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arXiv 0710.4628cond-mat.supr-concond-mat.stat-mech
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ZrB12费米面的de Haas-van Alphen效应研究

The de Haas - van Alphen Effect Study of the Fermi Surface of ZrB12

V. A. Gasparov, I. Sheikin, F. Levy, J. Teyssier, G. Santi

摘要:

在磁场高达28 T、温度低至0.35 K的条件下,通过磁矩测量研究了团簇超导体ZrB_(12)中的de Haas - van Alphen(dHvA)效应.探测到了费米面颈截面和“立方盒”轨道引起的dHvA振荡。我们测量了FS颈部的回旋有效质量为0.5m_0。dHvA频率以及回旋加速器有效质量是使用广义梯度近似中的全势线性Muffin-Tin轨道(LMTO)方法计算的。的dHvA频率与带结构计算的角度依赖性的比较意味着与理论模型的总体协议,而一个部分不能明确确定。

英文摘要:

The de Haas - van Alphen (dHvA) effect in the cluster superconductor ZrB12 was studied by magnetic torque measurements in magnetic fields up to 28 T at temperatures down to 0.35 K. The dHvA oscillations due to orbits from the Neck sections and "Cubic Box" of the Fermi surface were detected. We measured cyclotron effective masses of 0.5m_0 for Neck section of the FS. The dHvA frequencies as well as the cyclotron effective masses were calculated using the full potential Linear Muffin-Tin Orbital (LMTO) method within the Generalized Gradient Approximation. Comparison of the angular dependence of the dHvA frequencies with the band-structure calculations implies overall agreement with theoretical model, while one section could not be definitely identified.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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