Intrinsic plasmarons in warm graphene. (12th September 2017)

• Record Type: Journal Article
• Authors: Liu, Daqing; Chen, Shuyue; Zhang, Shengli; Ma, Ning
• Is Part Of: Journal of physics. Volume 29:Number 42(2017)
• Publication Date: 2017-09-12
• Subjects: intrinsic plasmaron -- graphene -- Landau damping; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa81ad
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Based on a self-consistent method, we predict theoretically that there exist intrinsic plasmarons in graphene at nonzero temperature, with a well defined mode, as shown by the result of Landau damping. We find that there are sharp differences between the discussed system and the QCD/QED system. Firstly, the thermal mass is proportional to α g 3 / 4 T but not α g T . Secondly, at 0 < q < q c, the fermion channel and plasmaron channel are nearly degenerate, and furthermore the energy difference between fermion and plasmaron becomes larger and larger with increasing q in the region q > q c . Thirdly, the fermion behaves as a 'relativistic particle' with nonzero mass, and the plasmaron exhibits an abnormal dispersion at moderate momentum.