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 1088945
495 <12/2(Fri.) 14:00>Overview of HIMAC facility 2016.12.01 56243
494 <Dec. 7(Wed.) 4:30 PM>Mechanotransduction of cells in vitro(세포기능의 역학적 조절) 2016.11.30 85007
» <Nov. 30(Wed.) 4:30 PM> Chiral solitons for topological informatics 2016.11.23 82518
492 <Nov. 23(Wed.) 4:30 PM> Dry (Plasma) etch process in Semiconductor Device 2016.11.16 63095
491 <Nov. 16(Wed.) 4:30 PM> Two-dimensional Chiral Materials and Topological Insulators 2016.11.10 204379
490 <Nov. 9(Wed.) 4:30 PM> 20-nm resolution imaging of brain circuitry by next-generation expansion microscopy 2016.11.02 54684
489 <Nov. 2(Wed.) 4:30 PM> 현대 우주론 이론과 관찰 (Theories and observations of modern cosmology) 2016.10.19 56069
488 <10/25(Tue.) 11:00am>Crystallization of Water under Modulating Pressures 2016.10.14 64558
487 <Oct. 19(Wed.) 10:00 AM> Hyper-Kamiokande project -The future of neutrino physics in Japan 2016.10.12 63945
486 <10/11(Tue.) 15:00>Analysis of Individual Terrestrial Gamma-ray Flashes 2016.10.10 73880
485 <10/25(Tue.) 11:00am>Crystallization of Water under Modulating Pressures 2016.10.10 64055
484 <10/12(Wed.) 11:00am>Unconventional Superconductivity: From History to Mystery 2016.10.10 90190
483 <Oct. 12(Wed.) 4:30 PM> Silk as a biocompatible optical material 2016.10.05 66759
482 <10/13(Thu.) 13:00>기술융합을 통한 의료혁명과 물리학의 역할 2016.09.29 79563
481 <Oct. 5(Wed.) 4:30 PM> 국제원자력기구 (IAEA)와 핵데이터 2016.09.22 63864
480 <Sep. 21(Wed.) 4:30 PM>광자질량의 물리학 2016.09.19 56721
479 <Sep. 7(Wed.) 4:30 PM>Manipulating spins in topological insulators 2016.09.02 90624
478 <9/22(Thu.) 10:30> Bulk-boundary correspondence from the inter-cellular Zak phase 2016.08.29 75383
477 2016학년도 2학기 콜로퀴움 일정 2016.08.02 96998