Efeitos de desordem na transição metal-isolante de Mott / Efects of disorder on the Mott metal-insulator transition

AUTOR(ES)

Martha Yolima Suarez Villagran

DATA DE PUBLICAÇÃO

2009

RESUMO

We determine the phase diagram of the disordered Hubbard Model as a function of temperature and interaction strength by means of the Statistical Dynamical Mean Field Theory. The metallic and insulating spinodal lines are traced for weak and moderate disorder using Quantum Monte Carlo as the impurity solver. We find that disorder pushes the spinodal lines to larger interactions and smaller temperatures. Our studies show that the coexistence region of insulator and metal survives the introduction of disorder and is a robust feature of the Mott transition, at least for sufficiently small disorder strength

ASSUNTO(S)

hubbard transição de fase metal-isolante modelo de sistemas desordenados metal-insulator transistion disordered systems hubbard model

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