logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다. 아 래 제목: Molecular dynamics simulation to study amorphous structure of Ge2Sb2Te5 연사: 한 승 우 교수 (이화여자대학교) 일시: 2009년 6월 17일(수) 오후 3시 장소: Seminar room(31355) on the third floor 초록: The phase-change random access memory (PRAM) is intensively studied as the next-generation nonvolatile memory that will replace the current flash memory. The working principle of PRAM is based on the phase-change phenomena of chacolgenide material, most notably Ge2Sb2Te5, between the crystalline and amorphous phases. The amorphous structure of Ge2Sb2Te5 has been under intensive researches recently. In particular, the molecular dynamics (MD) simulation can directly emulate the phase transition phenomena in the actual device, which occurs over a few nanoseconds. In this presentation, we introduce our recent MD calculations to study the amorphous structures of Ge2Sb2Te5. The amorphous structure is obtained by melt-quenching the liquid Ge2Sb2Te5. We vary the simulation condition such as volume and quenching rate and discuss how the results are affected by these parameters. The analysis on the electronic structure indicates that the energy gap of the amorphous structure increases with the simulation cell volume, which can explain the resistance drift of PRAM. 46627836794662783679
번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1090975
162 <2/16>Hamiltonian formalism 2011.02.11 90778
161 <10/8 (월)>물리학과 특별세미나 개최 안내 2012.10.05 90772
160 <7월27일>Correlated topological phases in 3D complex oxides via Green's functions 2012.07.27 90707
159 <1/17>Quantum criticality and superconductivity 2008.01.16 90532
158 <7/21> Next generation cryogenic free 1.5T MgB2-magnet based MRI 2010.07.20 90405
157 <May.27(Fri.) 10:00> Towards Magnetic 2D Materials 2016.04.27 90315
156 <7/8> 신물질 고온초전도 초청강연 2009.06.26 89925
155 <10/23> Measuring Transfer Reactions with Radioactive Beams 2012.10.15 89652
154 <9/10> Nanomaterials for Biotech Applicastions 2007.09.05 88510
153 <1/25> Perturbation during Inflation 2011.01.19 88482
» <6/17> Molecular dynamics simulation to study amorphous structure of Ge2Sb2Te5 2009.06.03 88321
151 <12/12> lattice structure in holographic models 2012.12.12 87932
150 <11/6>Intel’s current 65 nm semiconductor process technology and the direction.... 2006.11.08 87658
149 <6/21> Nuclear Astrophysics in Effective Field Theories 2012.06.20 87535
148 <Aug. 4(Wed.)>Electronic Properties of Mixed-dimensional 2D/3D Heterostructures 2021.08.04 87430
147 <5/19> High Energy Physics and The Gas Electron Multiplier Detector Technology 2008.05.15 87094
146 <10/26>Dark-enrgy and Accelerating Universe(Some theoretical approaches) 2006.10.25 86899
145 <9/7> Solitons in the Higgs phase 2006.09.05 86869
144 <10/18(Thu.) 1:30pm>Machine Learning Approaches for Solving Physics Problems: Usability of Experimental Data 2018.10.15 85419
143 <2/14> Basics of Gravitational Perturbatiosn 2011.02.11 85288