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A mean-field Fokker-Planck equation approach to the dynamics of ferrofluids in the presence of a magnetic field and velocity gradients is proposed that incorporates magnetic dipole-dipole interactions of the colloidal particles. The model…

软凝聚态物质 · 物理学 2015-06-24 Patrick Ilg , Siegfried Hess

The proximity-induced couplings in graphene due to the vicinity of a ferromagnetic insulator are analyzed. We combine general symmetry principles and simple tight-binding descriptions to consider different orientations of the magnetization.…

介观与纳米尺度物理 · 物理学 2019-10-15 Vo Tien Phong , Niels R. Walet , Francisco Guinea

Knowing the transport properties of iron under realistic conditions present in the Earth's core is essential for the geophysical modeling of Earth's magnetic field generation. Besides by extreme pressures and temperatures, transport may be…

We report high-resolution dilatometry on high-quality single crystals of NiTiO3 grown by means of the optical floating-zone technique. The anisotropic magnetic phase diagram is constructed from thermal expansion and magnetostriction studies…

The role of entanglement in determining the non-classicality of a given interaction has gained significant traction over the last few years. In particular, as the basis for new experimental proposals to test the quantum nature of the…

量子物理 · 物理学 2023-11-15 A. Douglas K. Plato , Dennis Rätzel , Chuanqi Wan

The electronic contribution to the magnetically induced polarization in orthorhombic TbMnO3 is studied from first principles. We compare the cases in which the spin cycloid, which induces the electric polarization via the spin-orbit…

材料科学 · 物理学 2009-12-16 Andrei Malashevich , David Vanderbilt

Using a combination of density functional theory (DFT) and spin-wave theory methods, we investigate the magnetic interactions and spin excitations in semiconducting VI$_3$. Exchange parameters of monolayer, bilayer, and bulk forms are…

材料科学 · 物理学 2021-09-24 Elijah Gordon , V. V. Mkhitaryan , Haijun Zhao , Y. Lee , Liqin Ke

The coupling between ferroelectric and magnetic orders in multiferroic materials and the nature of magnetoelectric (ME) effects are enduring experimental challenges. In this work, we have studied the response of magnetization to…

Strong electronic correlations generally require non-perturbative treatment. Local correlations are captured by dynamical mean-field theory while nonlocal correlations can be treated with diagrammatic extensions such as the Dual Fermion…

强关联电子 · 物理学 2026-05-05 Akshat Mishra , Hugo U. R. Strand , Erik G. C. P. van Loon

The Electron Localization Function (ELF) -- as proposed originally by Becke and Edgecombe -- has been widely adopted as a descriptor of atomic shells and covalent bonds. The ELF takes into account the antisymmetry of Fermions but it…

材料科学 · 物理学 2015-09-15 Stefano Pittalis , Alain Delgado , Carlo Andrea Rozzi

We present and validate a novel semi-analytical approach to study the effect of dynamical friction on the orbits of massive perturbers in rotating stellar discs. We find that dynamical friction efficiently circularises the orbit of…

星系天体物理 · 物理学 2020-04-22 Matteo Bonetti , Elisa Bortolas , Alessandro Lupi , Massimo Dotti , Sandra I. Raimundo

The effect of electron correlation on the angle dependence of magnetoconductivity is studied in quasi-one-dimensional organic conductors. We investigated the effect on the basis of the momentum dependence of both quasi-particle's lifetime…

强关联电子 · 物理学 2007-05-23 Hirono Kaneyasu , Keita Kishigi , Yasumasa Hasegawa

This study presents a theoretical investigation of the thermoelectric properties of three-dimensional magnetic topological insulators (TIs), with a focus on the role of exchange interactions between magnetic dopants. The presence of these…

介观与纳米尺度物理 · 物理学 2025-10-03 M. Tirgar , H. Barati Abgarmi , J. Abouie

In this work, magnetization dynamics is studied in superconductor/ferromagnet/superconductor three-layered films in a wide frequency, field, and temperature ranges using the broad-band ferromagnetic resonance measurement technique. It is…

Correlation between orbital structure and magnetic ordering in bilayered manganites is examined. A level separation between the $3d_{3z^2-r^2}$ and $3d_{x^2-y^2}$ orbitals in a Mn ion is calculated in the ionic model for a large number of…

强关联电子 · 物理学 2009-10-31 S. Okamoto , S. Ishihara , S. Maekawa

We calculate magnetic anisotropy energy of Fe and Ni by taking into account the effects of strong electronic correlations, spin-orbit coupling, and non-collinearity of intra--atomic magnetization. The LDA+U method is used and its…

强关联电子 · 物理学 2007-05-23 Imseok Yang , Sergej Y. Savrasov , Gabriel Kotliar

Magnetic anisotropy in atomically thin correlated heterostructures is essential for exploring quantum magnetic phases for next-generation spintronics. Whereas previous studies have mostly focused on van der Waals systems, here, we…

We calculate the properties of the 4$d$ ferromagnet SrRuO$_3$ in bulk and thin film form with the aim of understanding the experimentally observed metal to insulator transition at reduced thickness. Although the spatial extent of the 4$d$…

材料科学 · 物理学 2008-10-08 James M. Rondinelli , Nuala M. Caffrey , Stefano Sanvito , Nicola A. Spaldin

Electron correlation effects are essential for an accurate ab initio description of molecules. A quantitative a priori knowledge of the single- or multi-reference nature of electronic structures as well as of the dominant contributions to…

量子物理 · 物理学 2012-12-18 Katharina Boguslawski , Paweł Tecmer , Örs Legeza , Markus Reiher

Electron dynamics surrounding the X-line in magnetopause-type asymmetric reconnection is investigated using a two-dimensional particle-in-cell simulation. We study electron properties of three characteristic regions in the vicinity of the…

等离子体物理 · 物理学 2017-07-12 Seiji Zenitani , Hiroshi Hasegawa , Tsugunobu Nagai
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