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Hardcore bosons on honeycomb lattice ribbons with zigzag edges are studied using exact numerical simulations. We map out the phase diagrams of ribbons with different widths, which contain superfluid and insulator phases at various fillings.…

Strongly Correlated Electrons · Physics 2020-02-05 Xingchuan Zhu , Shiying Dong , Yang Lin , Rubem Mondaini , Huaiming Guo , Shiping Feng , Richard T. Scalettar

Charged domain walls are a type of domain walls in thin ferromagnetic films which appear due to global topological constraints. The non-dimensionalized micromagnetic energy for a uniaxial thin ferromagnetic film with in-plane magnetization…

Analysis of PDEs · Mathematics 2021-02-01 Hans Knüpfer , Wenhui Shi

Analyzing the magnetic structure factor of a field demagnetized artificial square ice, qualitative deviations from what would predict the square ice model are observed. Combining micromagnetic and Monte Carlo simulations, we demonstrate…

Mesoscale and Nanoscale Physics · Physics 2021-03-10 O. Brunn , Y. Perrin , B. Canals , N. Rougemaille

We propose a mechanism to generate large-scale magnetic fields with correlation lengths of 100 kpc. Domain walls with QCD scale internal structure form and coalesce obtaining Hubble scale correlations and align nucleon spins. Due to strong…

High Energy Physics - Phenomenology · Physics 2009-10-31 Michael McNeil Forbes , Ariel R. Zhitnitsky

Magnetic domain walls, which are crucially important in both fundamental physics and technical applications, often have a preference in their form due to many different origins, such as the crystalline shape, lattice symmetry, and magnetic…

Strongly Correlated Electrons · Physics 2017-09-20 Ryo Ozawa , Satoru Hayami , Kipton Barros , Yukitoshi Motome

Magnetic domain memory (MDM) is the ability exhibited by certain magnetic materials to reproduce the exact same nanoscale magnetic domain pattern, even after it has been completely erased by an external magnetic field. In this chapter, we…

Mesoscale and Nanoscale Physics · Physics 2020-07-13 Karine Chesnel

So far magnetic domain walls in one-dimensional structures have been described theoretically only in the cases of flat strips, or cylindrical structures with a compact cross-section, either square or disk. Here we describe an extended phase…

Mesoscale and Nanoscale Physics · Physics 2014-12-03 Ségolène Jamet , Nicolas Rougemaille , Jean-Christophe Toussaint , Olivier Fruchart

Altermagnets recently came into the spotlight as a new class of magnetic materials, arising as a consequence of specific crystal symmetries. They are characterized by a spin-polarized electronic band structure similar to ferromagnets, but…

Direct detection of spontaneous spin fluctuations, or "magnetization noise", is emerging as a powerful means of revealing and studying magnetic excitations in both natural and artificial frustrated magnets. Depending on the lattice and…

Mesoscale and Nanoscale Physics · Physics 2023-11-15 M. Goryca , X. Zhang , J. Ramberger , J. D. Watts , C. Nisoli , C. Leighton , P. Schiffer , S. A. Crooker

To characterize the possible magnetic structures created on magnetic multilayers a model has been formulated and studied. The interlayer inhomogeneous structures found indicate either (i) a regular periodic, (ii) a quasiperiodic change in…

Materials Science · Physics 2009-10-31 F. V. Kusmartsev , H. S. Dhillon , M. D. Crapper

Ultracold atomic spin mixtures develop rich and intriguing magnetic properties when an external radiation coherently couples different spin states. In particular, the coupled mixture may acquire a critical behavior when the spin…

Magnetic analogue of an isolated free electric charge, i.e., a magnet with a single north or south pole, is a long sought-after particle which remains elusive so far. In magnetically frustrated pyrochlore solids, a classical analogue of…

Mesoscale and Nanoscale Physics · Physics 2021-07-02 N. Keswani , R. Lopes , Y. Nakajima , R. Singh , N. Chauhan , T. Som , S. Kumar , A. R. Pereira , P. Das

Monte Carlo simulations applied to the Spin-Fermion model for cuprates show the existence of antiferromagnetic spin domains and charge stripes upon doping. The stripes are partially filled, with a filling of approximately 1/2 hole per site,…

Strongly Correlated Electrons · Physics 2009-10-31 Charles Buhler , Seiji Yunoki , Adriana Moreo

MnTe has recently emerged as a canonical altermagnet, a newly identified class of magnetism characterized by compensated antiferromagnetic order coexisting with spin-split electronic bands, traditionally considered exclusive to…

Motivated by the recent discovery of Mott insulating phase and unconventional superconductivity due to the flat bands in twisted bilayer graphene, we propose more generic ways of getting two-dimensional (2D) emergent flat band lattices…

Mesoscale and Nanoscale Physics · Physics 2020-07-29 M. Tahir , Olivier Pinaud , Hua Chen

Using small-angle neutron scattering, we demonstrate that the complex magnetic domain patterns at the surface of Nd2Fe14B, revealed by quantitative Kerr and Faraday microscopy, propagate into the bulk and exhibit structural features with…

Materials Science · Physics 2009-01-29 A. Kreyssig , R. Prozorov , C. D. Dewhurst , P. C. Canfield , R. W. McCallum , A. I. Goldman

Investigating the emergence of complexity in disordered interacting systems, central to fields like spin glass physics, remains challenging due to difficulties in systematic experimental tuning. We introduce a tunable artificial spin…

Mesoscale and Nanoscale Physics · Physics 2025-06-10 Vinayak Shantaram Bhat , M. Benjamin Jungfleisch

The structure and the magnetic properties of an InGaAs/Fe3Si superlattice in a cylindrical geometry are investigated by electron microscopy techniques, x-ray diffraction and magnetometry. To form a radial superlattice, a pseudomorphic…

Solution-phase bottom up self-assembly of nanocrystals into superstructures such as ordered superlattices is an attractive strategy to generate functional materials of increasing complexity, including very recent advances that incorporate…

Fractals -- objects with non-integer dimensions -- occur in manifold settings and length scales in nature, ranging from snowflakes and lightning strikes to natural coastlines. Much effort has been expended to generate fractals for use in…

Strongly Correlated Electrons · Physics 2022-12-19 Jonathan N. Hallén , Santiago A. Grigera , D. Alan Tennant , Claudio Castelnovo , Roderich Moessner