Resonant modes in strain-induced graphene superlattices

Pellegrino, Francesco; Angilella, G. G. N.; Pucci, R.

doi:10.1103/physrevb.85.195409

Cited by 39 publications

(16 citation statements)

References 30 publications

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“…[93,94] based on discrete differential geometry can also be used to compute higher order corrections. The tight binding model with space-dependent velocity has also been used to study bound states in strain superlattices [95] and to study the modulation of persistent currents in graphene rings [96]. The possibility of tuning the strain to get a given velocity profile has been suggested in [97].…”

Section: Quantum Field Theory In Curved Spacesmentioning

confidence: 99%

Novel effects of strains in graphene and other two dimensional materials

Amorim¹,

Cortijo²,

Juan³

et al. 2016

Physics Reports

385

401

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√s NN = 5.02 TeV using the ALICE detector at the LHC. The measurement covers the p T interval 0.5 < p T < 12 GeV/c and the rapidity range −1.065 < y cms < 0.135 in the centre-of-mass reference frame. The contribution of electrons from background sources was subtracted using an invariant mass approach. The nuclear modification factor R pPb was calculated by comparing the p T -differential invariant cross section in p-Pb collisions to a pp reference at the same centre-of-mass energy, which was obtained by interpolating measurements at √ s = 2.76 TeV and √ s = 7 TeV. The R pPb is consistent with unity within uncertainties of about 25%, which become larger for p T below 1 GeV/c. The measurement shows that heavy-flavour production is consistent with binary scaling, so that a suppression in the high-p T yield in Pb-Pb collisions has to be attributed to effects induced by the hot medium produced in the final state. The data in p-Pb collisions are described by recent model calculations that include cold nuclear matter effects. IntroductionThe Quark-Gluon Plasma (QGP) [1,2], a colour-deconfined state of strongly-interacting matter, is predicted to exist at high temperature according to lattice Quantum Chromodynamics (QCD) calculations [3]. These conditions can be reached in ultra-relativistic heavy-ion collisions [4][5][6][7][8][9][10]. Charm and beauty (heavy-flavour) quarks are mostly produced in initial hard scattering processes on a very short time scale, shorter than the formation time of the QGP medium [11], and thus experience the full temporal and spatial evolution of the collision. While interacting with the QGP medium, heavy quarks lose energy via elastic and radiative processes [12][13][14]. Heavy-flavour hadrons are therefore well-suited probes to study the properties of the QGP. The effect of energy loss on heavy-flavour production can be characterised via the nuclear modification factor (R AA ) of heavy-flavour hadrons. The R AA is defined as the ratio of the heavy-flavour hadron yield in nucleusnucleus (A-A) collisions to that in proton-proton (pp) collisions scaled by the average number of binary nucleon-nucleon collisions. The R AA is studied differentially as a function of transverse momentum (p T ), rapidity ( y) and collision centrality. It was measured at the Relativistic Heavy Ion Collider (RHIC) [15][16][17][18] and at the Large Hadron Collider (LHC) [19][20][21][22]. At RHIC, in central The interpretation of the measurements in A-A collisions requires the study of heavy-flavour production in p-A collisions, which provides access to cold nuclear matter (CNM) effects. These effects are not related to the formation of a colour-deconfined medium, but are present in case of colliding nuclei (or protonnucleus). An important CNM effect in the initial state is partondensity shadowing or saturation, which can be described using modified parton distribution functions (PDF) in the nucleus [23] or using the Color Glass Condensate (CGC) effective theory [24]. Further CNM effects include energy loss [25] in...

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Section: Quantum Field Theory In Curved Spacesmentioning

confidence: 99%

Novel effects of strains in graphene and other two dimensional materials

Amorim¹,

Cortijo²,

Juan³

et al. 2016

Physics Reports

385

401

View full text Add to dashboard Cite

show abstract

“…Finally, we note that superlattice perturbations for Dirac electrons have been discussed in a variety of different contexts, some of which pre‐date the realisation of the graphene/hBN heterostructure. Many theoretical works have investigated the influence of one or two‐dimensional electrostatic potentials on graphene electrons , with the former situation realisable using patterned gates . Magnetic and pseudo‐magnetic field superlattices (the latter arising from periodically strained graphene) have also been extensively studied , with steps towards experimental realisation .…”

Section: Introductionmentioning

confidence: 99%

Moiré superlattice effects in graphene/boron‐nitride van der Waals heterostructures

et al. 2015

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“…8 For the strain-induced graphene 1D channels, i.e., the quantum waveguide, the bound states and the surface modes occur and play the important role of guided mode on guiding the electrons inside the channel. 8,58,59 In addition, the different directional strains lead to different effects on the guided mode and the strain-tunable bound states are verified by the photonassisted tunneling, 59 where an oscillating potential or a laser is used to supply the photon. [60][61][62][63][64][65][66][67][68][69][70][71] A profile of periodic local uniaxial strains or corrugated deformation in graphene can remarkably affect the energy structure, electronic transmission and shot noise by the strain-induced vector potential, scalar potential and renormalized group velocity.…”

Section: Strain-manipulated Electronic Transports In Graphene Nanostrmentioning

confidence: 99%

“…43,44 In the presence of a bipolar PN junction fabricated by a combination of top/bottom electrostatic gates, 46-48 the carriers exhibit electronic negative refractive due to the interband scattering, 49 which attracts considerable attention on the analogous light phenomenon of electrons in graphene-based nanostructure. [50][51][52][53][54][55][56][57][58][59] Alternatively, the strain opens an exotic way to tailor the electronic transport in a strain-engineering fashion, where the electronic confinement, collimation and scattering can be achieved by designing an expected substrate-induced local strain profile. 8 For the strain-induced graphene 1D channels, i.e., the quantum waveguide, the bound states and the surface modes occur and play the important role of guided mode on guiding the electrons inside the channel.…”

Section: Strain-manipulated Electronic Transports In Graphene Nanostrmentioning

confidence: 99%

Generalized Hamiltonian for a graphene subjected to arbitrary in-plane strains

Wang

Liu

2015

Funct. Mater. Lett.

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The interplay between the linear elastic deformation up to 20% and the unique electronic properties of graphene nanostructures offers an attractive prospect to manipulate their properties by strain. Here we review the recent progress on the electronic response of graphene to the in-plane strains, including the strain-modulated electronic structure and the strain-modulated spin, valley and superconducting transports. A generalized Hamiltonian for a graphene was constructed subjected to arbitrary in-plane strains. The Hamiltonian is helpful to design and optimize the graphene-based nano-electromechanical systems (NEMS).

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Resonant modes in strain-induced graphene superlattices

Cited by 39 publications

References 30 publications

Novel effects of strains in graphene and other two dimensional materials

Novel effects of strains in graphene and other two dimensional materials

Moiré superlattice effects in graphene/boron‐nitride van der Waals heterostructures

Generalized Hamiltonian for a graphene subjected to arbitrary in-plane strains

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