Symmetry-Driven Novel Kondo Effect in a Molecule

Emi Minamitani, Noriyuki Tsukahara, Daisuke Matsunaka, Yousoo Kim, Noriaki Takagi, and Maki Kawai
Phys. Rev. Lett. 109, 086602 – Published 22 August 2012
PDFHTMLExport Citation

Abstract

The Kondo effect caused by the adsorption of iron phthalocyanine (FePc) on Au(111) was investigated by the combination of density functional theory and a numerical renormalization group calculation with scanning tunneling microscopy. We found that a novel Kondo effect is realized for a single FePc molecule on Au(111) by tuning the symmetry of the ligand field through the local coordination to the substrate. For FePc in the on top configuration where fourfold symmetry around the Fe2+ ion is held, the orbital degrees of freedom survive, resulting in the spin+orbital SU(4) Kondo effect. In contrast, the reduced symmetry in the bridge configuration freezes the orbital degrees of freedom, leading to the spin SU(2) Kondo effect. These results provide a novel example to manipulate the many-body phenomena by tuning the local symmetry.

  • Figure
  • Figure
  • Figure
  • Received 7 May 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.086602

© 2012 American Physical Society

Authors & Affiliations

Emi Minamitani1, Noriyuki Tsukahara2, Daisuke Matsunaka3, Yousoo Kim1, Noriaki Takagi2,*, and Maki Kawai2

  • 1RIKEN, 2-1 Hirosawa, Saitama 351-0198, Japan
  • 2Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
  • 3Department of Mechanical Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan

  • *n-takagi@k.u-tokyo.ac.jp

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 109, Iss. 8 — 24 August 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×