Dependences of the van der Waals atom-wall interaction on atomic and material properties

Caride, A. O.; Mostepanenko, V. M.; Zanette, S. I.

doi:10.1103/physreva.71.042901

Cited by 106 publications

(106 citation statements)

References 33 publications

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“…They are responsible for interaction of electrically neutral, but polarizable, particles with material surfaces [7,8,9,10], find applications in nanoscience [11,12,13,14], play important role in many effects of condensed matter physics [15,16,17,18,19,20], and are even used in elementary particle physics for constraining some theoretical predictions beyond the standard model [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Mostepanenko¹

2017

J. Phys.: Condens. Matter

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Abstract. The Casimir free energy of dielectric films, both free-standing in vacuum and deposited on metallic or dielectric plates, is investigated. It is shown that the values of the free energy depend considerably on whether the calculation approach used neglects or takes into account the dc conductivity of film material. We demonstrate that there are the material-dependent and universal classical limits in the former and latter cases, respectively. The analytic behavior of the Casimir free energy and entropy for a free-standing dielectric film at low temperature is found. According to our results, the Casimir entropy goes to zero when the temperature vanishes if the calculation approach with neglected dc conductivity of a film is employed. If the dc conductivity is taken into account, the Casimir entropy takes the positive value at zero temperature, depending on the parameters of a film, i.e., the Nernst heat theorem is violated. By considering the Casimir free energy of SiO 2 and Al 2 O 3 films deposited on a Au plate in the framework of two calculation approaches, we argue that physically correct values are obtained by disregarding the role of dc conductivity. A comparison with the well known results for the configuration of two parallel plates is made. Finally, we compute the Casimir free energy of SiO 2 , Al 2 O 3 and Ge films deposited on high-resistivity Si plates of different thicknesses and demonstrate that it can be positive, negative and equal to zero. The effect of illumination of a Si plate with laser light is considered. Possible applications of the obtained results to thin films used in microelectronics are discussed.

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Section: Introductionmentioning

confidence: 99%

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Mostepanenko¹

2017

J. Phys.: Condens. Matter

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“…Theoretical description of atom-wall interaction is given by the Lifshitz theory [1,2,4,5,14] which expresses the van der Waals and Casimir-Polder energy and force through the dynamic electric polarizability of an atom and the frequency-dependent dielectric permittivity of wall material. A large body of research of atom-wall interactions for different atoms and wall materials on the basis of the Lifshitz theory has been performed in the literature [1,2,4,5,[15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Comparison of hydrodynamic and Dirac models of dispersion interaction between graphene and H,He∗, or Na atoms

et al. 2010

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The van der Waals and Casimir-Polder interaction of different atoms with graphene is investigated using the Dirac model which assumes that the energy of quasiparticles is linear with respect to the momentum. The obtained results for the van der Waals coefficients of hydrogen atoms and molecules and atoms of metastable He * and Na as a function of separation are compared with respective results found using the hydrodynamic model of graphene. It is shown that, regardless of the value of the gap parameter, the Dirac model leads to much smaller values of the van der Waals coefficients than the hydrodynamic model. The experiment on quantum reflection of metastable He * and Na atoms on graphene is proposed which is capable to discriminate between the two models of the electronic structure of graphene. In this respect the parameters of the phenomenological potential for both these atoms interacting with graphene described by different models are determined.

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“…16 The experimental difficulties are, in fact, in pair with the theoretical ones, since fully ab initio calculations are also challenging. Most of the calculations reported in the literature 17,18 are generally limited to atoms or very small molecules, and the bulk detailed microscopic structure is replaced by some model ͑e.g., the stabilized jellium model for metals͒. An interesting approach consists in modeling the molecular polarizability using the form of the long-wavelength density response of a homogeneous electron gas.…”

Section: Introductionmentioning

confidence: 99%

Cluster-surface and cluster-cluster interactions:Ab initiocalculations and modeling of asymptotic van der Waals forces

et al. 2008

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We present fully ab initio calculations of van der Waals coefficients for two different situations: ͑i͒ the interaction between hydrogenated silicon clusters and ͑ii͒ the interactions between these nanostructures and a nonmetallic surface ͑a silicon or a silicon carbide surface͒. The methods used are very efficient and allow the calculation of systems containing hundreds of atoms. The results obtained are further analyzed and understood with the help of simple models. These models can be of interest for molecular-dynamics simulations of silicon nanostructures on surfaces, where they can give a very fast yet sufficiently accurate determination of the van der Waals interaction at large separations.

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Dependences of the van der Waals atom-wall interaction on atomic and material properties

Cited by 106 publications

References 33 publications

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Comparison of hydrodynamic and Dirac models of dispersion interaction between graphene and H,He∗, or Na atoms

Cluster-surface and cluster-cluster interactions:Ab initiocalculations and modeling of asymptotic van der Waals forces

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