TY - JOUR
T1 - Numerical solution of the t-J model with random exchange couplings in d=∞ dimensions
AU - Otsuki, Junya
AU - Vollhardt, Dieter
PY - 2013/5/10
Y1 - 2013/5/10
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.110.196407
DO - 10.1103/PhysRevLett.110.196407
M3 - Article
AN - SCOPUS:84877800959
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 19
M1 - 196407
ER -