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22 papers · 1 filter
Barlowite as a canted antiferromagnet: theory and experiment
Harald O. Jeschke, Francesc Salvat-Pujol, Elena Gati +5
We investigate the structural, electronic and magnetic properties of the newly synthesized mineral barlowite Cu4(OH)6FBr which contains Cu2+ ions in a perfect kagome arrangement. I…
Coupled Spin and Shape Evolution of Small Rubble-Pile Asteroids: Self-Limitation of the YORP Effect
Desireé Cotto-Figueroa, Thomas S. Statler, Derek C. Richardson +1
We present the first self-consistent simulations of the coupled spin-shape evolution of small gravitational aggregates under the influence of the YORP effect. Because of YORP's sen…
Barlowite: A Spin-1/2 Antiferromagnet with a Geometrically Perfect Kagome Motif
Tian-Heng Han, John Singleton, John A. Schlueter
We present thermodynamic studies of a new spin-1/2 antiferromagnet containing undistorted kagome lattices---barlowite Cu(OH)FBr. Magnetic susceptibility gives …
Two Local Volume Dwarf Galaxies Discovered in 21 cm Emission: Pisces A and B
Erik J. Tollerud, Marla C. Geha, Jana Grcevich +2
We report the discovery of two dwarf galaxies, Pisces A and B, from a blind 21 cm HI search. These were the only two galaxies found via optical imaging and spectroscopy of 22 HI cl…
Fast Computing for Distance Covariance
Xiaoming Huo, Gabor J. Szekely
Distance covariance and distance correlation have been widely adopted in measuring dependence of a pair of random variables or random vectors. If the computation of distance covari…
An auxiliary space multigrid preconditioner for the weak Galerkin method
Long Chen, Junping Wang, Yanqiu Wang +1
In this paper, the authors constructed an auxiliary space multigrid preconditioner for the weak Galerkin finite element method for second-order diffusion equations, discretized on…