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Optical conductivity of α‐Mn

机译:α-Mn的光导率

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The optical constants were measured at room temperature in the photon‐energy range 0.6–6.5 eV on evaporated thin films. Evaporation conditions were chosen that gave the α‐Mn crystal structure with relatively large grains. The optical conductivity was separated into intraband and interband contributions by fitting to the Drude formula at low energies. The results are anomalous in comparison to other 3d transition metals: the free‐electron lifetime is exceptionally short (in agreement with the large dc resistivity of Mn), and the interband transitions seem unusually weak at the lower energies. We discuss possible explanations related to the complicated crystal structure of α‐Mn with its loss of point symmetry at the atom sites.
机译:在室温下,在蒸发的薄膜上以0.6-6.5 eV的光子能量范围测量光学常数。选择蒸发条件,使α-Mn晶体结构具有较大的晶粒。通过在低能量下拟合Drude公式,将光导率分为带内和带间贡献。与其他3d过渡金属相比,结果是异常的:自由电子寿命非常短(与Mn的大直流电阻率一致),并且在较低能量下带间跃迁似乎异常弱。我们讨论了与复杂的α-Mn晶体结构有关的可能解释,该结构由于其在原子位点的点对称性丧失。

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    《Journal of Applied Physics》 |1982年第12期|P.8999-9001|共3页
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  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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