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Heat capacity and relaxation dynamics of glassy films: A lattice model study

Zhai, Qiang, Gao, Xin-Yuan, Deng, Hai-Yao ORCID: https://orcid.org/0000-0001-6065-483X, Lee, Chun-Shing, Yang, Sen, Yan, Ke and Lam, Chi-Hang 2025. Heat capacity and relaxation dynamics of glassy films: A lattice model study. Physical Review E 111 (1) , 015406. 10.1103/PhysRevE.111.015406

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Abstract

We study the calorimetric properties and structural relaxation of glassy films using a distinguishable particle lattice model (DPLM). We determine the glass transition temperature versus film thickness from the heat capacity during heating as well as from the local relaxation time. The results based on both approaches are in good agreement with the experimentally observed Keddie-Cory-Jones relation. The thus demonstrated interplay between calorimetric properties and structural relaxation is further corroborated by successfully reconstructing the simulated heat capacity during heat and cooling from the local relaxation times. Our results suggest DPLM as a useful lattice model for studying glassy films.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Physical Society
ISSN: 2470-0045
Date of First Compliant Deposit: 7 January 2025
Date of Acceptance: 9 December 2024
Last Modified: 08 Jan 2025 16:00
URI: https://orca.cardiff.ac.uk/id/eprint/175075

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