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The relation between crystal symmetries, electron correlations, and electronic structure steers the formation of a large array of unconventional phases of matter, including magneto-electric loop currents and chiral magnetism. Detection of…

We evaluate the charge and longitudinal spin response functions of a two-dimensional electron gas with $e^2/r$ interactions in an arbitrary state of spin polarization, using a structurally self-consistent approach to treat exchange and…

Strongly Correlated Electrons · Physics 2015-06-24 B. Davoudi , M. P. Tosi

The magnetic properties and phase diagrams of the mixed spin Ising model, with spins S=1 and {\sigma}=1/2 on a centered rectangular structure, have been investigated using Monte Carlo simulations based on the Metropolis algorithm. Every…

Statistical Mechanics · Physics 2022-09-21 Maen Gharaibeh , Rama Abu Haifa , Abdalla Obeidat , Mohammad H. A. Badarneh , M. K Qaseer

For 2D Hubbard model with spin-orbit Rashba coupling in external magnetic field the structure of effective spin interactions is studied in the regime of strong electron correlations and at half-filling. It is shown that in the third order…

Mesoscale and Nanoscale Physics · Physics 2023-05-31 M. S. Shustin , V. A. Stepanenko , D. M. Dzebisashvili

Magnetic skyrmions are promising for next-generation information storage and processing owing to their potential advantages in data storage density, robustness, and energy efficiency. The magnetic multilayers consisting of Pt, Co, and a…

We present combined experimental and theoretical investigation of the low-frequency ESR dynamics in the ordered phases of magnetic mineral linarite. This material consists of weakly coupled spin-1/2 chains of copper ions with frustrated…

Strongly Correlated Electrons · Physics 2019-11-19 S. K. Gotovko , L. E. Svistov , A. M. Kuzmenko , A. Pimenov , M. E. Zhitomirsky

We present the results of Monte Carlo simulations of the magnetic properties of individual spherical nanoparticles with the aim to explain the role played by surface anisotropy on their low temperature magnetization processes. Phase…

Materials Science · Physics 2009-09-29 Oscar Iglesias , Amilcar Labarta

We investigate the magnetic properties of quark matter in the inhomogeneous chiral phase, where both scalar and pseudoscalar condensates spatially modulate. The energy spectrum of the lowest Landau level becomes asymmetric about zero in the…

High Energy Physics - Phenomenology · Physics 2016-05-27 Ryo Yoshiike , Kazuya Nishiyama , Toshitaka Tatsumi

Magnetic skyrmions are swirling spin textures with topologically protected noncoplanarity. Recently, skyrmions with the topological number of unity have been extensively studied in both experiment and theory. We here show that a skyrmion…

Strongly Correlated Electrons · Physics 2018-10-24 Ryo Ozawa , Satoru Hayami , Yukitoshi Motome

Magnetic excitations in ferromagnetic systems with a noncollinear ground state magnetization experience a fictitious magnetic field due to the equilibrium magnetic texture. Here, we investigate how such fictitious fields lead to thermal…

Mesoscale and Nanoscale Physics · Physics 2015-06-11 Kevin A. van Hoogdalem , Yaroslav Tserkovnyak , Daniel Loss

We study an effective low-energy Kondo model on the triangular lattice in which itinerant electrons occupy a valence pocket at $\Gamma$ and three conduction pockets at the $M$ points of the Brillouin zone. This construction has a…

Strongly Correlated Electrons · Physics 2026-04-21 Kai Vylet , Xingkai Huang , Leon Balents

Applied magnetic fields are an important tuning parameter for artificial spin ice (ASI) systems, as they can drive phase transitions between different magnetic ground states, or tune through regimes with high populations of emergent…

Mesoscale and Nanoscale Physics · Physics 2022-03-14 M. Goryca , X. Zhang , J. D. Watts , C. Nisoli , C. Leighton , P. Schiffer , S. A. Crooker

We study theoretically the transport properties of a three-dimensional spin texture made from three orthogonal helices, which is essentially a lattice of monopole-antimonopole pairs connected by Skyrmion strings. This spin structure is…

Mesoscale and Nanoscale Physics · Physics 2016-12-01 Xiao-Xiao Zhang , Andrey S. Mishchenko , Giulio De Filippis , Naoto Nagaosa

Motivated by recent experimental observations in $\alpha$-RuCl$_3$, we study the $K$-$\Gamma$ model on the honeycomb lattice in an external magnetic field. By a slave-particle representation and Variational Monte Carlo calculations, we…

Strongly Correlated Electrons · Physics 2018-05-15 Zheng-Xin Liu , Bruce Normand

We construct the general free energy governing long-wavelength magnetism in two-dimensional oxide heterostructures, which applies irrespective of the microscopic mechanism for magnetism. This leads, in the relevant regime of weak but…

Strongly Correlated Electrons · Physics 2014-02-14 Xiaopeng Li , W. Vincent Liu , Leon Balents

We develop a theory for the thermal Hall coefficient in a spin-$\frac{1}{2}$ system on a strip of Kagome lattice, where a chiral spin-interaction term is present. To this end, we model the Kagome strip as a three-leg $XXZ$ spin-ladder, and…

Strongly Correlated Electrons · Physics 2019-06-06 Pavel Tikhonov , Efrat Shimshoni

A magnetic skyrmion is a spin whirl with topological protection and high mobility to electric current. Intrinsic magnetoelastic coupling in chiral magnets permits manipulation of magnetic skyrmions and their lattice using mechanical loads,…

Mesoscale and Nanoscale Physics · Physics 2017-12-12 Yangfan Hu , Biao Wang

Cylindrical magnetic nanowires with large transversal magnetocrystalline anisotropy have been shown to sustain non-trivial magnetic configurations resulting from the interplay of spatial confinement, exchange, and anisotropies. Exploiting…

Mesoscale and Nanoscale Physics · Physics 2021-07-29 I. M. Andersen , D. Wolf , L. A. Rodriguez , A. Lubk , D. Oliveros , C. Bran , T. Niermann , U. K. Rößler , M. Vazquez , C. Gatel , E. Snoeck

We present a review of dynamics of entanglement in one and two dimensional systems under the effect of external magnetic field and different degrees of anisotropy at zero and finite temperatures. Different techniques for treating the spin…

Quantum Physics · Physics 2013-11-01 Gehad Sadiek , Qing Xu , Sabre Kais

We study the discrete-to-continuum variational limit of the antiferromagnetic XY model on the two-dimensional triangular lattice. The system is fully frustrated and displays two families of ground states distinguished by the chirality of…

Analysis of PDEs · Mathematics 2020-04-06 Annika Bach , Marco Cicalese , Leonard Kreutz , Gianluca Orlando