Zero-temperature phase diagram for strongly correlated nanochains

Tunable “Doniach Phase Diagram” for strongly-correlated nanoclusters

Exact diagonalization calculations reveal that the energy spacing ∆ in the conduction band tunes the interplay between the local Kondo and non local RKKY interactions, giving rise to a “Doniach phase diagram” for a nanocluster with regions of prevailing Kondo or RKKY correlations. The parity of the total number of electrons alters the competition between the Kondo and RKKY correlations. This in...

Evolution of the dynamical pairing across the phase diagram of a strongly correlated high-temperature superconductor.

We study the dynamics of the Cooper pairing across the T = 0 phase diagram of the two-dimensional Hubbard model, relevant for high-temperature superconductors, using a cluster extension of dynamical mean-field theory. We find that the superconducting pairing function evolves from an unconventional form in the overdoped region into a more conventional boson-mediated retarded form in the underdop...

Comment on "Direct mapping of the finite temperature phase diagram of strongly correlated quantum models".

Zero temperature phase diagram of the Kitaev model.

We show that the zero-temperature phase diagram of the vortex free sector of the Kitaev model is in one-to-one correspondence with that of the classical dimer model on the same lattice. We find that the model generically has three distinct phases. On a honeycomb lattice with a 3 x 3 fundamental domain all three phases are accessible. As the couplings are varied, there are two distinct transitio...

Zero temperature phase diagram of the square-shoulder system.

Particles that interact via a square-shoulder potential, consisting of an impenetrable hard core with an adjacent, repulsive, steplike corona, are able to self-organize in a surprisingly rich variety of rather unconventional ordered, three-dimensional structures. Using optimization strategies that are based on ideas of genetic algorithms, we encounter, as we systematically increase the pressure...