2011年7月
Electronic Orders Induced by Kondo Effect in Non-Kramers f-Electron Systems
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 80
- 号
- Supplement A
- 開始ページ
- SA018
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJS.80SA.SA018
- 出版者・発行元
- PHYSICAL SOC JAPAN
This paper clarifies the microscopic nature of the staggered scalar order, which is specific to even number off electrons per site. In such systems, crystalline electric field (CEF) can make a singlet ground state. As exchange interaction with conduction electrons increases, the CEF singlet at each site gives way to Kondo singlets. The collective Kondo singlets are identified with itinerant states that form energy bands. Near the boundary of itinerant and localized states, a new type of electronic order appears with staggered Kondo and CEF singlets. We present a phenomenological three-state model that qualitatively reproduces the characteristic phase diagram, which have been obtained numerically with use of the continuous-time quantum Monte Carlo combined with the dynamical mean-field theory. The scalar order observed in PrFe4P12 is ascribed to this staggered order accompanying charge density wave (CDW) of conduction electrons. Accurate photoemission and tunneling spectroscopy should be able to probe sharp peaks both below and above the Fermi level in the ordered phase.
- リンク情報
- ID情報
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- DOI : 10.1143/JPSJS.80SA.SA018
- ISSN : 0031-9015
- Web of Science ID : WOS:000208728400018