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 1090236
378 <5/2> Electrical Instability in Nanoscale Channel Devices: Top-down & Bottom-up Approaches 2012.04.19 85584
377 <5/9> Searching for 5th dimension 2012.05.03 74584
376 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 281111
375 <5/23> 나노구조 산화물 재료의 기능성-용매화전자에서 전자화합물까지... 2012.05.17 174015
374 <5/30> Dark Energy 2012.05.23 72242
373 <6/13> Efficient hybrid organic-inorganic light emitting diodes by surface modification of metal oxides 2012.06.01 80381
372 2012학년도 2학기 콜로퀴움 일정 안내 2012.09.03 71272
371 <9/5> Extreme Universe: Extreme Energy, Burst, Physics in Space 2012.09.03 79547
370 <9/12> Observation of Higgs Particle at CERN 2012.09.07 83606
369 <9/19> Novel mechanical degree of freedom at nanoscales 2012.09.13 93162
368 <9/26> Organic Polymers as Nuclear Radiation Sensors 2012.09.20 148489
367 <10/10> Spin transistor : Detection and manipulation of spin transport in semiconductor 2012.09.27 105151
366 <10/17> The Interface Induced Magnetism 2012.10.11 89446
365 <10/31> Large-Scale Quantitative Analysis of Painting Arts 2012.10.18 212043
364 <11/7> Two- and three- body problems in classic and quantum mechanics 2012.10.29 86271
363 <11/14> Next Generation LED 2012.11.08 68266
362 <11/21> 복잡 산화물 이종접합 및 다강체 연구(Complex oxide heterostructures and multiferroics) 2012.11.15 97079
361 <11/28> 별이 빛나는 밤에… 2012.11.22 71628
360 <12/5> 과학용어와 의학용어에 숨겨진 이야기 2012.11.28 72326
359 <12/12> 자성체의 스커미온 동역학 2012.12.06 72807