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We have performed the first ab-initio calculations of a possible complex non-collinear magnetic structure in aluminium-rich Al-Mn liquids within the real-space tight-binding LMTO method. In our previous work we predicted the existence of…

凝聚态物理 · 物理学 2009-10-28 A. V. Smirnov , A. M. Bratkovsky

Iridates are characterized by a fascinating interplay of spin-orbit and electron-electron interactions. The honeycomb-lattice materials A2IrO3 (A=Na,Li) have been proposed to realize pseudospin-1/2 Mott insulating states with strongly…

强关联电子 · 物理学 2014-11-11 Eric C. Andrade , Matthias Vojta

Ising model with quenched random magnetic fields is examined for single Gaussian, bimodal and double Gaussian random field distributions by introducing an effective field approximation that takes into account the correlations between…

统计力学 · 物理学 2016-08-14 Yusuf Yüksel , Ümit Akıncı , Hamza Polat

We study the behavior of the magnetization and the magnetic susceptibility of molecular magnets with complex bridging structure. Our computations are based on a post-Hartree-Fock method accounting for the intricate network of interatomic…

强关联电子 · 物理学 2020-03-30 M. Georgiev , H. Chamati

We consider the motion of electrons confined to a two dimensional plane with an externally applied perpendicular inhomogeneous magnetic field, both with and without a Coulomb potential. We find that as long as the magnetic field is…

介观与纳米尺度物理 · 物理学 2016-08-05 C. A. Downing , M. E. Portnoi

Using first-principles density functional theory method, we have investigated the distribution and magnetism of doped Mn atoms in the vicinity of the 3 (112) grain boundary in Ge. We find that at low concentration, the substitutional sites…

材料科学 · 物理学 2010-05-24 W. Wang , S. L. Zhang , Z. X. Tian , W. Xiao

Electronic structures of MC where M is the alkali and alkaline earth metals with the rocksalt structure are calculated by full potential density functional codes. We find that the spin magnetic moment in the compounds is mainly contributed…

材料科学 · 物理学 2012-11-02 Wenxu Zhang , Zhida Song , Bin Peng , Wanli Zhang

The magnetic moments of ground state single, double and triple heavy baryons containing charm or bottom quarks are calculated in a relativistic three-quark model, which, in the heavy quark limit, is consistent with Heavy Quark Effective…

高能物理 - 唯象学 · 物理学 2008-11-26 Amand Faessler , Th. Gutsche , M. A. Ivanov , J. G. Korner , V. E. Lyubovitskij , D. Nicmorus , K. Pumsa-ard

Through the analysis of density of states (DOS), we study two different kinds of cyclic molecules, a sodium atomic circle and a Polycyclic Aromatic Hydrocarbons (PAH) molecule respectively under an external magnetic field. The results of…

计算物理 · 物理学 2007-11-13 Jingzhe Chen , Jin Zhang , Rushan Han

A correlation between the crystal structure and magnetic properties of system (1-x)BiFeO$_3$-(x)BaTiO$_3$ with compounds across the morphotropic phase boundary was studied using X-ray and neutron diffraction, magnetometry, and Mossbauer…

The formation of the magnetic moment in C- and N-doped MgO is the result of a delicate interplay between Hund's coupling, hybridization and Jahn-Teller distortion. The balance depends on a number of environmental variables including…

材料科学 · 物理学 2015-05-13 Andrea Droghetti , Stefano Sanvito

We calculate the magnetization of quantum dots deviating from circular symmetry for noninteracting electrons or electrons interacting according to the Hartree approximation. For few electrons the magnetization is found to depend on their…

介观与纳米尺度物理 · 物理学 2007-05-23 Ingibjorg Magnusdottir , Vidar Gudmundsson

Effect of Co, Ru and Cu substitution at B and B' sites on the magnetic and transport properties of LaSrCoRuO$_6$ have been investigated. All the doped compositions crystallize in the monoclinic structure in the space group $P2_1/n$…

强关联电子 · 物理学 2010-11-12 P. S. Ramu Murthy , K. R. Priolkar , P. A. Bhobe , A. Das , P. R. Sarode , A. K. Nigam

The ground state of the bipartite $t$-$J$ model must satisfy a specific sign structure, based on which the single-hole and two-hole ground state $Ans\ddot{a}tze$ on honeycomb lattice are constructed and studied by a variational Monte Carlo…

强关联电子 · 物理学 2024-06-25 Can Cui , Jing-Yu Zhao , Zheng-Yu Weng

The magnetic relaxation characteristics are investigated in the two-dimensional ($l^{}_x\times l^{}_y$) assembly of nanoparticles as a function of out-of-plane positional disorder strength $\Delta(\%)$ using numerical simulations. Such…

材料科学 · 物理学 2021-09-28 Manish Anand

High energy density magnets are preferred over induction magnets for many applications, including electric motors used in flying rovers, electric vehicles, and wind turbines. However, several issues related to cost and supply with…

材料科学 · 物理学 2021-06-18 Tula R Paudel , Bhubnesh Lama , Parashu Kharel

Magnetized plasmas are well known to exhibit a rich spectrum of collective modes. Here, we focus on the density modes in dense or cold plasmas, where strong coupling effects alter the mode spectrum known from traditional weakly coupled…

等离子体物理 · 物理学 2023-01-10 Hanno Kählert , Michael Bonitz

Topological magnon insulators constitute a growing field of research for their potential use as information carriers without heat dissipation. We report an experimental and theoretical study of the magnetic ground-state and excitations in…

强关联电子 · 物理学 2022-07-19 C. Wessler , B. Roessli , K. W. Krämer , U. Stuhr , A. Wildes , H. B. Braun , M. Kenzelmann

Both the in-plane and out-of-plane magnetoresistivities have been measured in the normal state of an optimally doped Bi2Sr2Ca0.8Y0.2Cu2O8+d single crystal with a magnetic field applied parallel and perpendicular to the CuO2 planes. Whatever…

超导电性 · 物理学 2009-10-31 D. Thopart , A. Wahl , A. Maignan , Ch. Simon

Here we discuss Quantum Monte Carlo results for the magnetic susceptibility, single-particle spectral weight and the irreducible particle-particle interaction vertex of the two-dimensional Hubbard model. In the doped system, as the…

凝聚态物理 · 物理学 2007-05-23 D. J. Scalapino