The hole-doped kagome lattice of Cu2+ ions in LaCuO2.66 was investigated by nuclear quadrupole resonance, electron spin resonance, electrical resistivity, bulkmagnetization, and specific-heat measurements. For temperatures above∼180 K, the spin and charge properties showan activated behavior suggestive of a narrow-gap semiconductor. At lower temperatures, the results indicate an insulating ground state which may or may not be charge ordered. While the frustrated spins in remaining patches of the original kagome lattice might not be directly detected here, the observation of coexisting nonmagnetic sites, free spins, and frozen moments reveals an intrinsically inhomogeneous magnetism. Numerical simulations of a 1 3 -diluted kagome lattice rationalize this magnetic state in terms of a heterogeneous distribution of cluster sizes and morphologies near the site-percolation threshold.
Inhomogeneous magnetism in the doped kagome lattice of LaCuO2.66 / M. H., Julien; V., Simonet; B., Canals; R., Ballou; A. K., Hassan; Affronte, Marco; V. O., Garlea; C., Darie; P., Bordet. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 87:21(2013), pp. 214423-214429. [10.1103/PhysRevB.87.214423]
Inhomogeneous magnetism in the doped kagome lattice of LaCuO2.66
AFFRONTE, Marco;
2013
Abstract
The hole-doped kagome lattice of Cu2+ ions in LaCuO2.66 was investigated by nuclear quadrupole resonance, electron spin resonance, electrical resistivity, bulkmagnetization, and specific-heat measurements. For temperatures above∼180 K, the spin and charge properties showan activated behavior suggestive of a narrow-gap semiconductor. At lower temperatures, the results indicate an insulating ground state which may or may not be charge ordered. While the frustrated spins in remaining patches of the original kagome lattice might not be directly detected here, the observation of coexisting nonmagnetic sites, free spins, and frozen moments reveals an intrinsically inhomogeneous magnetism. Numerical simulations of a 1 3 -diluted kagome lattice rationalize this magnetic state in terms of a heterogeneous distribution of cluster sizes and morphologies near the site-percolation threshold.File | Dimensione | Formato | |
---|---|---|---|
LaCuO PRB.87.214423.pdf
Accesso riservato
Tipologia:
Abstract
Dimensione
1.26 MB
Formato
Adobe PDF
|
1.26 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris