Phase diagram of classical electronic bilayers

Ranganathan, S.; Johnson, R. E.

doi:10.1088/0305-4470/39/17/s44

Cited by 2 publications

(3 citation statements)

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“…We have used this criterion to define the phase diagram in e-e bilayers. 5 Figure 5 shows plots of the first maximum of the intralayer structure factor S 11 ͑q 0 ͒ as a function of d for some representative values of ⌫. The horizontal line is drawn at 5.2 as it is a little more consistent with the diffusion data.…”

Section: Phase Diagrammentioning

confidence: 99%

“…Such systems have been shown to exhibit a rich variety of interesting features as a function of d: MD studies have shown, for example, that the system exhibits a series of abrupt structural changes, the diffusion coefficient goes through a minimum, 2 and the phase changes from a liquid to a solid and back to a liquid. 5,9 On the other hand, the electron-hole ͑e-h͒ system in which the two layers are made up of charged particles of opposite charges behaves somewhat differently because of the Coulomb attraction between the electrons and the holes which naturally binds them to form dipoles especially at small interlayer separations. This phenomenon would contribute significantly to the structural and dynamical properties of such a system.…”

Section: Introductionmentioning

confidence: 99%

“…11 In this study, we analyze the static structure factor and the diffusion coefficient to arrive at a phase diagram. The criterion for freezing based on the peak value of the static structure factor has been applied to other systems in two-dimensions 12,13 and to an e-e bilayer, 5 and seems to be universally valid.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diffusion and phase diagram of an electron-hole bilayer: A molecular dynamics study

Ranganathan

Johnson

2007

Phys. Rev. B

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Molecular dynamics simulations of a classical, symmetric electron-hole bilayer for various values of the coupling strength ⌫ and interlayer separation distance d have been performed. We have analyzed the pair correlation functions, the static structure factor, and the diffusion coefficient in this study. As d is decreased, diffusion goes through a minimum and then increases very rapidly; its behavior at small d can be attributed to the formation of stable, weakly interacting electron-hole dipoles. We have constructed the phase diagram in the ⌫-d plane based on the amplitude of the main peak of the intralayer static structure factor and the diffusion coefficient. It is found that a solid phase is not possible for d less than about 0.5 for any ⌫, nor for ⌫ less than about 100 for any d. Our phase diagram, obtained using a different methodology, is in good agreement with the one in the literature.

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Section: Phase Diagrammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%