Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-08-01
Phys. Rev. B 84, 165133 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 2 figures
Scientific paper
10.1103/PhysRevB.84.165133
We study the continuous bandwidth-controlled Mott transition in the two-dimensional single-band Hubbard model with a focus on the critical scaling behavior of charge and spin degrees of freedom. Using plaquette cluster dynamical mean-field theory, we find charge and spin criticality consistent with experimental results for organic conductors. In particular, the charge degree of freedom measured via the local density of states at the Fermi level shows a smoother transition than expected for the Ising universality class and in single-site dynamical mean-field theory, revealing the importance of short-ranged nonlocal correlations in two spatial dimensions. The spin criticality measured via the local spin susceptibility agrees quantitatively with nuclear magnetic resonance measurements of the spin-lattice relaxation rate.
Gull Emanuel
Kampf Arno P.
Sentef Michael
Werner Philipp
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