We find evidence that superconductivity intrudes into the paramagnetic-to-magnetic transition of the Kondo lattice model if magnetic frustration is added. Specifically, we study by the variational method the model on a square lattice in the presence of both nearest-neighbor (t) and next-nearest-neighbor (t�) hopping of the conduction electrons. We find that, when t�/t>0, a d-wave superconducting dome emerges between the magnetic and paramagnetic metal phases and close to the compensated regime, i.e., the number of conduction electrons equals the number of localized spin-1/2 moments. Superconductivity is further strengthened by a direct antiferromagnetic exchange, JH, between the localized moments, to such an extent that we observe coexistence with magnetic order. � 2014 American Physical Society.

Superconductivity from spoiling magnetism in the Kondo lattice model / Asadzadeh, Mohammad Zhian; Fabrizio, Michele; Becca, Federico. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 90:20(2014), pp. 1-5. [10.1103/PhysRevB.90.205113]

Superconductivity from spoiling magnetism in the Kondo lattice model

Asadzadeh, Mohammad Zhian;Fabrizio, Michele;Becca, Federico
2014-01-01

Abstract

We find evidence that superconductivity intrudes into the paramagnetic-to-magnetic transition of the Kondo lattice model if magnetic frustration is added. Specifically, we study by the variational method the model on a square lattice in the presence of both nearest-neighbor (t) and next-nearest-neighbor (t�) hopping of the conduction electrons. We find that, when t�/t>0, a d-wave superconducting dome emerges between the magnetic and paramagnetic metal phases and close to the compensated regime, i.e., the number of conduction electrons equals the number of localized spin-1/2 moments. Superconductivity is further strengthened by a direct antiferromagnetic exchange, JH, between the localized moments, to such an extent that we observe coexistence with magnetic order. � 2014 American Physical Society.
2014
90
20
1
5
205113
https://arxiv.org/abs/1403.2631
Asadzadeh, Mohammad Zhian; Fabrizio, Michele; Becca, Federico
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/14328
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