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 1091972
79 <11/27> 중성자로 보는 작은 세상 속 큰 물리 2009.11.24 100058
78 <11/4>Plasmonic Properites of Metallic Nanostructures 2009.10.30 97033
77 <10/9> Smearing effect of membrane in plane-wave matrix model 2009.10.05 100496
76 <10/15> An Ideal Mean-Field Transition in a Driven Interacting System 2009.09.30 110431
75 <9/15> Resistance Switching Behavior of Epitaxially Grown NiO Thin Films 2009.09.07 166233
74 <8/11>Cooking up elements in the universe: Recent activities at HRIBF 2009.08.11 114401
73 <8/5>Brane superpotential via local Calabi-Yau spaces 2009.08.03 124317
72 <7/15> Experiment for Discoveries of Extrasolar Planets 2009.07.13 103971
71 <7/17> Atomic-scale polar oxide heterostructures: Growth and interfacial properties 2009.07.13 110319
70 <7/8> 신물질 고온초전도 초청강연 2009.06.26 90150
69 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 265266
» <6/17> Molecular dynamics simulation to study amorphous structure of Ge2Sb2Te5 2009.06.03 88378
67 <6/18> Multiferroics: Magnetism-driven Ferroelectricity 2009.05.27 123486
66 <5/11>Emergent Geometry as Quantum Gravity 2009.05.07 103014
65 <4/30> Updates on warped brane inflation 2009.04.21 125791
64 <4/27> BPS Vortices in Non-relativistic M2-brane Chern-Simons-matter Theory 2009.04.21 81902
63 <4/21> Experimental and Observational Astrophysics in the Infrared Wavebands 2009.04.17 133149
62 <4/20> Chern-Simons gauge theories and M2 brane CFTs 2009.04.09 78068
61 <4/14> X-ray absorption fine structure analyses on amorphous oxide films 2009.04.06 131661
60 <3/26>A perturbative & non-perturbative test of ABJM model 2009.03.19 92867