Competition between antiferromagnetic order and spin-liquid behavior in the two-dimensional periodic Anderson model at half filling

Journal Article · Mon Mar 20 00:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.2367· OSTI ID:6400674

Vekic, M; Cannon, J W; Scalapino, D J; Scalettar, R T; Sugar, R L ^[1]

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1. Department of Physics, University of California, Davis, California 95616 (United States) Physics Department, Centenary College, 2911 Centenary Boulevard, Shreveport, Louisiana 71104 (United States) Department of Physics, University of California, Santa Barbara, California 93106 (United States)

We study the two-dimensional periodic Anderson model at half filling using quantum Monte Carlo (QMC) techniques. The ground state undergoes a magnetic order-disorder transition as a function of the effective exchange coupling between the conduction and localized bands. Low-lying spin and charge excitations are determined using the maximum entropy method to analytically continue the QMC data. At finite temperature we find a competition between the Kondo effect and antiferromagnetic order which develops in the localized band through Ruderman-Kittel-Kasuya-Yosida interactions.

• DOE Contract Number: FG03-85ER45197
• OSTI ID: 6400674
• Journal Information: Physical Review Letters; (United States), Vol. 74:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAGNETISM
MONTE CARLO METHOD
ANTIFERROMAGNETISM
ELECTRONIC STRUCTURE
KONDO EFFECT
ORDER-DISORDER TRANSFORMATIONS
RUDERMAN-KITTEL COUPLING
TWO-DIMENSIONAL CALCULATIONS
CALCULATION METHODS
COUPLING
PHASE TRANSFORMATIONS
665430* - Other Topics in Quantum Fluids & Solids- (1992-)
661300 - Other Aspects of Physical Science- (1992-)