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12 papers · 2 filters
Measuring Fermi velocities with ARPES in narrow band systems. The case of layered cobaltates
V. Brouet, A. Nicolaou, M. Zacchigna +3
ARPES is a priori a technique of choice to measure the Fermi velocities vF in metals. In correlated systems, it is interesting to compare this experimental value to that obtained i…
Momentum-resolved evolution of the Kondo lattice into 'hidden-order' in URu2Si2
F. L. Boariu, C. Bareille, H. Schwab +5
We study, using high-resolution angle-resolved photoemission spectroscopy, the evolution of the electronic structure in URu2Si2 at the Gamma, Z and X high-symmetry points from the…
Geometry fluctuations and Casimir effect in a quantum antiferromagnet
Anuradha Jagannathan, Attila Szallas
We show the presence of a Casimir type force between domain walls in a two dimensional Heisenberg antiferromagnet subject to geometrical fluctuations. The type of fluctuations that…
A resistor model for quantum criticality: quasi one-dimensional organic conductors
H. Meier, P. Auban-Senzier, C. Pépin +1
We investigate the metallic transport in the organic superconductor (TMTSF)2PF6 under pressure within the framework of the spin density wave theory in the proximity of a Peierls qu…
Localization of spinons in random Majumdar-Ghosh chains
Arthur Lavarélo, Guillaume Roux
We study the effect of disorder on frustrated dimerized spin-1/2 chains at the Majumdar-Ghosh point. Using variational methods and density-matrix renormalization group approaches,…
Lightly stuffed pyrochlore structure of single-crystalline Yb2Ti2O7 grown by the optical floating zone technique
K. A. Ross, Th. Proffen, H. A. Dabkowska +4
Recent neutron scattering and specific heat studies on the pyrochlore Yb2Ti2O7 have revealed variations in its magnetic behavior below 265mK. In the best samples, a sharp anomaly i…