Temperature Effect on the First Excited State Energy and Average Phonon Number of Bound Magnetopolarons in Monolayer Graphene

Ding, Zhao-Hua; Gen, Yan-Bo; Jia, Caihong; Xiao, Jing‐Lin

doi:10.1007/s11664-019-07294-4

Cited by 1 publication

(2 citation statements)

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“…One notable difference is the apparent levelling off of ground-state energy once a threshold cutoff wavenumber is reached. e magnetic field can cause the splitting degree of ground-state energy, which is consistent with the results of references [5,18,20,21]. We also calculated the effect of substrate material on the ground-state energy of graphene polaron.…”

Section: Resultssupporting

confidence: 89%

“…Xiao et al [14][15][16] discussed the effects of Coulomb impurities and polar substrates on the splitting of polaron zero-Landau level in graphene. Wang et al [17][18][19][20][21] used the LLP unitary transformation to analyse the effect of impurities on monolayer graphene's physical properties. Additionally, they calculated the effect of polarons in MG on different substrates, thereby highlighting MG's sensitivity to its local environment.…”

Section: Introductionmentioning

confidence: 99%

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Graphene-Substrate Effects on Characteristics of Weak-Coupling Bound Magnetopolaron

Ding

Geng

Zhao

et al. 2020

Advances in Condensed Matter Physics

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Graphene has many unique properties which have made it a hotbed of scientific research in recent years. However, it is not expected intuitively that the strong effects of the substrate and Coulomb doping in the center of crystal cell on the polaron in monolayer graphene. Here, the interaction energy of surface electron (hole) in the graphene and optical phonons in the substrate, which give rise to weakly coupled polarons, is analyzed in the context of the Coulomb doping. The ground-state energy of the polaron is calculated using the Lee-Low-Pine unitary transformation and linear combination operator method. It is found that the ground-state energy is an increasing function of magnetic field strength, the bound Coulomb potential, and the cutoff wavenumber. Numerical results also reveal that the ground-state energy reduces as the distance between the graphene and the substrate is increased. Moreover, the ground energy level of polaron shows the two (+) and (−) branches and zero-Landau energy (ground) level separation in the graphene-substrate material.

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Section: Resultssupporting

confidence: 89%