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Electronic Thermal Conductivity of Multi-Gap Superconductors with Application to MgB_2
Hiroaki Kusunose, T. M. Rice, Manfred Sigrist
The remarkable field dependence of the electronic thermal conductivity observed in MgB_2 can be explained as a consequence of multi-gap superconductivity. A key point is that for m…
Magnon Dispersion in the Field-Induced Magnetically Ordered Phase of TlCuCl3
Masashige Matsumoto, B. Normand, T. M. Rice +1
The magnetic properties of the interacting dimer system TlCuCl3 are investigated within a bond-operator formulation. The observed field-induced staggered magnetic order perpendicul…
Landau-Fermi liquid analysis of the 2D t-t' Hubbard model
P. A. Frigeri, C. Honerkamp, T. M. Rice
We calculate the Landau interaction function f(k,k') for the two-dimensional t-t' Hubbard model on the square lattice using second and higher order perturbation theory. Within the…
Flow to strong coupling in the two-dimensional Hubbard model
C. Honerkamp, M. Salmhofer, T. M. Rice
We extend the analysis of the renormalization group flow in the two-dimensional Hubbard model close to half-filling using the recently developed temperature flow formalism. We inve…
First-order transition between a small-gap semiconductor and a ferromagnetic metal in the isoelectronic alloys FeSiGe
V. I. Anisimov, R. Hlubina, M. A. Korotin +4
The contrasting groundstates of isoelectronic and isostructural FeSi and FeGe can be explained within an extended local density approximation scheme (LDA+U) by an appropriate choic…
The transition between hole-pairs and four-hole clusters in four-leg tJ ladders
Thomas Siller, Matthias Troyer, T. M. Rice +1
Holes weakly doped into a four-leg \tj ladder bind in pairs. At dopings exceeding a critical doping of four hole clusters are observed to form in DMRG calculation…