Summary
Modulated-reflectivity measurements on Bi2Te3 at room temperature with a double-beam wavelength modulation method are reported. The data were subjected to a Kramers-Kronig analysis in order to determine the corresponding changes △ε1 and △ε2. New structures are found and their nature in terms of critical points of joint density of states has been also analysed.
Riassunto
Si riportano i risultati di misure di riflettività modulata del tellururo di bismuto, a temperatura ambiente, usando il metodo della modulazione della lunghezza d'onda con un sistema a doppio fascio. Le corrispondenti variazioni △ε1 e △ε2 sono state determinate con la trasformazione di Kramers-Kronig ed analizzate in termini di punti critici della densità congiunta degli stati.
Резюме
Приводятся результаты измерений модулированной отражательной способности Bi2Te3 при комнатной температуре, используя метод двухлучевой модуляции по длине волны. Полученные данные подвергаются анализу Крамерса-Кронига для определения соответствующих изменений △ε1 у △ε2. Обнаружены новые структуры. Проведен анализ природы этих структур, исхоодя из критических точек для общей плотности состояний.
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Grasso, V., Mondio, G. & Saitta, G. Wavelength-modulated reflectivity of bismuth telluride. Nuov Cim B 26, 233–242 (1975). https://doi.org/10.1007/BF02755551
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DOI: https://doi.org/10.1007/BF02755551