Effects of electron–acoustic phonon interaction in the presence of spin–orbit couplings in graphene

Moğulkoç, A.

doi:10.1016/j.physb.2015.05.029

Cited by 8 publications

(2 citation statements)

References 49 publications

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“…Lattice vibrations play an important role in the dynamics of charge carriers in 2D materials [14][15][16][17][18][19][20][21][22][23][24]. Particularly, optical phonons of polar substrates localized around sample-substrate interface affect the behavior of charge carrier, which depends strongly on the phonon frequencies and polarizability of a substrate [16,21,[25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Polaronic effects in monolayer black phosphorus on polar substrates

Moğulkoç

Руденко³

et al. 2016

Phys. Rev. B

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We investigate the effect of charge carrier interaction with surface optical phonons on the band properties of monolayer black phosphorus induced by polar substrates. We develop an analytical method based on the Lee-Low-Pines theory to calculate the spectrum of Fröhlich type continuum Hamiltonian in the long-wavelength limit. We examine the modification of a band gap and renormalization of effective masses due to the substrate-related polaronic effect. Our results show that an energy gap in supported monolayer black phosphorus is enlarged depending on a particular substrate and the interlayer distance, z. Among the substrate considered, the largest gap broadening at z = 2.5Å is observed for the Al2O3 substrate, which is found to be ∼ 50 meV. Carrier-phonon coupling also renormalizes the effective masses which is more pronounced along the zigzag direction. Anisotropy of the effective masses becomes stronger by the influence of the polaronic effect corresponding to direction-dependent carrier-phonon coupling. We conclude that substrate phonons have a non-negligible effect on the static band properties of monolayer black phosphorus, which may be further exploited in its experimental and theoretical studies.

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Section: Introductionmentioning

confidence: 99%

Polaronic effects in monolayer black phosphorus on polar substrates

Moğulkoç

Руденко³

et al. 2016

Phys. Rev. B

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“…If silicene rests onto the surface of a magnetic insulator substrate, an exchange magnetization (exchange field) can be induced as M = ∆ SO /2. 42,43 ∆ R 0.7 meV is the normalized magnitude of RSOC strength [44][45][46] and is increased based on the Ref. 47, 48.…”

Section: The Effective Hamiltonian Model Green's Functions and Mmentioning

confidence: 99%

Spin magnetic susceptibility of ferromagnetic silicene in the presence of Rashba spin-orbit coupling

2017

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In the current work, the effect of extrinsic Rashba spin-orbit coupling (RSOC) on the electronic band structure (BS) and magnetic susceptibility (MS) of ferromagnetic silicene is investigated in the presence of external perpendicular electric field. The Kane-Mele Hamiltonian and Dirac cone approximation besides the Green’s functions approach have been used to study the MS of the spin-up and spin-down bands. By changing the electric field, energy of the inter-band transitions and MS are tuned. Our findings show that MS could be easily controlled by an external electric field and RSOC. The system shows three phases: Topological insulator (TI), valley-spin polarized metal (VSPM) and band insulator (BI) for various RSOC and electric field strengths. The maximum and minimum value of MS appears in the VSPM and BI regimes, respectively. RSOC leads to the distortion of BS and reduction of the effective mass which in combination with SOC provides some changes like phase transition of VSPM from antiferromagnetic to the paramagnetic phase. Strong RSOC results to the drastic reduction of MS and double peak of the spin-up or spin-down curves at low temperatures.

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Effect of Core Electrons in Defining the Total Energy, Correlation Energy, and Binding Energy of Graphene, Graphite, and Diamond: a First-Principles Study

Akbudak

Ellialtıoğlu

2018

J Supercond Nov Magn

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Effects of electron–acoustic phonon interaction in the presence of spin–orbit couplings in graphene

Cited by 8 publications

References 49 publications

Polaronic effects in monolayer black phosphorus on polar substrates

Polaronic effects in monolayer black phosphorus on polar substrates

Spin magnetic susceptibility of ferromagnetic silicene in the presence of Rashba spin-orbit coupling

Effect of Core Electrons in Defining the Total Energy, Correlation Energy, and Binding Energy of Graphene, Graphite, and Diamond: a First-Principles Study

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