Numerical solution of the t-J model with random exchange couplings in d=∞ dimensions

Junya Otsuki, Dieter Vollhardt

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To explore the nature of the metallic state near the transition to a Mott insulator, we investigate the t-J model with random exchange interaction in d=∞ dimensions. A numerically exact solution is obtained by an extension of the continuous-time quantum Monte Carlo method to the case of a vector bosonic field coupled to a local spin. We show that the paramagnetic solution near the Mott insulator describes an incoherent metal with a residual moment, and that single-particle excitations produce an additional band, which is separated from the Mott-Hubbard band.

Original languageEnglish
Article number196407
JournalPhysical Review Letters
Issue number19
Publication statusPublished - May 10 2013
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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