title: Role of Structure and Entropy in Determining Differences in Dynamics for Glass Formers with Different Interaction Potentials.
abstract: We present a study of two model liquids with different interaction potentials, exhibiting similar structure but significantly different dynamics at low temperatures. By evaluating the configurational entropy, we show that the differences in the dynamics of these systems can be understood in terms of their thermodynamic differences. Analyzing their structure, we demonstrate that differences in pair correlation functions between the two systems, through their contribution to the entropy, dominate the differences in their dynamics, and indeed overestimate the differences. Including the contribution of higher order structural correlations to the entropy leads to smaller estimates for the relaxation times, as well as smaller differences between the two studied systems.
authors.affiliation: Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411008, India.
authors.forename: Atreyee
authors.initials: A
authors.lastname: Banerjee
authors.affiliation: TIFR Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500075, India.
authors.forename: Shiladitya
authors.initials: S
authors.lastname: Sengupta
authors.affiliation: TIFR Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500075, India and Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Campus, Bengaluru 560064, India.
authors.forename: Srikanth
authors.initials: S
authors.lastname: Sastry
authors.affiliation: Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411008, India.
authors.forename: Sarika Maitra
authors.initials: SM
authors.lastname: Bhattacharyya