All these bulk TE materials are characterized by a low lattice thermal conductivity, partly or primarily owing to the strong lattice
anharmonicity, small phonon group velocity, or extensive phonon scattering by various lattice defects.
Park, "Double-well potential: The WKB approximation with phase loss and
anharmonicity effect," Physical Review A: Atomic, Molecular and Optical Physics, vol.
The computed frequencies were multiplied by the uniform factor of 0.97 to obtain a good estimate of the experimental results and to eliminate known systematic errors related to
anharmonicity [25].
where v is the ground state vibrational quantum number, [E.sub.0] is the excited-state zero-phonon energy, [omega] is the ground-state harmonic vibration frequency (in [cm.sup.-1]units) and [chi] is the
anharmonicity constant.
Secondly, because it was derived under the assumption of weak
anharmonicity, both the shape and the behavior of high-amplitude waves cannot be predicted well by the KdV.
NIR bands are the result of complex
anharmonicity vibrational motion of these chemical bonds [13, 14].
Although Hooke's Law gives exact analytical solution to Schrodinger's Equation in the simple model of quantum harmonic oscillator, Morse's Law is more general as it takes both the
anharmonicity and the overtone transitions into account.
The basic assumptions of the SET model are: (a) there is the possibility of coupling between vibration modes of absorbed water (v) and vibration modes of reaction environment ([omega]), (b) the activated complex for the dehydration is formed via the resonant (selective) transfer of required energy from the reaction environment to resonant vibration mode of absorbed water, (c) the value of transferred energy is quantized and it is determined by the number of resonant vibration quanta (n) which are exchanged between the reaction environment and the resonant vibration mode of absorbed water, (d) resonant transfer of energy causes the change in the value of
anharmonicity factor of the resonant vibration mode.
The author has organized his text in five parts, examining ideas and principles, the physics of the electron, the theory of
anharmonicity, quantum fields, and radiative corrections, in turn.