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

Junya Otsuki, Dieter Vollhardt

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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
Volume110
Issue number19
DOIs
Publication statusPublished - May 10 2013
Externally publishedYes

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insulators
Monte Carlo method
moments
metals
excitation
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Numerical solution of the t-J model with random exchange couplings in d=∞ dimensions. / Otsuki, Junya; Vollhardt, Dieter.

In: Physical Review Letters, Vol. 110, No. 19, 196407, 10.05.2013.

Research output: Contribution to journalArticle

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