کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10482045 | 933254 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crossover from fragile liquids to strong liquids near the glass transition created by isotropic two-body short-range interactions
ترجمه فارسی عنوان
متقاطع از مایعات شکننده به مایعات قوی در نزدیکی گذار شیشه ای ایجاد شده توسط تعاملات کوتاه مدت دو طرفه ایزوتروپیک
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کلمات کلیدی
مایعات شکننده، انتقال شیشه، خود نفوذ، تعاملات کوتاه مدت، مایعات قوی،
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
چکیده انگلیسی
The extensive molecular-dynamics simulations on binary mixtures A80B20 with a Stillinger-Weber potential are performed to obtain two types of glass-forming liquids near the glass transition, fragile and strong liquids. The simulations are done for different mass ratios Q(=mB/mA) under the same potential with mA being fixed, where mα denotes a mass of α particle. The simulation results for the self-diffusion coefficient D are then analyzed by two types of master curves recently proposed as D=d0xâ1(1âx)2+ηexp[62x3+η(1âx)2+η] with η=4/3 for fragile liquids and 5/3 for strong liquids, where x is a reduced inverse temperature and d0 a positive constant. Then, it is shown that for QQc they obey the strong master curve with η=5/3, where Qcâ20. The structural relaxation time Ïα and the β-relaxation time Ïβ are also shown to obey the power laws recently proposed as Ïαâ¼Dâ(1+μ) and Ïβâ¼Dâ(1âμ) in a supercooled region, respectively, while Ïαâ¼Ïβâ¼Dâ2/3 in a liquid region, where μ=2/(3(η+2)). Here μâ1/5 for fragile liquids and 2/11 for strong liquids. These situations are exactly the same as those in usual glass-forming liquids. Thus, it is emphasized that two types of glass-forming liquids can be simply created by simple short-range potentials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 392, Issue 14, 15 July 2013, Pages 2999-3007
Journal: Physica A: Statistical Mechanics and its Applications - Volume 392, Issue 14, 15 July 2013, Pages 2999-3007
نویسندگان
Michio Tokuyama, Shohei Enda,