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39 papers · 2 filters
Reversible Tuning of the Heavy Fermion Ground State in CeCoIn
L. D. Pham, Tuson Park, S. Maquilon +2
Cadmium-doping the heavy-fermion superconductor CeCoIn at the percent level acts as an electronic tuning agent, sensitively shifting the balance between superconductivity and a…
Magnetostriction in the Bose-Einstein Condensate quantum magnet NiCl2-4SC(NH2)2
V. S. Zapf, V. F. Correa, C. D. Batista +6
The quantum magnet NiCl-4SC(NH) is a candidate for observing Bose-Einstein Condensation of spin degrees of freedom in applied magnetic fields. An XY antiferromagnetic o…
Numerical solution of the Holstein polaron problem
H. Fehske, S. A. Trugman
We performed an extensive numerical analysis of the Holstein model. Combining variational Lanczos diagonalisation, density matrix renormalisation group, kernel polynomial expansion…
Theory of quasiparticle spectra for Fe, Co, and Ni: bulk and surface
Alexei Grechnev, Igor Di Marco, M. I. Katsnelson +3
The correlated electronic structure of iron, cobalt and nickel is investigated within the dynamical mean-field theory formalism, using the newly developed full-potential LMTO-based…
Magnetic field induced lattice anomaly inside the superconducting state of CeCoIn: evidence of the proposed Fulde-Ferrell-Larkin-Ovchinnikov state
V. F. Correa, T. P. Murphy, C. Martin +5
We report high magnetic field linear magnetostriction experiments on CeCoIn single crystals. Two features are remarkable: (i) a sharp discontinuity in all the crystallographic…
Absence of Wigner Crystallization in Graphene
Hari P Dahal, Yogesh N. Joglekar, Kevin S. Bedell +1
Graphene, a single sheet of graphite, has attracted tremendous attention due to recent experiments which demonstrate that carriers in it are described by massless fermions with lin…