01-25 15:00    Emulating twisted double bilayer graphene with a multiorbital optical lattice file
272 2022-01-26 13:00    An Introduction to Cohomology groups file
271 2022-02-28 16:00    Spin-based training of optical microscopes
270 2022-03-07 16:00    Climate Physics and Modelling(우리말강의)
269 2022-03-14 16:00    Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
268 2022-03-18 11:00    (응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids file
267 2022-03-21 16:00    Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
266 2022-03-25 11:00    (응집물리 세미나) Hund's metallicity in ruthenate systems file
265 2022-03-28 16:00    Ultimate-density atomic semiconductor via flat bands
264 2022-03-29 10:00    Non-reciprocal phase transitions file
263 2022-03-31 10:00    Weiss fields for Quantum Spin Dynamics file
262 2022-03-31 16:00    (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
261 2022-04-01 16:00    High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
260 2022-04-04- 16:00    New paradigms in Quantum Field Theory
259 2022-04-08 11:00    (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
258 2022-04-11 16:00    Emergence of Statistical Mechanics in Quantum Systems
257 2022-04-13 10:30    Harnessing topology and correlations from singularities in 3d-kagome metals
256 2022-04-14 16:00    (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
255 2022-04-15 11:00    (응집물리 세미나) First-principles studies of polar oxides and their applications file