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18 papers · 1 filter
Orbital polaron lattice formation in lightly doped La1-xSrxMnO3
J. Geck, P. Wochner, S. Kiele +4
By resonant x-ray scattering at the Mn K-edge on La7/8Sr1/8MnO3, we show that an orbital polaron lattice (OPL) develops at the metal-insulator transition of this compound. This orb…
Magnon Heat Conductivity and Mean Free Paths in Two-Leg Spin Ladders: A Model-Independent Determination
C. Hess, P. Ribeiro, B. Büchner +4
The magnon thermal conductivity of the spin ladders in has been investigated at low doping levels , 0.125, 0.25, 0.5 and 0.…
Renormalization group approach to interacting fermion systems in the two-particle-irreducible formalism
N. Dupuis
We describe a new formulation of the functional renormalization group (RG) for interacting fermions within a Wilsonian momentum-shell approach. We show that the Luttinger-Ward func…
Strongly correlated properties of the thermoelectric cobalt oxide Ca3Co4O9
P. Limelette, V. Hardy, P. Auban-Senzier +7
We have performed both in-plane resistivity, Hall effect and specific heat measurements on the thermoelectric cobalt oxide CaCoO. Four distinct transport regimes…
Renormalization Group calculations with k|| dependent couplings in a ladder
G. Abramovici, J. C. Nickel, M. Heritier
We calculate the phase diagram of a ladder system, with a Hubbard interaction and an interchain coupling . We use a Renormalization Group method, in a one loop expansion,…
Evidence of a single nonmagnetic Co3+ state in the Na1CoO2 cobaltate
G. Lang, J. Bobroff, H. Alloul +3
Macroscopic magnetization, muon spin rotation (muSR), and NMR measurements were carried out to study magnetism in the Na1CoO2 cobaltate. Using SQUID measurements, Na1CoO2 is shown…