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Observation of optical Shubnikov de Haas effect in photoconductivity |
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| Authors: | H. Pascher R. Grisar G. Bauer H. Burkhard |
| Affiliation: | Physikalisches Institut der Universität Würzburg, D-8700 Würzburg, Germany;Frauenhofer Institut für Physik.Meβtechnik, D-7800 Freiburg, Germany;Institut für Physik, Montanuniversität Leoben, A-8700 Leoben, Austria;Forschungsinstitut der Deutschen Bundespost, FTZ, D-6100 Darmstadt, Germany |
| Abstract: | We have observed a new type of oscillatory magnetophotoconductivity effect. It occurs in highly degenerate materials at high power levels of incident radiation. The effect is an analog of the d.c. Shubnikov de Haas effect and caused by an electron temperature modulation due to free carrier absorption in high magnetic fields. The degree of modulation of the photoconductive signal can even exceed 50% and thus is conveniently observable in III–V and IV–VI compounds. |
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