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- Max Planck Institute for Mathematics in the SciencesDE139 papers
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4 papers · 2 filters
Ferromagnetic- and Superconducting-like Behavior of Graphite
Y. Kopelevich, P. Esquinazi, J. H. S. Torres +1
We have identified ferromagnetic- and superconducting-like magnetization hysteresis loops in highly oriented pyrolytic graphite samples below and above room temperature. We also fo…
Spin correlation functions and susceptibilities in the easy-plane XXZ chain
C. Schindelin, H. Fehske, H. Büttner +1
We present a Green's-function theory of magnetic short-range order in the easy-plane XXZ chain based on the projection method for the dynamic spin susceptibility and a deco…
Spin correlation functions and Néel order in the 2D Heisenberg model: Effects of spatial anisotropy
C. Schindelin, D. Ihle, S. -L. Drechsler +1
The ground-state properties of the square-lattice spin-1/2 Heisenberg antiferromagnet with spatially anisotropic couplings are investigated by Green's-function projection approache…
Magnetic Order-Disorder Transition in the Two-Dimensional Spatially Anisotropic Heisenberg Model at Zero Temperature
D. Ihle, C. Schindelin, A. Weisse +1
The ground-state properties of the spin-1/2 antiferromagnetic Heisenberg model with spatially anisotropic couplings on a square lattice are investigated by a spin-rotation-invarian…