Galvanomagnetic effects in bismuth selenide Bi2Se3

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  • Galvanomagnetic Effects in Bismuth Selenide Bi<SUB>2</SUB>Se<SUB>3</SUB>

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The galvanomagnetic effects have been investigated in single crystal specimens of n-type Bi2Se3 at 90°K. The experimental results are shown to be reasonably consistent with the six-valley model of the band structure in which the energy minima are situated on the reflection planes. The constant energy surfaces associated with the valley are ellipsoidal and the ratios of the principal effective masses are m2⁄m1=0.33 and m3⁄m1=4.2. The ellipsoids are stretched in a direction nearly parallel to the three-fold axis of the crystal. The measured values of the Hall coefficient and thermo-electric power are nearly isotropic.

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