Emergence of Kondo Resonance in Graphene Intercalated with Cerium
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, EF, hybridized with the graphene π-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. These results provide a novel insight how Kondo physics emerges in the sea of two-dimensional Dirac electrons.
- Authors:
-
- Pusan National Univ., Busan (Korea, Republic of). Dept. of Physics
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Max Planck-POSTECH/Hsinchu Center for Complex Phase Materials
- Pusan National Univ., Busan (Korea, Republic of). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Center for Spintronics
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Dept. of Physics
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Max Planck-POSTECH/Hsinchu Center for Complex Phase Materials and Dept. of Physics
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Pohang Accelerator Lab.
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Physics
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Dept. of Physics; Gwangju Inst. of Science and Technology (Korea, Republic of). Dept. of Physics and Photon Science
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Research Foundation of Korea (NRF)
- OSTI Identifier:
- 1465459
- Grant/Contract Number:
- AC02-05CH11231; 2015R1C1A1A01053065; 2017K1A3A7A09016384; 2018R1A2B6004538; 2016K1A4A4A01922028; 2016R1D1A1B02008461; NRF-2017M2A2A6A01071297; 2017R1A2B4005175; NRF-2015R1A5A1009962
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 18; Journal Issue: 6; Related Information: Copyright © 2018 American Chemical Society.; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; angle-resolved photoemission; cerium; graphene; Kondo effect
Citation Formats
Hwang, Jinwoong, Kim, Kyoo, Ryu, Hyejin, Kim, Jingul, Lee, Ji-Eun, Kim, Sooran, Kang, Minhee, Park, Byeong-Gyu, Lanzara, Alessandra, Chung, Jinwook, Mo, Sung-Kwan, Denlinger, Jonathan, Min, Byung Il, and Hwang, Choongyu. Emergence of Kondo Resonance in Graphene Intercalated with Cerium. United States: N. p., 2018.
Web. doi:10.1021/acs.nanolett.8b00784.
Hwang, Jinwoong, Kim, Kyoo, Ryu, Hyejin, Kim, Jingul, Lee, Ji-Eun, Kim, Sooran, Kang, Minhee, Park, Byeong-Gyu, Lanzara, Alessandra, Chung, Jinwook, Mo, Sung-Kwan, Denlinger, Jonathan, Min, Byung Il, & Hwang, Choongyu. Emergence of Kondo Resonance in Graphene Intercalated with Cerium. United States. https://doi.org/10.1021/acs.nanolett.8b00784
Hwang, Jinwoong, Kim, Kyoo, Ryu, Hyejin, Kim, Jingul, Lee, Ji-Eun, Kim, Sooran, Kang, Minhee, Park, Byeong-Gyu, Lanzara, Alessandra, Chung, Jinwook, Mo, Sung-Kwan, Denlinger, Jonathan, Min, Byung Il, and Hwang, Choongyu. Tue .
"Emergence of Kondo Resonance in Graphene Intercalated with Cerium". United States. https://doi.org/10.1021/acs.nanolett.8b00784. https://www.osti.gov/servlets/purl/1465459.
@article{osti_1465459,
title = {Emergence of Kondo Resonance in Graphene Intercalated with Cerium},
author = {Hwang, Jinwoong and Kim, Kyoo and Ryu, Hyejin and Kim, Jingul and Lee, Ji-Eun and Kim, Sooran and Kang, Minhee and Park, Byeong-Gyu and Lanzara, Alessandra and Chung, Jinwook and Mo, Sung-Kwan and Denlinger, Jonathan and Min, Byung Il and Hwang, Choongyu},
abstractNote = {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, EF, hybridized with the graphene π-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. These results provide a novel insight how Kondo physics emerges in the sea of two-dimensional Dirac electrons.},
doi = {10.1021/acs.nanolett.8b00784},
journal = {Nano Letters},
number = 6,
volume = 18,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2018},
month = {Tue May 15 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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