Moment Formation in TmSe1−xTex: From IV Semiconductors to IV Metals
The TmSe-TmTe system is unique among the rare earth monochalcogenides as it shows a compositionally induced semiconductor to metal transition (SMT). TmTe on the one end of the system is an ionic semiconductor with an energy gap of about 0.3 eV and the Tm ions are in a divalent state. TmSe on the other end is an intermediate valent metal with a Tm valence of about 2.8. For x > 0.4 the compounds are semiconducting and for x < 0.2 metallic. Both phases are syparated by a miscibility gap in the composition range 0.2 < x < 0.4.
KeywordsBulk Modulus Moment Formation Inverse Magnetic Susceptibility High Energy Experiment Ionic Semiconductor
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