by Luccas, R. F., Fente, A., Hanko, J., Correa-Orellana, A., Herrera, E., Climent-Pascual, E., Azpeitia, J., Pérez-Castañeda, T., Osorio, M. R., Salas-Colera, E., Nemes, N. M., Mompean, F. J., García-Hernández, M., Rodrigo, J. G., Ramos, M. A., Guillamón, I., Vieira, S. and Suderow, H.
Abstract:
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.
Reference:
Charge density wave in layered ${{textbackslash}mathrm{{La}}}_{1{textbackslash}ensuremath{-}x}{{textbackslash}mathrm{{Ce}}}_{x}{{textbackslash}mathrm{{Sb}}}_{2}$ (Luccas, R. F., Fente, A., Hanko, J., Correa-Orellana, A., Herrera, E., Climent-Pascual, E., Azpeitia, J., Pérez-Castañeda, T., Osorio, M. R., Salas-Colera, E., Nemes, N. M., Mompean, F. J., García-Hernández, M., Rodrigo, J. G., Ramos, M. A., Guillamón, I., Vieira, S. and Suderow, H.), In Physical Review B, volume 92, 2015.
Bibtex Entry:
@article{luccas_charge_2015,
title = {Charge density wave in layered ${{textbackslash}mathrm{{La}}}_{1{textbackslash}ensuremath{-}x}{{textbackslash}mathrm{{Ce}}}_{x}{{textbackslash}mathrm{{Sb}}}_{2}$},
volume = {92},
url = {https://link.aps.org/doi/10.1103/PhysRevB.92.235153},
doi = {10.1103/PhysRevB.92.235153},
abstract = {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.},
number = {23},
urldate = {2021-07-13},
journal = {Physical Review B},
author = {Luccas, R. F. and Fente, A. and Hanko, J. and Correa-Orellana, A. and Herrera, E. and Climent-Pascual, E. and Azpeitia, J. and Pérez-Castañeda, T. and Osorio, M. R. and Salas-Colera, E. and Nemes, N. M. and Mompean, F. J. and García-Hernández, M. and Rodrigo, J. G. and Ramos, M. A. and Guillamón, I. and Vieira, S. and Suderow, H.},
month = dec,
year = {2015},
note = {No CMAM},
pages = {235153},
file = {APS Snapshot:E:\Usuarios\Administrator\Zotero\storage\5AWIZSLD\PhysRevB.92.html:text/html;Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\WUL7T378\Luccas et al. - 2015 - Charge density wave in layered $ mathrm La _ 1e.pdf:application/pdf},
}