Coulomb decay rates in monolayer doped graphene

Chiu, Chi-Tsung; Chung, Yue Lin; Yang, Cheng Hsueh; Liu, Chang Ting; Lin, Chiun-Yan

doi:10.1039/c9ra05953a

RSC Adv.

2020

DOI: 10.1039/c9ra05953a

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Coulomb decay rates in monolayer doped graphene

Chi-Tsung Chiu

Yue Lin Chung

Cheng Hsueh Yang

et al.

Abstract: Excited conduction electrons, conduction holes, and valence holes in monolayer electron-doped graphene exhibit unusual Coulomb decay rates.

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Cited by 3 publications

References 62 publications

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Plasmon Dynamics in Electron‐Doped Graphene and AA‐ versus AB‐Stacked Bilayer Graphene

Liu,

Lin,

Chiu

2024

Physica Status Solidi (b)

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This study investigates low‐frequency plasmons and single‐particle excitations (SPEs) in monolayer and bilayer graphene with various stacking configurations. The dynamics of wave propagation under different time‐dependent perturbation scenarios are elucidated using the random‐phase approximation dielectric function and tight‐binding Hamiltonian. The modulation of coherent excitations, particularly affecting plasmon waves, provides insights into the spatial and temporal dynamics on graphene sheets. A 2D acoustic plasmon mode is observed in monolayer graphene under extrinsic doping effects, while in bilayer graphene, it is accompanied by higher frequency optical plasmons. The predicted dynamic behavior, indicative of plasmon resonance, SPEs, and Landau damping with respect to stacking and doping effects, can be detected through ultrafast coherent dynamics observed via nanoimaging and nanospectroscopy techniques.

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Plasmon Dynamics in Electron‐Doped Graphene and AA‐ versus AB‐Stacked Bilayer Graphene

Liu,

Lin,

Chiu

2024

Physica Status Solidi (b)

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show abstract

Direct correlation between electronic and optical properties of the XC monolayers (X= Si, Ge, and Sn) from first-principles calculations

Thi Han,

Le Manh,

Khuong Dien

2024

Physica E: Low-dimensional Systems and Nanostructures

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Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals

Marušić

Kalinić

Radović

et al. 2022

IJMS

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Graphene doped by alkali atoms (ACx) supports two heavily populated bands (π and σ) crossing the Fermi level, which enables the formation of two intense two-dimensional plasmons: the Dirac plasmon (DP) and the acoustic plasmon (AP). Although the mechanism of the formation of these plasmons in electrostatically biased graphene or at noble metal surfaces is well known, the mechanism of their formation in alkali-doped graphenes is still not completely understood. We shall demonstrate that two isoelectronic systems, KC8 and CsC8, support substantially different plasmonic spectra: the KC8 supports a sharp DP and a well-defined AP, while the CsC8 supports a broad DP and does not support an AP at all. We shall demonstrate that the AP in an ACx is not, as previously believed, just a consequence of the interplay of the π and σ intraband transitions, but a very subtle interplay between these transitions and the background screening, caused by the out-of-plane interband C(π)→A(σ) transitions.

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Coulomb decay rates in monolayer doped graphene

Abstract: Excited conduction electrons, conduction holes, and valence holes in monolayer electron-doped graphene exhibit unusual Coulomb decay rates.

Cited by 3 publications

References 62 publications

Plasmon Dynamics in Electron‐Doped Graphene and AA‐ versus AB‐Stacked Bilayer Graphene

Plasmon Dynamics in Electron‐Doped Graphene and AA‐ versus AB‐Stacked Bilayer Graphene

Direct correlation between electronic and optical properties of the XC monolayers (X= Si, Ge, and Sn) from first-principles calculations

Resolving the Mechanism of Acoustic Plasmon Instability in Graphene Doped by Alkali Metals

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