References
- Hidaka , T. and Oka , K. 1987 . Phys. Rev. , B-35 : 8502
- Hidaka , T. and Oka , K. 1990 . Phys. Rev. , B-42 : 8295
- Samara , G. A. , Sakudo , T. and Yoshimitsu , K. 1975 . Phys. Rev. Letters , 35 : 1767
- Geshi , K. 1976 . J. Phys. Soc. Jpn , 41 : 1437
- Wemple , S. H. 1970 . Phys. Rev. , B-2 : 2679
- Kristoffel , N. and Konsin , P. 1973 . Ferroelectrics , 6 : 3 The treatment in this paper does not include the second quantization of the phonon so is insufficient for discussion of the nonhydrogen isotope effect.
- Hirotsu , S. , Yanagi , T. and Sawada , S. 1968 . J. Phys. Soc. Jpn , 25 : 799 For NaNO2, within the author's knowledge, the data of the band gap shift with the transition has not been reported. However, the refractive index of it does not change within experimental error, so we can presume that the band gap in NaNO2 does not change with the transition. See
- Cochran , W. 1960 . Adv. in Phys. , 9 : 387
- 1961 . 10 : 401
- Bardeen , J. and Pines , D. 1955 . Phys. Rev. , 99 : 1140
- Mitra , S. S. 1969 . Phys. Rev. , 186 : 942
- Kahn , A. H. and Leyendecker , A. J. 1964 . Phys. Rev. , 135 : A1321
- Hidaka , T. 1979 . Phys. Rev. , B-20 : 2769
- Hidaka , T. 1978 . Phys. Rev. , B-17 : 4363
- Migdal , A. B. 1958 . Soviet Phys. JETP , 7 : 996 (English Trans.)