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NATO science for peace and security series. B, Physics and biophysics

Nonequilibrium Density Of States And Distribution Functions For Strongly Correlated Materials Across The Mott Transition

James K. Freericks, A. V. Joura

Published Feb 10, 2010• 6 citations
Publisher
DOI
10.1007/978-1-4020-9146-9_17

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The one-body picture underlies our understanding of weakly interacting solids but breaks down in strongly correlated systems. We develop a general framework, based on the single-particle Green's function and the one-body reduced density matrix (1RDM), to characterize correlated electronic phases. Applying it to the Hubbard diamond chain, we combine density matrix renormalization group and cellular dynamical mean-field theory to construct symmetry-resolved effective orbitals and track their evolution across its Mott transitions, while the 1RDM purity provides a scalar indicator of the phase boundaries. These tools offer a general route to extend one-body concepts to correlated materials.