A Positron Study of the Fermi Surface of TmGa3
A Positron Study of the Fermi Surface of TmGa3
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TmGa3费米面的正电子研究
DOI：
10.4028/www.scientific.net/msf.363-365.573
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Monge
中科院分区：
文献类型：
--
作者：
M. Biasini;A. Czopnik;A. Jura;G. Kontrym‐Sznajd;M. Monge
对于TmGa3单晶，测量了正电子湮没辐射光谱的二维角相关，并采用了基于Van Citter迭代法的去卷积算法。利用Cormack方法和基于修正傅里叶变换的方法重建了三维正负电子动量密度。经过3DLCW变换后，得到的k-空间密度与能带结构LMTO计算结果吻合较好。特别是，反卷积数据的使用有助于揭示第六带费米面的小细节。
For a single crystal of TmGa3, two-dimensional angular correlation of positron annihilation radiation spectra were measured and subjected to a deconvolution algorithm based on the Van Citter iterative method. The three-dimensional electron-positron momentum density was reconstructed both via the Cormack and a modified Fourier-transform-based method. After the 3D LCW transformation, the resulting k-space density was in fair agreement with band structure LMTO calculations. In particular, the use of deconvoluted data helped to reveal small details of the Fermi surface in the 6th band.