Charge density wave in layered La1-xCexSb2
Author
Luccas, R. F.; Fente, A.; Hanko, J.; Correa-Orellana, A.; Herrera, E.; Climent-Pascual, E.; Azpeitia, J.; Pérez-Castañeda, Tomás; Osorio, M. R.; Salas-Colera, E.; Nemes, N. M.; Mompeán, Federico J.; García-Hernández, M.; Rodrigo Rodríguez, José Gabriel




Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2015-12-29Citation
10.1103/PhysRevB.92.235153
Physical Review B - Condensed Matter and Materials Physics 92.23 (2015): 235153
ISSN
1098-0121 (print); 1550-235X (online)DOI
10.1103/PhysRevB.92.235153Funded by
This work was supported by the Spanish MINECO (FIS2014-54498-R, MAT2011-27470-C02-02, and CSD-2009-00013), by the European Union (Graphene Flagship Contract No. CNECT-ICT-604391 and COST MP1201 action), and by the Comunidad de Madrid through programs Nanofrontmag-CM (S2013/MIT-2850) and MAD2D-CM (S2013/MIT-3007).We acknowledge MINECO and CSIC for financial support and for provision of synchrotron radiation facilities and would like to thank the SpLine BM25 staff for assistance in using the beamlineProject
Gobierno de España. FIS2014-54498-R; Gobierno de España. MAT2011-27470- C02-02; Gobierno de España. CSD-2009-00013; Comunidad de Madrid. S2013/MIT-2850/NANOFRONTMAG-CMEditor's Version
http://dx.doi.org/10.1103/PhysRevB.92.235153Subjects
Layered La1−xCexSb2; Anisotropic metals; Distortion; Magnetic field; FísicaRights
©2015 American Physical SocietyAbstract
The layered rare-earth diantimonides RSb2 are anisotropic metals with generally low electronic densities whose properties can be modified by substituting the rare earth. LaSb2 is a nonmagnetic metal with a low residual resistivity presenting a low-temperature magnetoresistance that does not saturate with the magnetic field. It has been proposed that the latter can be associated to a charge density wave (CDW), but no CDW has yet been found. Here we find a kink in the resistivity above room temperature in LaSb2 (at 355 K) and show that the
kink becomes much more pronounced with substitution of La by Ce along the La1−xCexSb2 series. We find signatures of a CDW in x-ray scattering, specific heat, and scanning tunneling microscopy (STM) experiments in particular for x ≈ 0.5. We observe a distortion of rare-earth–Sb bonds lying in-plane of the tetragonal crystal using x-ray scattering, an anomaly in the specific heat at the same temperature as the kink in resistivity and charge modulations in STM. We conclude that LaSb2 has a CDW which is stabilized in the La1−xCexSb2 series
due to substitutional disorder
Files in this item
Google Scholar:Luccas, R. F.
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Fente, A.
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Hanko, J.
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Correa-Orellana, A.
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Herrera, E.
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Climent-Pascual, E.
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Azpeitia, J.
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Pérez-Castañeda, Tomás
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Osorio, M. R.
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Salas-Colera, E.
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Nemes, N. M.
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Mompeán, Federico J.
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García-Hernández, M.
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Rodrigo Rodríguez, José Gabriel
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Ramos Ruiz, Miguel Ángel
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Guillamón Gómez, Isabel
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Vieira Díaz, Sebastián
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Suderow Rodríguez, Hermann Jesús
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