Relaxation mechanism, Debye-type

This result was first published by Peter Debye in 1927, and is called a Debye-type relaxation mechanism. 

Figure 6.2. Schematic representation of the signal ascribed to a single-relaxation-time (Debye-type) mechanism (Su = 2, e, = 12, and x = ls) (a) e and e" versus log(cor) (b) M, M" and tan 5 versus log(cor).

Small proteins and biopolymers of 1 pm sizes also possess the Debye-type orientation relaxation in MHz (for small molecules of several angstroms this relaxation would be in the GHz range) that can overlap with the P-relaxation. Small dipoles and molecules exhibiting rotational orientation, the relaxation mechanism can be approximated as spherical particles of radius a in solvent of viscosity i), where their charge z can often be assumed to be unity [6]. The high-frequency relaxation times corresponding to this phenomenon can be described in a simplified expression ... 

In our previous papers , we have shown that collective jump motions of atoms take place in highly supercooled fluid states, mainly contributing to the a relaxation, and therefore represents the molecular-level mechanisms. The main purpose of this paper is to study both a and / relaxations from S q,u>) and x (9,w) in a supercooled fluid by a super-long-time molecular dynamics (MD) simulation for a model fluid of binary soft-sphere mixtures. In particular, we focus on studying the type of each relaxation (Debye or non-Debye ) and the molecular-level processes for the / relaxation. 

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