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The absorption of heavily doped graphene in the terahertz (THz) and mid-infrared (MIR) spectral regions is considered taking into account both the elastic scattering due to finite-range disorder and the variations of concentration due to…

材料科学 · 物理学 2015-06-11 F. T. Vasko , V. V. Mitin , V. Ryzhii , T. Otsuji

We numerically study the thermoelectric and thermal transport in trilayer graphene with different stacking orders in the presence of interlayer bias under a strong perpendicular magnetic field. In biased ABA-stacked case, we find that the…

介观与纳米尺度物理 · 物理学 2015-06-05 R. Ma , L. Sheng , M. Liu , D. N. Sheng

Motivated by the recent discoveries of superconductivity in bilayer and trilayer graphene, we theoretically investigate superconductivity and other interaction-driven phases in multilayer graphene stacks. To this end, we study the density…

超导电性 · 物理学 2023-03-06 Areg Ghazaryan , Tobias Holder , Erez Berg , Maksym Serbyn

The transient response of an intrinsic graphene, which is caused by the ultrafast interband transitions, is studied theoretically for the range of pumping correspondent to the saturated absorption regime. Spectral and temporal dependencies…

介观与纳米尺度物理 · 物理学 2015-05-20 F. T. Vasko

The ABC-stacked N-layer-graphene family of two-dimensional electron systems is described at low energies by two remarkably flat bands with Bloch states that have strongly momentum-dependent phase differences between carbon pi-orbital…

材料科学 · 物理学 2010-07-12 Fan Zhang , Bhagawan Sahu , Hongki Min , Allan H. MacDonald

We demonstrate greatly enhanced light absorption by monolayer graphene over a broad spectral range, from visible to near infrared, based on the attenuated total reflection. In the experiment, graphene is sandwiched between two dielectric…

光学 · 物理学 2013-10-01 Wangshi Zhao , Kaifeng Shi , Zhaolin Lu

Trilayer graphene {(TLG)} consists of three layers of graphene arranged in a particular stacking order. In the case of ABC-ABA-ABC stacking, the layers are arranged in an A-B-C sequence, followed by an A-B-A sequence, and again an A-B-C…

介观与纳米尺度物理 · 物理学 2024-05-28 Abderrahim El Mouhafid , Mouhamadou Hassane Saley , Ahmed Jellal

Recent studies have reported emergent ferroelectric behavior in twisted or moir\'e-engineered graphene-based van der Waals heterostructures, yet the microscopic origin of this effect remains under debate. Pristine mono- or few-layer…

Terahertz (THz) anisotropic absorption in graphene could be significantly modified upon applying a static magnetic field on its ultra-fast 2D Dirac electrons. In general, by deriving the generalized Fresnel coefficients for monolayer…

介观与纳米尺度物理 · 物理学 2023-05-03 D. Jahani , O. Akhavan , A. Alidoust Ghatar

Coherence phenomena in four-level atomic system, cyclicly driven by three coherent fields, are investigated thoroughly at zero and weak magnetic fields. Each strongly interacting atomic state is converted to a triplet due to a dynamical…

光学 · 物理学 2016-09-20 F. Ghafoor , R. G. Nazmitdinov

The zero energy modes induced by vacancies in ABC stacked trilayer graphene are investigated. Depending on the position of the vacancy, a new zero energy solution is realised, different from those obtained in multilayer compounds with…

材料科学 · 物理学 2012-08-31 Eduardo V. Castro , M. Pilar López-Sancho , María A. H. Vozmediano

The symmetry group analysis is applied to classify the phonon modes of $N$-stacked graphene layers (NSGL's) with AB- and AA-stacking, particularly their infra-red and Raman properties. The dispersions of various phonon modes are calculated…

材料科学 · 物理学 2008-06-30 Jin-Wu Jiang , Hui Tang , Bing-Shen Wang , Zhao-Bin Su

For the first time, we have observed the obvious triple G peak splitting of ABA stacked trilayer graphene. The G peak splitting can be quantatively understood through the different electron-phonon coupling strength of Ea', Eb' and Ea"…

介观与纳米尺度物理 · 物理学 2012-07-13 S. S. Lin , B. G. Chen , W. Xiong , Y. Yang , L. M. Tong , Y. Xu , J. Luo

The discovery of superconductivity and correlated electronic states in the flat bands of twisted bilayer graphene has raised a lot of excitement. Flat bands also occur in multilayer graphene flakes that present rhombohedral (ABC) stacking…

介观与纳米尺度物理 · 物理学 2020-08-26 Jean Paul Nery , Matteo Calandra , Francesco Mauri

Graphene flakes are prepared on freshly cleaved mica by exfoliation and studied by scanning tunneling microscopy in ultra high vacuum. On few-layer graphene, a triangular network of partial dislocations separating ABC stacked and ABA…

介观与纳米尺度物理 · 物理学 2013-03-12 Silke Hattendorf , Alexander Georgi , Marcus Liebmann , Markus Morgenstern

A systematic review is made for the AA-, AB- and ABC-stacked graphites. The generalized tight-binding model, accompanied with the effective-mass approximation and the Kubo formula, is developed to investigate electronic and optical…

介观与纳米尺度物理 · 物理学 2017-05-09 Chiun-Yan Lin , Rong-Bin Chen , Yen-Hung Ho , Ming-Fa Lin

We developed the generalized tight-binding model to study the magneto-electronic properties of AAB-stacked trilayer graphene. Three groups of Landau levels (LLs) are characterized by the dominating subenvelope function on distinct…

材料科学 · 物理学 2015-04-02 Thi-Nga Do , Chiun-Yan Lin , Yi-Ping Lin , Po-Hsin Shih , Ming-Fa Lin

The unique terahertz properties of graphene has been identified for novel optoelectronic applications. In a graphene sample with bias voltage added, there is an enhanced absorption in the far infrared region and a diminished absorption in…

介观与纳米尺度物理 · 物理学 2017-05-18 Yuan Yang , Grigory Kolesov , Lucas Kocia , Eric J. Heller

We theoretically study absorption by an undoped graphene layer decorated with arrays of small particles. We discuss periodic and random arrays within a common formalism, which predicts a maximum absorption of $50\%$ for suspended graphene…

介观与纳米尺度物理 · 物理学 2014-02-24 T. Stauber , G. Gómez-Santos , F. Javier García de Abajo

We calculated the optical properties of an $N$-layer graphene by formulating the dynamical conductivity of each layer. This is the conductivity when an electromagnetic field is localized at a particular layer and differs from the standard…

材料科学 · 物理学 2020-08-25 Ken-ichi Sasaki