Optical absorption of EuTe in high magnetic fields |
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Authors: | LE Schmutz G Dresselhaus MS Dresselhaus |
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Institution: | Massachusetts Institute of Technology, Cambridge, MA 02139, USA |
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Abstract: | For the first time, the optical absorption edge of the magnetic semiconductor europium telluride has been studied at low temperature (1.7 K) as a function of magnetic field in the high field range 0 ≤ H ≤ 9.5 Tesla, and related to the magnetic phase diagram of this material. The exponential absorption edge has been parameterized using a magnetic field dependent extension of Urbach's rule, and the observations are found to be consistent with a simple dependence of the gap parameter on polarization and magnetic field. |
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