The "Kondo-necklace" model is studied by exact numerical diagonalization on finite chains up to N = 12 sites. The gap extrapolated to infinite systems can be well fitted by a Kosterlitz-Thouless-like form with a critical coupling (J/W)c = 0.24. Although this value is appreciably smaller than the best estimate from real-space renormalization, our results indicate strongly a finite critical coupling in contrast to the one-dimensional Kondo lattice.

FINITE-SIZE-SCALING STUDY OF THE GAP FORMATION IN THE KONDO-NECKLACE MODEL / P. SANTINI; J. SOLYOM. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - 46(1992), pp. 7422-7426. [10.1103/PhysRevB.46.7422]

FINITE-SIZE-SCALING STUDY OF THE GAP FORMATION IN THE KONDO-NECKLACE MODEL

SANTINI, Paolo;
1992

Abstract

The "Kondo-necklace" model is studied by exact numerical diagonalization on finite chains up to N = 12 sites. The gap extrapolated to infinite systems can be well fitted by a Kosterlitz-Thouless-like form with a critical coupling (J/W)c = 0.24. Although this value is appreciably smaller than the best estimate from real-space renormalization, our results indicate strongly a finite critical coupling in contrast to the one-dimensional Kondo lattice.
FINITE-SIZE-SCALING STUDY OF THE GAP FORMATION IN THE KONDO-NECKLACE MODEL / P. SANTINI; J. SOLYOM. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - 46(1992), pp. 7422-7426. [10.1103/PhysRevB.46.7422]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2432911
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