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)
315 2020-10-16 14:30    Nanoscale magnetic resonance detection towards nano MRI file
314 2020-10-16 16:00    Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
313 2020-10-23 14:00    Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
312 2020-11-12 16:00    2020 가을학기 광학분야 특별세미나
311 2020-11-17 12:00    Quantum- & Nano-Photonics" 세미나 시리즈 file
310 2020-11-20 14:30    Lumpy Cooper pairs in an iron-based superconductor
309 2020-11-20 16:00    Coherent control of field gradient induced quantum dot spin qubits
308 2020-11-26 16:00    2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
307 2020-12-02 10:00    Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
306 2020-12-09 10:00    Searching for the QCD axion with the ARIADNE experiment file
305 2020-12-10 13:55    Consistency of Boltzmann equation and light dark matter from inflaton decay
304 2020-12-11 14:30    Antisymmetric interlayer exchange coupling in magnetic multilayers
303 2020-12-11 16:00    Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
302 2020-12-23 10:00    Online workshop for Quantitative Phase Imaging file
301 2021-01-28 15:00    Topological Transport of Deconfined Hedgehogs in Magnets file
300 2021-01-28 18:00    Quantum metamaterials: concept, theory, prototypes and possible applications file
299 2021-02-02 14:30    Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
298 2021-02-15 17:00    Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
297 2021-02-17 09:00    석학 대중 강연 및 강의 시리즈 file
296 2021-03-02 16:00    Sensitive terahertz detection with graphene-based transistors file