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5 papers · 2 filters
Supersolids versus phase separation in two-dimensional lattice bosons
Pinaki Sengupta, Leonid P. Pryadko, Fabien Alet +2
We study the nature of the ground state of the strongly-coupled two dimensional extended boson Hubbard model on a square lattice. We demonstrate that strong but finite on-site inte…
Anisotropic field dependence of the magnetic transition in Cu2Te2O5Br2
A. V. Sologubenko, R. Dell'Amore, H. R. Ott +1
We present the results of measurements of the thermal conductivity of Cu2Te2O5Br2, a compound where tetrahedra of Cu^{2+} ions carrying S=1/2 spins form chains along the c-axis of…
Orbital and spin correlations in CaSrRuO: A mean field study
Manfred Sigrist, Matthias Troyer
The alloy CaSrRuO exhibits a complex phase diagram with peculiar magnetic metallic phases. In this paper some aspects of this alloy are discussed based on a mean fi…
Metamagnetism of itinerant electrons in multi-layer ruthenates
B. Binz, M. Sigrist
The problem of quantum criticality in the context of itinerant ferro- or metamagnetism has received considerable attention [S. A. Grigera et. al., Science 294, 329 (2001); C. Pflei…
Ehrenfest relations and magnetoelastic effects in field-induced ordered phases
Masashige Matsumoto, Manfred Sigrist
Magnetoelastic properties in field-induced magnetic ordered phases are studied theoretically based on a Ginzburg-Landau theory. A critical field for the field-induced ordered phase…