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)
505 2022-01-26 13:00    An Introduction to Cohomology groups file
504 2018-10-12 16:00    Direct observation of a two-dimensional hole gas at oxide interfaces file
503 2022-11-18 14:30    Kondo cloud condensation in a highly-doped semiconductor metal file
502 2025-05-01 16:00  Dr. Inwook Kim (Lawrence Livermore National Laboratory)  BSM Physics Search with Quantum Sensors file
501 2018-12-26 16:00    Brane-like defect in 3D toric code file
500 2019-07-31 16:00    Features of ballistic superconducting graphene file
499 2018-07-12 17:00    The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
498 2016-12-09 13:30    Entanglement area law in strongly-correlated systems
497 2023-11-23 16:00    Deciphering the Enigma of Quantum Materials by X-ray Scattering and Spectroscopy
496 2019-10-16 16:00    Emergent black holes and monopoles from quantum fields file
495 2022-07-14 13:30    Electronic structure and anomalous transport properties of topological materials by first principle calculation
494 2016-11-24 16:00    Harmonic oscillator physics with single atoms in a state-selective optical potential
493 2015-09-07 15:00    Advanced Optical Materials and Devices at NRL
492 2021-05-14 16:00    Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
491 2016-04-12 16:00    Confinement of Superconducting Vortices in Magnetic Force Microscopy
490 2017-04-28 14:30    Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
489 2015-12-11 15:45    Dynamical mean field theory studies on heavy fermion system
488 2023-10-19 11:00    Emergent functionalities of iridium oxide films with different growth orientation file
487 2023-06-26 11:00    Quantum computing on magnetic racetracks with flying domain wall qubits
486 2019-04-19 11:00    First-principles studies of semiconductors for solar cell applications file