Theory of the Acoustic de Haas-van Alphen Effect
Theory of the Acoustic de Haas-van Alphen Effect
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声学德哈斯-范阿尔芬效应理论
DOI：
10.1143/jpsj.62.4352
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发表时间：
1993
影响因子：
1.7
通讯作者：
T. Goto
中科院分区：
文献类型：
--
作者：
M. Kataoka;T. Goto
从理论上研究了磁致伸缩和弹性常数的德哈斯-范阿尔芬 (dHvA) 振荡。采用有效质量近似处理具有斜方对称性的电子能带。对于 ω s τ<1，声波角频率 ω s 和电子寿命 τ，朗道轨道在变形金属中形成，而不影响局部离子运动。在离子运动的静态近似中，电子晶格系统的自由能被计算为应变的函数。这种自由能揭示了声学 dHvA 振荡，并证明它们的振幅强烈依赖于所施加磁场的方向和应变模式。需要强调的是，目前的声学 dHvA 效应可以很好地探讨金属的电子特性，例如费米面和电子晶格耦合。
The de Haas-van Alphen (dHvA) oscillations of the magnetostrictions and the elastic constants are investigated theoretically. The electron band with orthorhombic symmetry is treated in the effective mass approximation. For ω s τ≪1 with the sound-wave angular frequency ω s and the electron life time τ, Landau orbitals are formed in a deformed metal without affecting local ion motions. In this static approximation to the ion motion, the free energy of the electron-lattice system is calculated as a function of strains. This free energy reveals the acoustic dHvA oscillations and proves that their amplitudes strongly depend on both the direction of an applied magnetic field and the strain mode. It is emphasized that the present acoustic dHvA effect can be a good probe into the electronic properties of metals such as the Fermi surface and the electron-lattice coupling.