de Haas-van Alphen Effect in LaB2C2.
de Haas-van Alphen Effect in LaB2C2.
复制标题
LaB2C2 中的德哈斯-范阿尔芬效应。
DOI：
10.1143/jpsj.71.693
复制
发表时间：
2002
影响因子：
1.7
通讯作者：
Kazuya Z. Suzuki
中科院分区：
文献类型：
--
作者：
R. Watanuki;T. Terashima;Kazuya Z. Suzuki
通过测量De Haas-van Alphen(DHvA)振荡，研究了LaB 2 C2的费米面.DHvA频率的角依赖关系表明存在多个三维闭合的费米面，即La中的5d轨道与B-C薄片中的2p轨道强烈杂化。DHvA频率的角度依赖关系与能带计算的结果吻合得很好。频率最高的分支大于第一布里渊区的横截面，对应于磁击穿产生的大轨道。
Fermi surfaces of LaB 2 C 2 were investigated by the measurement of the de Haas–van Alphen (dHvA) oscillations. The angular dependence of the dHvA frequency indicates the presence of the multiple three-dimensional closed Fermi surfaces, that is, the 5d orbitals in lanthanum strongly hybridize with the 2p orbitals in boron-carbon sheets. The angular dependence of the dHvA frequency coincides very well with that predicted by the band calculations. The branch having the highest frequency larger than cross-section of the 1st Brillouin zone corresponds to the large orbit originating from magnetic breakdown.