Emergence of Kondo Resonance in Graphene Intercalated with Cerium

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

doi:10.1021/acs.nanolett.8b00784

Title: Emergence of Kondo Resonance in Graphene Intercalated with Cerium

Journal Article · Tue May 15 00:00:00 EDT 2018 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.8b00784· OSTI ID:1465459

Hwang, Jinwoong ^[1]; Kim, Kyoo ^[2];

^[3]; Kim, Jingul ^[4]; Lee, Ji-Eun ^[1]; Kim, Sooran ^[5]; Kang, Minhee ^[1]; Park, Byeong-Gyu ^[6]; Lanzara, Alessandra ^[7]; Chung, Jinwook ^[8];

^[9]; Denlinger, Jonathan ^[9]; Min, Byung Il ^[4];

^[1]

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)

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 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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Research Foundation of Korea (NRF)

Grant/Contract Number:: AC02-05CH11231; 2015R1C1A1A01053065; 2017K1A3A7A09016384; 2018R1A2B6004538; 2016K1A4A4A01922028; 2016R1D1A1B02008461; NRF-2017M2A2A6A01071297; 2017R1A2B4005175; NRF-2015R1A5A1009962

OSTI ID:: 1465459

Journal Information:: Nano Letters, Vol. 18, Issue 6; Related Information: Copyright © 2018 American Chemical Society.; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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