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We present electronic band structure of Ag$_5$Pb$_2$O$_6$ with layered hexagonal structure containing one-dimensional chains and two-dimensional Kagom\'{e} layers of silver. A half-filled conduction band shows extremely simple, single…

强关联电子 · 物理学 2009-11-11 Tamio Oguchi

We propose a self-consistent method for electronic structure calculations of correlated systems, which combines the local spin-density approximation (LSDA) and the dynamical mean field theory (DMFT). The LSDA part is based on the exact…

强关联电子 · 物理学 2007-05-23 L. Chioncel , L. Vitos , I. A. Abrikosov , J. Kollar , M. I. Katsnelson , A. I. Lichtenstein

We present band structure calculations and quantum oscillation measurements on LuRh2Si2, which is an ideal reference to the intensively studied quantum critical heavy-fermion system YbRh2Si2. Our band structure calculations show a strong…

We investigated the reliability and applicability of so-called magnetic force linear response method to calculate spin-spin interaction strengths from first-principles. We examined the dependence on the numerical parameters including the…

强关联电子 · 物理学 2018-03-28 Hongkee Yoon , Taek Jung Kim , Jae-Hoon Sim , Seung Woo Jang , Taisuke Ozaki , Myung Joon Han

Following over a decade of intense efforts to enable major progress in spintronics devices and quantum information technology by means of materials in which the electronic structure exhibits non-trivial topological properties, three key…

GW approximation is one of the most popular parameter-free many-body methods that goes beyond the limitations of the standard density functional theory (DFT) to determine the excitation spectra for moderately correlated materials and in…

材料科学 · 物理学 2023-12-12 Kristjan Haule , Subhasish Mandal

The structural and electronic properties of cubic GaN are studied within the local density approximation by the full-potential linear muffin-tin orbitals method. The Ga $3d$ electrons are treated as band states, and no shape approximation…

凝聚态物理 · 物理学 2009-10-22 Vincenzo Fiorentini , Michael Methfessel , Matthias Scheffler

First principles linear combinations of Gaussian type orbitals-fitting function (LCGTO-FF) electronic structure calculations are used to study thickness dependencies in the surface energies and work functions of ultra-thin (111) films of…

强关联电子 · 物理学 2009-11-10 A. K. Ray , J. C. Boettger

We extend the effective fragment molecular orbital method (EFMO) into treating fragments connected by covalent bonds. The accuracy of EFMO is compared to FMO and conventional ab initio electronic structure methods for polypeptides including…

化学物理 · 物理学 2012-07-25 Casper Steinmann , Dmitri G. Fedorov , Jan H. Jensen

Using the local spin-density approximation (LSDA) and the (non self-consistent) GW approach, the (quasi-particle) band structure is calculated for MnTe in zinc-blende geometry. Different parameters characterizing the electronic structure…

强关联电子 · 物理学 2015-05-13 A. Fleszar , M. Potthoff , W. Hanke

We propose a five-band tight-binding model for the Fe-As layers of iron pnictides with the hopping amplitudes calculated within the Slater-Koster framework. The band structure found in DFT, including the orbital content of the bands, is…

超导电性 · 物理学 2009-10-08 M. J. Calderon , B. Valenzuela , E. Bascones

We perform a first principles band calculation for a group of quasi-two-dimensional organic conductors \beta-(BDA-TTP)2MF6 (M=P, As, Sb, Ta). The ab-initio calculation shows that the density of states (DOS) is correlated with the band width…

超导电性 · 物理学 2015-06-05 Hirohito Aizawa , Kazuhiko Kuroki , Syuma Yasuzuka , Jun-ichi Yamada

We analyze the electronic structure of group II-VI semiconductors obtained within LMTO approach in order to arrive at a realistic and minimal tight binding model, parameterized to provide an accurate description of both valence and…

材料科学 · 物理学 2009-11-10 Sameer Sapra , N. Shanthi , D. D. Sarma

We study a set of many-body wave-functions of Fermions that are naturally written using momentum space basis and allow for quantum superposition of Fermion occupancy, $\{n_{\bf k}\}$. This {enables} us to capture the fluctuations of the…

强关联电子 · 物理学 2024-08-05 Ankush Chaubey , Harsh Nigam , Subhro Bhattacharjee , K. Sengupta

Localized basis sets in the projector augmented wave formalism allow for computationally efficient calculations within density functional theory (DFT). However, achieving high numerical accuracy requires an extensive basis set, which also…

材料科学 · 物理学 2020-11-18 G. Gandus , A. Valli , D. Passerone , R. Stadler

Electron-positron momentum densities in Y, reconstructed from two-dimensional angular correlation of annihilation radiation spectra, are compared with the theoretical predictions of fully-relativistic augmented plane-wave calculations.…

材料科学 · 物理学 2007-05-23 G. Kontrym-Sznajd , H. Sormann , R. N. West

Electronic structures of a superconductor without inversion symmetry, LaPdSi3, and its non-superconducting counterpart, LaPdGe3, have been calculated employing the full-potential local-orbital method within the density functional theory.…

超导电性 · 物理学 2014-09-22 M. J. Winiarski , M. Samsel-Czekała

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of the undoped and electron-doped iron pnictides BaFe2\_{-x}CoxAs2 (Ba122) (x=0, 0.14) and studied the Fermi surfaces (FSs) and band dispersions near the Fermi…

First principles density functional calculations of the electronic and magnetic properties of spinel-structure LiV$_{2}$O$_{4}$ have been performed using the full potential linearized augmented planewave method. The calculations show that…

强关联电子 · 物理学 2009-10-31 D. J. Singh , P. Blaha , K. Schwarz , I. I. Mazin

In order to increase the accuracy of the linearized augmented plane wave method (LAPW) we present a new approach where the plane wave basis function is augmented by two different atomic radial components constructed at two different…

材料科学 · 物理学 2015-12-10 A. V. Nikolaev , D. Lamoen , B. Partoens