The effect of electron- phonon coupling in spin–orbit-coupled graphene

Kandemir, B. S.; Akay, Defne

doi:10.1080/14786435.2017.1328137

Cited by 34 publications

(16 citation statements)

References 30 publications

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“…The scientists received the 2010 Nobel Prize in physics. Since the discovery of the graphene, further researches have been realized on the other 2-dimensional materials because of their extraordinary electronic, optical and chemical properties [2][3][4][5][6][7][8][9]. Main application areas of the 2-dimensional materials are biological engineering, electronics, sensors, optoelectronics, composite materials, medicine, photovoltaic systems and energy storage [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Triangular Potential Effects on the Fermi Velocity Renormalization in 8-Pmmn Borophene

Akay

2019

Journal of Boron

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A novel mechanism has been reported for the intrinsic electronic properties of the 8-Pmmn borophene to investigate the electronic energy spectrum and spectrum parameters of the structure. To examine the structure, we extract the energy spectrum of the Hamiltonian for the monolayer borophene by using analytical method. Additionally, for the intrinsic properties, first we obtained the bare Fermi velocity which findings of the study are consistent with experimental results. After obtained the bare state Fermi velocity 8-Pmmn borophene, dressed with triangular potential and renormalized Fermi velocity has been obtained. Corresponding renormalized Fermi velocity reshaped with the triangular potential which has non-negligible contribution to the intrinsic properties of borophene. This finding has important implications for developing electronic devices which made from the boron due to increasing the controllability of the structure.

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Section: Introductionmentioning

confidence: 99%

Triangular Potential Effects on the Fermi Velocity Renormalization in 8-Pmmn Borophene

Akay

2019

Journal of Boron

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“…As stated in the introduction, by itself, Haldane interaction alone opens a band gap with 2 Δ . Interaction of electrons with the zone boundary phonon leads also to a band gap with 2 Σ in the THz region and lifts the degeneracy of two zero‐gap branches in spin–orbit‐coupled graphene while the valley degeneracy persist . It is analytically shown that Haldane interaction induced by photo‐irradiation breaks the fourfold SU(4) symmetry of spin–orbit‐coupled graphene in the presence of electron– A 1 g phonon interaction.…”

Section: Resultsmentioning

confidence: 93%

Photoinduced Dynamical Band Gap in Graphene: The Effects of Electron–Phonon and Spin–Orbit Interaction

Kandemir

Akay

2018

Physica Status Solidi (b)

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The combined effects of electron-A 1g phonon and Rashba spin-orbit couplings on the electronic spectrum of graphene in the presence of Haldane interaction induced by photo-irradiation have been studied. A Fröhlich-type Hamiltonian has been proposed to model these interactions, and then a diagonalization procedure based on the Lee-Low-Pines (LLP) theory which includes two successive unitary transformations has been applied. The results show that combined effects arising from the Rashba spin-orbit interaction and electron-A 1g phonon interaction in the presence of Haldane interaction remove the valley degeneracy of electronic bands, and thus allow one to tune the resulting band gap just by adjusting the associated strengths of the interactions.

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“…(1) Anharmonic phonon interactions with other particles. In some systems, one should consider not only how phonons interact with other phonons but also with other particles, such as electron-phonon coupling [271,273], spin-phonon coupling [274,275], and phonon-spin-orbit coupling [276,277]. These complicated correlations will jointly induce many novel properties.…”

Section: Discussionmentioning

confidence: 99%

Phonon anharmonicity: a pertinent review of recent progress and perspective

Wei

Sun

et al. 2021

Sci. China Phys. Mech. Astron.

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Anharmonic lattice vibrations play pivotal roles in the thermal dynamics in condense matters and affect how the atoms interact and conduct heat. An in-depth understanding of the microscopic mechanism of phonon anharmonicity in condensed systems is critical for developing better functional and energy materials. In recent years, various novel behaviors in condense matters driven by phonon anharmonic effects were discovered, such as soft mode phase transition, negative thermal expansion (NTE), multiferroicity, ultralow thermal conductivity (κ), high thermal resistance, and high-temperature superconductivity. These properties have endowed anharmonicity with many promising applications and provided remarkable opportunities for developing "Anharmonicity Engineering"-regulating heat transport towards excellent performance in materials. In this work, we review the recent development of studies on phonon anharmonic effect and summarize its origin, mechanism, research methods, and applications. Besides, the remaining challenges, future trends, and prospects of phonon anharmonicity are also discussed.

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The effect of electron- phonon coupling in spin–orbit-coupled graphene

Cited by 34 publications

References 30 publications

Triangular Potential Effects on the Fermi Velocity Renormalization in 8-Pmmn Borophene

Triangular Potential Effects on the Fermi Velocity Renormalization in 8-Pmmn Borophene

Photoinduced Dynamical Band Gap in Graphene: The Effects of Electron–Phonon and Spin–Orbit Interaction

Phonon anharmonicity: a pertinent review of recent progress and perspective

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