Modified Dirac Fermions in the Crystalline Xenon and Graphene Moiré Heterostructure
[5];
- Department of Physics Pusan National University Busan 46241 South Korea
- Korea Atomic Energy Research Institute Daejeon 34057 South Korea
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Center for Complex Phase Materials Max Planck POSTECH/Korea Research Initiative Pohang 37673 South Korea
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Department of Physics Kangwon National University Chuncheon 24341 South Korea
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Physics Pusan National University Busan 46241 South Korea, Quantum Matter Core‐Facility and Department of Physics Pusan National University Busan 46241 South Korea
Abstract The interface between two‐dimensional (2D) crystals often forms a Moiré superstructure that imposes a new periodicity, which is a key element in realizing complex electronic phases as evidenced in twisted bilayer graphene. Acombined angle‐resolved photoemission spectroscopy measurements and first‐principles calculations reveal the formation of a Moiré superstructure between a 2D Dirac semi‐metallic crystal, graphene, and a 2D insulating crystal of noble gas, xenon. Incommensurate diffraction pattern and folded Dirac cones around the Brillouin zone center imply the formation of hexagonal crystalline array of xenon atoms. The velocity of Dirac fermions increases upon the formation of the 2D xenon crystal on top of graphene due to the enhanced dielectric screening by the xenon over‐layer. These findings not only provide a novel method to produce a Moiré superstructure from the adsorption of noble gas on 2D materials, but also to control the physical properties of graphene by the formation of a graphene‐noble gas interface.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- National Research Facilities and Equipment Center (NFEC); National Research Foundation of Korea (NRF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1924123
- Journal Information:
- Advanced Physics Research, Journal Name: Advanced Physics Research Journal Issue: 7 Vol. 2; ISSN 2751-1200
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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