Group-Theoretical Interpretation of Faintness Index for Ferroelectricity or Ferroelasticity. : I. Faintness Index of Soft Vibrational Modes
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What has been called the faintness index of a degenerate set of soft vibrational modes with respect to a component y of electric polarization vector of mechanical strain tensor is group-theoretically interpreted as the smallest of the permissible values of such integer N that the symmetrized Kronecker Nth power of the irreducible representation of G for the soft modes may contain as an irreducible component the representation of G for y, where G is the space group of the prototypic phase. In there is no such N, the faintness index is defined as as aqual to infinty. A few examples are presented and discussed.
- 社団法人日本物理学会の論文
- 1973-12-05
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