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Quantum systems with effective and time-dependent masses: form-preserving transformations and reality conditions

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Schulze-Halberg A.
Open Physics
|
2005
|
vol. 3
|
issue 4
591-609
EN
We study the time-dependent Schrödinger equation (TDSE) with an effective (position-dependent) mass, relevant in the context of transport phenomena in semiconductors. The most general form-preserving transformation between two TDSEs with different effective masses is derived. A condition guaranteeing the reality of the potential in the transformed TDSE is obtained. To ensure maximal generality, the mass in the TDSE is allowed to depend on time also.
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The effect of electron irradiation on the optical properties of the natural armenian zeolite-clinoptilolite

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Yeritsyan H., Harutiunian V., Gevorkyan V., Grigoryan N., Hakhverdyan E., Nikoghosyan S., Sahakyan A., Gevorgyan R., Sargisyan H., Keheyan Y.
Open Physics
|
2005
|
vol. 3
|
issue 4
623-635
EN
Infrared (IR) absorption and luminescence in chemically and radiation-modified natural Armenian Zeolite (clinoptilolite) samples have been studied. The luminescence was studied in 390–450 nm and 620–710 nm wavelength bands, and the IR measurements were carried out in the 400–5400 cm−1 range. It is shown that the luminescence intensity depends on the content of pure clinoptilolite in the samples and, probably on the distribution of “passive” luminescence centers over Si and Al sites that became “active” under radiation or chemical treatment. The samples of electron irradiated clinoptilolite have higher luminescence intensity than the chemically and thermally treated ones. A decrease in the intensity of IR absorption bands at 3550 cm−1 and 3650 cm−1 was found after irradiation.
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