Electronic structure and X-ray magnetic circular dichroism in the MAX phases T2AlC (T = Ti and Cr) from first principles

IF 0.9 4区 物理与天体物理 Q4 PHYSICS, CONDENSED MATTER Condensed Matter Physics Pub Date : 2023-05-25 DOI:10.5488/CMP.26.23706
L. Bekenov, S. V. Moklyak, B. F. Zhuravlev, Y. Kucherenko, V. Antonov
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Abstract

We study the electronic and magnetic properties of T2AlC (T = Ti and Cr) compounds in the density-functional theory using the generalized gradient approximation (GGA) with consideration of strong Coulomb correlations (GGA+U) in the framework of the fully relativistic spin-polarized Dirac linear muffin-tin orbital (LMTO) band-structure method. The X-ray absorption spectra and X-ray magnetic circular dichroism (XMCD) at the Cr L2,3 and Cr, Ti, and C K edges were investigated theoretically. The calculated results are in good agreement with experimental data. The effect of the electric quadrupole E2 and magnetic dipole M1 transitions at the Cr K edge has been investigated.
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从第一性原理研究T2AlC (T = Ti和Cr) MAX相的电子结构和x射线磁圆二色性
在考虑强库仑关联(GGA+U)的密度泛函理论框架下,在完全相对论自旋极化狄拉克线性松松锡轨道(LMTO)带结构方法的框架下,利用广义梯度近似(GGA)研究了T2AlC (T = Ti和Cr)化合物的电子和磁性能。从理论上研究了Cr L2,3和Cr, Ti, ck边缘的x射线吸收光谱和x射线磁圆二色性。计算结果与实验数据吻合较好。研究了电四极子E2和磁偶极子M1在Cr - K边缘的跃迁效应。
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来源期刊
Condensed Matter Physics
Condensed Matter Physics 物理-物理:凝聚态物理
CiteScore
1.10
自引率
16.70%
发文量
17
审稿时长
1 months
期刊介绍: Condensed Matter Physics contains original and review articles in the field of statistical mechanics and thermodynamics of equilibrium and nonequilibrium processes, relativistic mechanics of interacting particle systems.The main attention is paid to physics of solid, liquid and amorphous systems, phase equilibria and phase transitions, thermal, structural, electric, magnetic and optical properties of condensed matter. Condensed Matter Physics is published quarterly.
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