Search results

Sort By:

Limit search:

Temperature Study of the Polarized Reflectivity of TEA(TCNQ)_{2} Single Crystal

100%

Olejniczak I., Graja A.

Acta Physica Polonica A

1993

vol. 83

issue 4

517-526

The infrared reflection spectra of the organic quasi-one-dimensional semiconductor triethylammonium (TCNQ)_{2} between 80 and 300 K are reported. Characteristic changes in the temperature dependencies of the bands assigned to the donor vibrations are observed. An interpretation of the electron-molecular vibration coupling in terms of the dimer theory is discussed. It is concluded that the thermal evolution of the spectrum corroborates the semiconductor-semiconductor type of phase transition attributed to the cation disorder.

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)_{2}

100%

Olejniczak I., Graja A.

Acta Physica Polonica A

1994

vol. 85

issue 3

497-507

An interpretation of the IR polarized spectra of the organic quasi-one--dimensional semiconductor triethylammonium (TCNQ)_{2}, between 80 and 300 K, is discussed in terms of the dimer and tetramer theories. It is concluded that the dimer model is acceptable only for describing high-T phase of TEA(TCNQ)_{2}. The tetramer model is more adequate for an interpretation of the IR spectra of the salt within the large temperature range. It is also shown that the phase transition influences distinctly neither vibronic (electron-molecular vibration coupled) modes nor conformity of the experimental spectra with calculated ones according to the dimer or tetramer theory.

Refine search results

2 Acta Physica Polonica A

1 1994

1 1993

2 Graja A.

2 Olejniczak I.

Search results

Temperature Study of the Polarized Reflectivity of TEA(TCNQ)_{2} Single Crystal

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)_{2}