2002/12/12 by Dennis P. Clougherty · 1 citation
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Carbon Nanotubes in Composites #Graphene research and applications #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.90.035507
published as Phys. Rev. Lett. 90, 035507 (2003) · 4 pages, 2 figures
arxiv created 2002/12/12 · openalex publication_date 2003/01/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A generalization of the Anderson model that includes pseudo-Jahn-Teller impurity coupling is proposed to describe distortions of an endohedral impurity in a carbon nanotube. Within mean-field theory, spontaneous axial symmetry breaking is found when the vibronic coupling strength g exceeds a critical value. The effective potential is found to have O(2) symmetry, in agreement with numerical calculations. For metallic zigzag nanotubes endohedrally doped with transition metals in the dilute limit, the low-energy properties of the system may display two-channel Kondo behavior; however, strong vibronic coupling is seen to exponentially suppress the Kondo energy scale.