Adsorption-induced magnetic properties and metallic behavior of graphene

Journal Article · Mon Sep 21 00:00:00 EDT 2009 · Applied Physics Letters, 95(12):Article: 123119

DOI:https://doi.org/10.1063/1.3236783· OSTI ID:967212

Zhou, Yungang; Zu, Xiaotao T; Gao, Fei; Lv, H F; Xiao, Haiyan J

Magnetic properties and electronic structures of graphene with Cl, S, and P adsorption have been investigated using ab initio calculations. The adsorption of Cl leads to Fermi level shifting to valence band, which results in metallic graphene. A band gap of 0.6 eV emerges in a S-absorbed graphene, leading to the semiconducting graphene. The unpaired electrons in the absorbed P atom is polarized and thus, exhibits a magnetic moment of 0.86 μB, while no magnetic moment has been observed after Cl and S adsorption. This demonstrates that the magnetic properties and conductive behavior of graphene can be modified via atom adsorption. Specially, P-absorbed graphene may be useful for spintronic applications, such as tunneling magnetoresistance.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 967212
• Report Number(s): PNNL-SA-68414; APPLAB; KC0201020; TRN: US200923%%187
• Journal Information: Applied Physics Letters, 95(12):Article: 123119, Vol. 95, Issue 12; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBONACEOUS MATERIALS
SORPTIVE PROPERTIES
MAGNETIC PROPERTIES
ADSORPTION
ELECTRONIC STRUCTURE
CHLORINE
SULFUR
PHOSPHORUS
ENERGY GAP
ELECTRIC CONDUCTIVITY
FERMI LEVEL
MAGNETIC MOMENTS
MAGNETORESISTANCE
VALENCE
Magnetic properties
Graphene
Metallic behavior