BAND-EDGE PROPERTIES OF A SEMICONDUCTOR ALLOY - AN NMR-STUDY OF HG1-XCDXTE

Article

关键词: NUCLEAR-MAGNETIC-RESONANCE;    KNIGHT-SHIFT;    STATES;    GAP;    TEMPERATURE;    ALXGA1-XAS;    RELAXATION;    DENSITY;    TE-125;    PBTE;   

DOI  :  10.1103/PhysRevB.48.8742

来源: SCIE

【 摘 要 】

We report Hg-199 NMR measurements of narrow-gap Hg1-xCdxTe alloys in the range x=0.20-0.28. By studying temperature dependences, we have identified intrinsic Knight shifts in these alloys. This provides a measure of Hg orbital contributions to conduction-electron states, and we find a consistently strong average contribution from Hg s orbitals. Furthermore, we identify local variations in the Knight shift with spatial variations in conduction-electron densities and symmetries. These characteristics have been related to randomly populated sites within the alloys. We also discuss Hg-199 chemical shifts and their relation to local orbital charges.

【 授权许可】

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