logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다. .


4시 20분부터 제1과학관 31214 e+강의실에서 간단한 다과를 제공합니다.


아 래



Title: Chiral solitons for topological informatics


Speaker: 염   한   웅  교수님 (Center for Artificial Low Dimensional Electronic Systems,(IBS) / POSTECH )


Date & Time: Nov. 30(Wed.) 2016, 4:30 PM


Place: Natural Science 1,  Room No. 31214


Abstract: Storing and manipulating information in robust ways is of prime interest in wide areas of science and technology. Using topologically protected local excitations, such robust imformatics may be realized. In magnetic information processing, the recent interest is focused on topological excitations of spins such as skyrmions. In electronic systems, Mayorana Fermions of topological edge states are expected to realize topological quantum computation. This talk reviews our recent approach to this issue, dealing with new types of solitons in an electronic system, which are realized in an indium atomic wire array on Si(111) in its charge density wave ground state [1]. Due to the wire’s unique double Peierls chain structure, this system constitutes an unprecedented Z4 topological insulator and its edge states are three distinct solitons with chiral dimension [2]. These chiral solitons can store quarternary bit information protected topologically. Moreover, the switching between solitons is observed, which corresponds to the algebraic operation embedded into the Z4 topology [3]. This system may provide a novel device platform for topological multi-bit informatics.

[1] T.-H. Kim and H. W. Yeom, Phys. Rev. Lett. 109, 246802 (2012).
[2] S. M. Cheon, S.-H. Lee, T.-H. Kim and H. W. Yeom, Science 350, 6257 (2015).
[3] T.-H. Kim, S. M. Cheon, and H. W. Yeom, under review.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1092043
218 <Oct. 5(Wed.) 4:30 PM> 국제원자력기구 (IAEA)와 핵데이터 2016.09.22 64072
217 <10/13(Thu.) 13:00>기술융합을 통한 의료혁명과 물리학의 역할 2016.09.29 79895
216 <Oct. 12(Wed.) 4:30 PM> Silk as a biocompatible optical material 2016.10.05 67022
215 <10/12(Wed.) 11:00am>Unconventional Superconductivity: From History to Mystery 2016.10.10 91516
214 <10/25(Tue.) 11:00am>Crystallization of Water under Modulating Pressures 2016.10.10 64407
213 <10/11(Tue.) 15:00>Analysis of Individual Terrestrial Gamma-ray Flashes 2016.10.10 75308
212 <Oct. 19(Wed.) 10:00 AM> Hyper-Kamiokande project -The future of neutrino physics in Japan 2016.10.12 64091
211 <10/25(Tue.) 11:00am>Crystallization of Water under Modulating Pressures 2016.10.14 64891
210 <Nov. 2(Wed.) 4:30 PM> 현대 우주론 이론과 관찰 (Theories and observations of modern cosmology) 2016.10.19 56179
209 <Nov. 9(Wed.) 4:30 PM> 20-nm resolution imaging of brain circuitry by next-generation expansion microscopy 2016.11.02 54806
208 <Nov. 16(Wed.) 4:30 PM> Two-dimensional Chiral Materials and Topological Insulators 2016.11.10 204953
207 <Nov. 23(Wed.) 4:30 PM> Dry (Plasma) etch process in Semiconductor Device 2016.11.16 63292
» <Nov. 30(Wed.) 4:30 PM> Chiral solitons for topological informatics 2016.11.23 82802
205 <Dec. 7(Wed.) 4:30 PM>Mechanotransduction of cells in vitro(세포기능의 역학적 조절) 2016.11.30 85391
204 <12/2(Fri.) 14:00>Overview of HIMAC facility 2016.12.01 56387
203 <Dec. 14(Wed.) 4:30 PM>중력과 양자 얽힘 (tentative) 2016.12.07 54944
202 2017학년도 1학기 콜로퀴움 일정 2017.01.05 337004
201 <Mar. 15(Wed.) 4:30 PM>반도체 Fab Process와 물리학 전공자 2017.03.14 54800
200 <Mar. 22(Wed.) 4:30 PM>Symmetry and topology in the electronic structure of solids 2017.03.15 57371