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Recent works have predicted materials featuring bands with a large spin-splitting distinct from ferromagnetic and relativistically spin-orbit coupled systems. Materials displaying this property are known as altermagnets and feature a…

超导电性 · 物理学 2023-08-15 Chi Sun , Arne Brataas , Jacob Linder

A parametric study of the magnetic dipole behavior in resistive incompressible MHD inside a rotating sphere is performed, using direct numerical simulations and considering Reynolds and Ekman numbers as controlling parameters. The tendency…

流体动力学 · 物理学 2019-02-01 Mauro Fontana , Pablo D. Mininni , Pablo Dmitruk

Magnonic crystals are structures with periodically varied magnetic properties that are used to control collective spin-wave excitations. With micromagnetic simulations, we study spin-wave spectra in a 2D antidot lattice based on a…

介观与纳米尺度物理 · 物理学 2022-12-14 M. Moalic , M. Krawczyk , M. Zelent

Altermagnets are a new class of magnetic materials with zero net magnetization (like antiferromagnets) but spin-split electronic bands (like ferromagnets) over a fraction of reciprocal space. As in antiferromagnets, magnons in altermagnets…

介观与纳米尺度物理 · 物理学 2025-11-12 A. T. Costa , J. C. G. Henriques , J. Fernández-Rossier

The strong Coulomb correlations effects in the electronic structure of magnetic Co adatom on the Pt(111) surface have been investigated. Using a realistic five d-orbital impurity Anderson model at low temperatures with parameters determined…

强关联电子 · 物理学 2015-05-19 V. V. Mazurenko , S. N. Iskakov , A. N. Rudenko , V. I. Anisimov , A. I. Lichtenstein

The magnetoresistance of classical two-dimensional electrons scattered by randomly distributed impurities is investigated by numerical simulation. At low magnetic fields, we find for the first time a negative magnetoresistance proportional…

介观与纳米尺度物理 · 物理学 2009-11-07 Alexander Dmitriev , Michel Dyakonov , Remi Jullien

We report on time-resolved Kerr rotation measurements of spin coherence of electrons in the first excited subband of a high-mobility low-density two-dimensional electron system in a GaAs/Al0.35Ga0.65As heterostructure. While the transverse…

材料科学 · 物理学 2015-05-13 Haihui Luo , Xuan Qian , Xuezhong Ruan , Yang Ji

The electrical resistivity including the Kondo resistivity increase at low temperature is calculated for thin films of dilute magnetic alloys. Assuming that in the non-magnetic host the spin-orbit interaction is strong like in Au and Cu,…

强关联电子 · 物理学 2009-10-30 O. Ujsaghy , A. Zawadowski

One-dimensional (1D) magnetism offers unidirectional spin interactions that allow unique tunable properties and unconventional spin phenomena. However, it often suffers from poor stability, limiting practical applications. In this regard,…

We study the global bending modes of a thin annular disc subject to both an internally generated magnetic field and a magnetic field due to a dipole embedded in the central star with axis aligned with the disc rotation axis. When there is a…

天体物理学 · 物理学 2007-05-23 Vasso Agapitou , John C. B. Papaloizou , Caroline Terquem

We investigated the spin dynamics of two-dimensional electrons in (001) GaAs/AlGaAs heterostructure using the time resolved Kerr rotation technique under a transverse magnetic field. The in-plane spin lifetime is found to be anisotropic…

介观与纳米尺度物理 · 物理学 2012-03-30 Baoli Liu , Hongming Zhao , Jia Wang , Linsheng Liu , Wenxin Wang , Haijun Zhu , Dongmin Chen

In Co-nanotubes with a curling magnetization, the orbital motion of the conduction electrons interacts with their spin. We predict that the (absolute) value of the magnetic energy of the spin is strongly reduced. The new precession axis for…

介观与纳米尺度物理 · 物理学 2015-03-16 G. Bergmann , R. S. Thompson , J. G. Lu

The empirical spectra and $E2$ decay rates in $^{110,112,114,116}$Cd are shown to be consistent with a vibrational interpretation for low-lying normal states, coexisting with a single deformed $\gamma$-soft band of intruder states. The…

核理论 · 物理学 2023-10-02 N. Gavrielov , J. E. Garcia-Ramos , P. Van Isacker , A. Leviatan

We present an extensive Monte Carlo investigation of the metastable lifetime through the reversal of the magnetization of spin-$s$ Ising and Blume-Capel models, where $s=\{1/2, 1, 3/2, 2, 5/2, 3, 7/2\}$. The mean metastable lifetime (or…

统计力学 · 物理学 2021-07-14 Moumita Naskar , Muktish Acharyya , Erol Vatansever , Nikolaos G Fytas

A repulsively interacting Bose-Einstein condensate on a ring is well known to show persistent currents. For attractive interactions, however, a bound state may form that renders the rotation classical. Here we show that in a…

量子气体 · 物理学 2024-03-01 K. Mukherjee , T. Arnone Cardinale , S. M. Reimann

Non-equilibrium dynamics in a Ag(Mn) spin glass are investigated by measurements of the temperature dependence of the remanent magnetisation. Using specific cooling protocols before recording the thermo- or isothermal remanent…

材料科学 · 物理学 2009-10-31 R. Mathieu , P. Jönsson , D. N. H. Nam , P. Nordblad

Altermagnets are colinear compensated magnets whose magnetic symmetries at zero spin-orbit coupling break spin degeneracy leading to spin-split electronic and magnonic bands that reflect an underlying multipolar order. When there is an…

强关联电子 · 物理学 2024-10-15 P. A. McClarty , A. Gukasov , J. G. Rau

We consider the time evolution of entanglement in a finite two dimensional transverse Ising model. The model consists of a set of 7 localized spin-1/2 particles in a two dimensional triangular lattice coupled through nearest neighbor…

量子物理 · 物理学 2015-03-18 Qing Xu , Gehad Sadiek , Sabre Kais

The generalized Fisher super-exchange antiferromagnetic model with uniaxial crystal-field anisotropy is exactly investigated using an extended mapping technique. An exact relation between partition function of the studied system and that…

统计力学 · 物理学 2007-05-23 Lucia Canova , Michal Jascur

Here we present a new perspective to the breakdown of ferromagnetic order in two-dimensional spin-lattice models employing the rotation of the underlying lattice. Using an Ising spin system on a square lattice as a prototype, we demonstrate…

统计力学 · 物理学 2021-08-17 Claudio J DaSilva , L. S. Ferreira , A. A. Caparica