Anisotropy in the momentum density of tantalum

被引：77

作者：

Ahuja, BL ^{[1
]}

Sharma, M ^{[1
]}

Mathur, S ^{[1
]}

机构：

[1] ML Sukhadia Univ, Univ Coll Sci, Dept Phys, Udaipur 313001, Rajasthan, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2006年 / 244卷 / 02期

关键词：

Compton scattering; electron-electron correlation; Fermi surfaces topology; electron momentum density; band structure calculations;

D O I：

10.1016/j.nimb.2005.10.011

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The [100], [110] and [111] directional Compton profiles of tantalum have been measured, at an intermediate resolution, with 661.65 keV gamma-radiation and a well-defined scattering vector. We have also computed the Compton profiles within the framework of pseudopotential using CRYSTAL03 code of Torino group. The measured anisotropy is found to be smaller to that predicted by our pseudopotential computations and also the available augmented plane wave (APW) calculations. A comparison of the absolute theoretical and the experimental profiles shows clearly for the first time the importance of anisotropic electron-electron correction effect in the third series transition metals. A quantitative comparison between the experimental and theoretical directional difference profiles reveals some accurate information about the Fermi surface topology of tantalum. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：419 / 426

页数：8

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