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We present an extension of the relativistic electron transport theory for the standard (charge) conductivity tensor of random alloys within the tight-binding linear muffin-tin orbital method to the so-called spin-dependent conductivity…

材料科学 · 物理学 2019-11-18 Ilja Turek , Josef Kudrnovsky , Vaclav Drchal

We present an efficient and accurate method for calculating electronic structure and related properties of random alloys with a proper treatment of local environment effects. The method is a generalization of the locally self-consistent…

材料科学 · 物理学 2012-05-15 Oleg E. Peil , Andrei V. Ruban , Börje Johansson

In the framework of density functional theory, the structural and magnetic properties of Fe$_{100-x}$Al$_x$ alloys (${5 \leq x \leq 25}$~at.\%) with the different structural order are investigated. Using the Korringa-Kohn-Rostoker Green's…

We here study electronic structure and magnetic properties of disordered CoPd and CoPt alloys using Augmented Space Recursion technique coupled with the tight-binding linearized muffin tin orbital (TB-LMTO) method. Effect of short range…

材料科学 · 物理学 2019-08-17 Subhradip Ghosh , Chhanda Basu Chaudhuri , Biplab Sanyal , Abhijit Mookerjee

The electric and thermo-magneto-electric transport of the prototypical ferromagnetic transition-metal alloy system fcc-Co$_x$Pd$_{1-x}$ has been investigated on the basis of Kubo's linear response formalism. The results for the full…

材料科学 · 物理学 2015-02-18 S. Wimmer , D. Ködderitzsch , H. Ebert

We present an ab initio theory of transport quantities of metallic ferromagnets developed in the framework of the fully relativistic tight-binding linear muffin-tin orbital method. The approach is based on the Kubo-Streda formula for the…

材料科学 · 物理学 2012-07-16 Ilja Turek , Josef Kudrnovsky , Vaclav Drchal

We provide a systematic analysis of finite-temperature magnetic properties of random alloys Fe$_x$Ni$_{1-x}$ with the face-centered-cubic structure over a broad concentration range $x$. By means of the spin-polarized relativistic…

材料科学 · 物理学 2021-12-06 G. V. Paradezhenko , D. Yudin , A. A. Pervishko

We present first principles charge- and spin-selfconsistent electronic structure computations on the Heusler-type disordered alloys Fe$_{3-x}$V$_{x}$X for three different metalloids X=(Si, Ga and Al). In these calculations we use the…

材料科学 · 物理学 2009-10-31 A. Bansil , S. Kaprzyk , P. E. Mijnarends , J. Toboła

We present here a formulation for the calculation of the configuration-averaged optical conductivity in random alloys. Our formulation is based on the augmented-space theorem introduced by one of us [A. Mookerjee, J. Phys. C: Solid State…

材料科学 · 物理学 2007-05-23 Kamal Krishna Saha , Abhijit Mookerjee

We present a comprehensive study on the low-temperature orthorhombic phase of Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$ based on the Korringa-Kohn-Rostoker-Green function approach. Using this bandstructure method in combination with the coherent…

超导电性 · 物理学 2014-11-19 Gerald Derondeau , Svitlana Polesya , Sergiy Mankovsky , Hubert Ebert , Ján Minár

The recursion and path-integral methods are applied to analytically study the electronic structure of a neutral $C_{60}$ molecule. We employ a tight-binding Hamiltonian which considers both the $s$ and $p$ valence electrons of carbon. From…

材料科学 · 物理学 2009-10-22 Yeong-Lieh Lin , Franco Nori

We have studied the problem of phase stability in Fe-Pt and Co-Pt alloy systems. We have used the orbital peeling technique in the conjunction of augmented space recursion based on the tight binding linear orbital method as the method for…

材料科学 · 物理学 2009-11-10 Durga Paudyal , Tanusri Saha-Dasgupta , Abhijit Mookerjee

First-principles calculations with the full-potential linearized augmented plane-wave (FP-LAPW) method have been performed to investigate detailed electronic and linear optical properties of Sr$_{2}$CuO$_{2}$Cl$_{2}$, which is a classical…

强关联电子 · 物理学 2009-11-11 Hongming Weng , Xiangang Wan , Jian Zhou , Jinming Dong

We investigate the thermodynamics and phase stability of the AlTiVCr lightweight high-entropy alloy using a combination of ab initio electronic structure calculations, a concentration wave analysis, and atomistic Monte Carlo simulations. In…

材料科学 · 物理学 2026-01-26 Christopher D. Woodgate , Hubert J. Naguszewski , Nicolas F. Piwek , David Redka

We study the electronic and magnetic properties of T$_2$AlC (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…

材料科学 · 物理学 2023-05-26 L. V. Bekenov , S. V. Moklyak , B. F. Zhuravlev , Yu. N. Kucherenko , V. N. Antonov

The electronic structure of Fe impurity in MgO was calculated by the linear muffin-tin orbital--full-potential method within the conventional local-density approximation (LDA) and making use of the LDA+$U$ formalism. The importance of…

凝聚态物理 · 物理学 2009-10-22 M. Korotin , A. Postnikov , T. Neumann , G. Borstel , V. Anisimov , M. Methfessel

The magnetic and electronic structures of $3d$ impurity atoms from Sc to Zn in ferromagnetic body-centered cubic iron are investigated using the all-electron full-potential linearized augmented plane-wave method based on the generalized…

材料科学 · 物理学 2010-05-25 Gul Rahman , In Gee Kim , H. K. D. H. Bhadeshia , Arthur J. Freeman

Fe-Co alloys with induced tetragonal strain are promising materials for rare-earth-free permanent magnets. However, as ultrathin-film studies have shown, tetragonal Fe-Co structures tend to a rapid relaxation toward a cubic structure as the…

材料科学 · 物理学 2025-02-10 Wojciech Marciniak , Mirosław Werwiński

We develop a machine-learned interatomic potential for AlCrCuFeNi high-entropy alloys (HEA) using a diverse set of structures from density functional theory calculated including magnetic effects. The potential is based on the…

In this letter, we apply the mixed-bond spin-1 Ising model to the study of the magnetic properties of Fe-Mn alloys in the $\alpha$ phase by employing the effective field theory (EFT). Here, we suggest a new approach to the ferromagnetic…

无序系统与神经网络 · 物理学 2014-11-18 A. S. Freitas , Douglas F. de Albuquerque , I. P. Fittipaldi , N. O. Moreno