Hall-effect sign reversal in CaRuO3 and SrRuO3 thin films
Hall-effect sign reversal in CaRuO3 and SrRuO3 thin films
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DOI：
10.1103/physrevb.54.8996
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发表时间：
1996-10-01
影响因子：
3.7
通讯作者：
Eom, CB
中科院分区：
文献类型：
--
作者：
Gausepohl, SC;Lee, M;Eom, CB
对金属氧化物CaRuO3和SrRuO3外延薄膜的霍尔效应测量表明，随着温度的增加，通过类似于50 K，从负到正的符号变化。这两个符号的存在以及霍尔系数的低温和高温幅度表明这些材料是高度补偿的金属。随着温度的变化，符号的变化表明这两种材料中费米表面的大部分区域的能带曲率几乎为零。最近的能带结构计算的比较。
Hall-effect measurements on epitaxial thin films of the metallic oxides CaRuO3 and SrRuO3 show a sign change from negative to positive-as temperature is increased through similar to 50 K. The presence of both signs together with the low- and high-temperature magnitudes of the Hall coefficients indicate that these materials are highly compensated metals. The sign change with temperature suggests that large regions of the Fermi surfaces in both materials have nearly zero band curvature. Comparisons to recent band-structure calculations are made.