Emergence of Kondo Resonance in Graphene Intercalated with Cerium
SCIE
SCOPUS
- Title
- Emergence of Kondo Resonance in Graphene Intercalated with Cerium
- Authors
- Hwang, Jinwoong; Kim, Kyoo; Ryu, Hyejin; Kim, Jigul; Lee, Ji-Eun; Kim, Sooran; Kang, Minhee; Park, Byeong-Gyu; Lanzara, Alessandra; Chung, Jinwook; Mo, Sung-Kwan; Denlinger, Jonathan; Il Min, Byung; Hwang, Choongyu
- Date Issued
- 2018-06
- Publisher
- AMER CHEMICAL SOC
- Abstract
- The interaction between a magnetic impurity, such as cerium (Ce) atom, and surrounding electrons has been one of the core problems in understanding many-body interaction in solid and its relation to magnetism. Kondo effect, the formation of a new resonant ground state with quenched magnetic moment, provides a general framework to describe many-body interaction in the presence of magnetic impurity. In this Letter, a combined study of angle-resolved photoemission (ARPES) and dynamic mean-field theory (DMFT) on Ce-intercalated graphene shows that Ce-induced localized states near Fermi energy, E-F, hybridized with the graphene g-band, exhibit gradual increase in spectral weight upon decreasing temperature. The observed temperature dependence follows the expectations from the Kondo picture in the weak coupling limit. Our results provide a novel insight how Kondo physics emerges in the sea of two-dimensional Dirac electrons.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95874
- DOI
- 10.1021/acs.nanolett.8b00784
- ISSN
- 1530-6984
- Article Type
- Article
- Citation
- NANO LETTERS, vol. 18, no. 6, page. 3661 - 3666, 2018-06
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