Influences of Structure Disorder and Temperature on Properties of Proton Conductivity in Hydrogen-Bond Molecular Systems

• Published in: Communications in theoretical physics Vol. 47; no. 2; pp. 235 - 243
• Main Author: PANG Xiao-Feng YU Jia-Feng
• Format: Journal Article
• Language: English
• Published: IOP Publishing 15.02.2007; Institute of Life Science and Technology,University of Electronic Science and Technology,Chengdu 610054,China; International Centre for Materials Physics,the Chinese Academy of Sciences,Shenyang 110015,China%Institute of Life Science and Technology,University of Electronic Science and Technology,Chengdu 610054,China
• Subjects: 氢键分子系统; 结构无续; 质子传导性质; temperature; proton conductivity; hydrogen bonded system; structure disorder
• ISSN: 0253-6102
• DOI: 10.1088/0253-6102/47/2/010

The dynamic properties of proton conductivity along hydrogen-bonded molecular systems, for example, ice crystal, with structure disorder or damping and finite temperatures exposed in an externally applied electric-field have been numerically studied by Runge-Kutta way in our soliton model. The results obtained show that the proton-soliton is very robust against the structure disorder including the fluctuation of the force constant and disorder in the sequence of masses and thermal perturbation and damping of medium, the velocity of its conductivity increases with increasing of the externally applied electric-field and decreasing of the damping coefficient of medium, but the proton-soliton disperses for quite great fluctuation of the ＂force constant and damping coefficient. In the numerical simulation we find that the proton-soliton in our model is thermally stable in a large region of temperature of T ≤ 273 K under influences of damping and externally applied electric-field in ice crvstal. This shows that our model is available and appropriate to ice.