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Quantum Statistical Approach to Debye-Waller Factor in EXAFS, EELS, and ARXPS: VII. Path Integral Approach to Asymmetric Double-well Potentials
Journal of the Physical Society of Japan
We apply a finite temperature path integral method to study strongly anharmonic thermal factors in extended X-ray absorption fine structure (EXAFS), electron energy-loss spectroscopy (EELS) and angle resolved X-ray photoelectron spectroscopy (ARXPS). Two examples, symmetric and asymmetric double-well potentials are considered for the anharmonic potentials, which are used to describe structural phase transition and rattling mechanism. We discuss the quantum tunneling effects in the thermaldoi:10.1143/jpsj.75.054603 fatcat:owldck2acrfpxoogc2tzu2lnkm