Quantum and Thermal Dispersion Forces: Application to Graphene Nanoribbons

Drosdoff, D.; Woods, Lilia M.

doi:10.1103/physrevlett.112.025501

Cited by 19 publications

(15 citation statements)

References 28 publications

(36 reference statements)

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“…A key point here is the fact that the van der Waals-Casimir force in many nanostructures, including graphene systems, is much reduced as compared to bulk counterparts due to characteristic suppressions of the relevant plasma excitations [19,20,22]. Thus, controlling the properties of the graphene nanostructures and connecting wire provides an excellent opportunity for potentially observing the charge-induced fluctuation interaction.…”

Section: Resultsmentioning

confidence: 99%

“…While the Casimir phenomenon is due to the electromagnetic fluctuation excitations associated with the dielectric and magnetic response of each plate, the charge-induced effect is due to monopolar charge fluctuations between the plates transferred through the wire. Since in many cases nanostructures are characterized by a reduced Casimir force as compared to 3D [19][20][21][22], nanocapacitors offer the possibility of finding regimes where the charge-induced fluctuation interaction can be dominant.…”

Section: Introductionmentioning

confidence: 99%

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Charge-Induced Fluctuation Forces in Graphitic Nanostructures

et al. 2016

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Charge fluctuations in nanocircuits with capacitor components are shown to give rise to a novel type of long-ranged interaction, which coexist with the regular Casimir-van der Waals force. The developed theory distinguishes between thermal and quantum mechanical effects, and it is applied to capacitors involving graphene nanostructures. The charge fluctuations mechanism is captured via the capacitance of the system with geometrical and quantum mechanical components. The dependence on the distance separation, temperature, size, and response properties of the system shows that this type of force can have a comparable and even dominant effect to the Casimir interaction. Our results strongly indicate that fluctuation-induced interactions due to various thermodynamic quantities can have important thermal and quantum mechanical contributions at the microscale and the nanoscale.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Charge-Induced Fluctuation Forces in Graphitic Nanostructures

et al. 2016

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“…Recent experimental setups and computational capabilities are able to consider complex geometries beyond simple planar configurations [9][10][11][12][13][14][15][16][17][18][19][20], two-dimensional (2D) materials [21][22][23][24][25][26], and effects of thermal fluctuations [27][28][29][30][31][32]. Nevertheless, the basic mechanism of these different Casimir interactions is the same, a dispersion force induced by quantum and thermal fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Tunable Stable Levitation Based on Casimir Interaction between Nanostructures

Liu

Zhang

2016

Phys. Rev. Applied

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Quantum levitation enabled by repulsive Casimir force has been a desire due to the potential exciting applications in passive-suspension devices and frictionless bearings. In this paper, dynamically tunable stable levitation is theoretically demonstrated based on the configuration of dissimilar gratings separated by an intervening fluid using exact scattering theory. The levitation position is insensitive to temperature variations and can be actively tuned by adjusting the lateral displacement between the two gratings. This work paves a way toward applying quantum Casimir interactions into macroscopic mechanical devices working in a noncontact and low-friction environment for controlling the position or transducing lateral movement into vertical displacement at the nanoscale., where d is the gap spacing, h is reduced Planck constant, c is the speed of light in vacuum [1]. Its magnitude increases quickly with decreasing gap spacing, and the corresponding pressure exerted is even larger than atmospheric pressure at d = 10 nm.This nontrivial long-range interaction will cause the malfunctioning of microelectromechanical systems (MEMS) and nanoelectromechanical systems (NEMS) due to the induced stiction and friction problems. As a result, it may impede on Moore's law, which says that the packing density of transistors doubles approximately every two years.The desire of overcoming the Casimir stiction has been one of the major driving forces for realizing repulsive force. Magnetic materials were introduced to achieve the Casimir

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“…The proposed device geometry is, in addition to studies of Coulomb drag, highly relevant to other studies of coupled one-dimensional (1D) structures based on graphene. For example, the propagation of plasmons 21,22 , or the effect of a van der Waals interaction 23 have been investigated recently both theoretically and experimentally in similar systems.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the propagation of plasmons [21,22], or the effect of a van der Waals interaction [23], have been investigated recently both theoretically and experimentally in similar systems.…”

Section: Introductionmentioning

confidence: 99%

Plasmon-mediated Coulomb drag between graphene waveguides

Shylau

Jauho

2014

Phys. Rev. B

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We analyze theoretically charge transport in Coulomb coupled graphene waveguides (GWGs). The GWGs are defined using antidot lattices, and the lateral geometry bypasses many technological challenges of earlier designs. The drag resistivity ρD, which is a measure of the many-particle interactions between the GWGs, is computed for a range of temperatures and waveguide separations. It is demonstrated that for T > 0.1TF the drag is significantly enhanced due to plasmons, and that in the low-temperature regime a complicated behavior may occur. In the weak coupling regime the dependence of drag on the interwaveguide separation d follows ρD ∼ d −n , where n ≃ 6.

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Quantum and Thermal Dispersion Forces: Application to Graphene Nanoribbons

Cited by 19 publications

References 28 publications

Charge-Induced Fluctuation Forces in Graphitic Nanostructures

Charge-Induced Fluctuation Forces in Graphitic Nanostructures

Tunable Stable Levitation Based on Casimir Interaction between Nanostructures

Plasmon-mediated Coulomb drag between graphene waveguides

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