Templating rare-earth hybridization via ultrahigh vacuum annealing of ErCl3 nanowires inside carbon nanotubes

Autor(en)

Paola Ayala, Ryo Kitaura, Ryo Nakanishi, Hidetsugu Shiozawa, Daisuke Ogawa, Patrick Hoffmann, Hinsanori N. Shinohara, Thomas Pichler

Abstrakt

Here we report on controlling the effective hybridization and charge transfer of rare-earth elements inside a carbon nanotube (CNT) nanoreactor. The tubular space inside CNTs can encapsulate one-dimensional (1D) crystals such as ErCl3, which we have used as a starting material. Applying a thermochemical reaction in ultrahigh vacuum, we obtain elemental Er nanowires still encapsulated in the CNTs. The hybridization degree and the effective charge changes were directly accessed across the Er 4d and 3d edges by high-energy spectroscopy. It was found that Er is trivalent but the effective valence is reduced for the Er-filled tube, which strongly suggests an increased hybridization between the nanotube pi states and the Er 5d orbitals. This was also evidenced by the conduction band response determined in C1s-x-ray absorption spectroscopy (XAS). These results have significant implications for the 1D electronic and magnetic properties of these and similar rare-earth nanowire hybrids.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Nagoya University, University of Surrey, Helmholtz-Zentrum Berlin für Materialien und Energie

Journal

Physical Review B

Band

83

Anzahl der Seiten

6

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.83.085407

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/c17d5d3e-0c7d-4dbf-8542-4ae2ad9578bd