Quantum Monte Carlo simulations of many-body phenomena in a single-impurity Anderson model

Journal Article · Wed Jul 01 00:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.394· OSTI ID:6490480

Gubernatis, J E

Over a limited temperature range, we were able to simulate, with a quantum Monte Carlo method, the major many-body phenomena in a single-impurity Anderson model. These phenomena include local-moment formation, mixed-valence behavior, and the Kondo effect. For some choices of parameters we reached sufficiently low temperatures that our calculations of Tchi/sub d/ agreed with the universal Kondo-impurity susceptibility computed by the renormalization-group technique. We also calculated the correlations between the spin and charge at the impurity and those at the lattice sites. In these correlations we observed oscillations reminiscent of Ruderman-Kittel-Kasuya-Yosida and Friedel oscillations. We also discuss the possibility of extending our calculations to the two-impurity and lattice Anderson Hamiltonians.

• Research Organization: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6490480
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 36:1
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
METALS
IMPURITIES
KONDO EFFECT
CHARGE DENSITY
CORRELATIONS
CRYSTAL LATTICES
HAMILTONIANS
MANY-BODY PROBLEM
MONTE CARLO METHOD
SIMULATION
SPIN
ANGULAR MOMENTUM
CRYSTAL STRUCTURE
ELEMENTS
MATHEMATICAL OPERATORS
PARTICLE PROPERTIES
QUANTUM OPERATORS
656002* - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)