Phase transitions in the symmetric Kondo-lattice model in two and three dimensions

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.51.15630· OSTI ID:54966

Shi, Z; Singh, R R.P. ^[1]; Gelfand, M P ^[2]; Wang, Z ^[3]

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1. Department of Physics, University of California, Davis, California 95616 (United States)
2. Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
3. Department of Physics, Boston University, Boston, Massachusetts 02215 (United States)

We present an application of high-order series expansion in the coupling constants for the ground-state properties of correlated lattice fermion systems. Expansions have been generated up to order ({ital t}/{ital J}){sup 14} for {ital d}=1 and ({ital t}/{ital J}){sup 8} for {ital d}=2,3 for certain properties of the symmetric Kondo-lattice model. Analyzing the susceptibility series, we find evidence for a continuous phase transition from the spin-liquid phase characteristic of a Kondo insulator to an antiferromagnetically ordered phase in dimensions {ital d}{ge}2 as the antiferromagnetic Kondo coupling is decreased. The critical point is estimated to be at ({ital t}/{ital J}){sub {ital c}}{approx}0.7 for a square lattice and ({ital t}/{ital J}){sub {ital c}}{approx}0.5 for a simple-cubic lattice.

• OSTI ID: 54966
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 51; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTIFERROMAGNETISM
COUPLING CONSTANTS
CRITICAL TEMPERATURE
FERMIONS
KONDO EFFECT
MAGNETIC SUSCEPTIBILITY
MANY-BODY PROBLEM
PERTURBATION THEORY
PHASE TRANSFORMATIONS
SERIES EXPANSION