Bound Chains of Tilted Dipoles in Layered Systems

Volosniev, A. G.; Armstrong, J. R.; Fedorov, D. V.; Jensen, A. S.; Zinner, N. T.

doi:10.1007/s00601-012-0444-9

Cited by 8 publications

(12 citation statements)

References 64 publications

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“…For the interlayer potential in Eq. (1), the harmonic approach has proven very accurate in reproducing energy, spatial structure, and wave function [31,35,36,62]. The real dipole potential is thus replaced by…”

Section: Methodsmentioning

confidence: 99%

Thermodynamics of Dipolar Chain Systems

et al. 2012

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The thermodynamics of a quantum system of layers containing perpendicularly oriented dipolar molecules is studied within an oscillator approximation for both bosonic and fermionic species. The system is assumed to be built from chains with one molecule in each layer. We consider the effects of the intralayer repulsion and quantum statistical requirements in systems with more than one chain. Specifically, we consider the case of two chains and solve the problem analytically within the harmonic Hamiltonian approach which is accurate for large dipole moments. The case of three chains is calculated numerically. Our findings indicate that thermodynamic observables, such as the heat capacity, can be used to probe the signatures of the intralayer interaction between chains. This should be relevant for near future experiments on polar molecules with strong dipole moments.Comment: 15 pages, 5 figures, final versio

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Section: Methodsmentioning

confidence: 99%

Thermodynamics of Dipolar Chain Systems

et al. 2012

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“…Note that when decreasing the value of dk F , eventually our exchange-only formalism becomes questionable, since it neglects interlayer correlations. In fact, for k F d 1, interlayer pairing (e.g., dimers in the two-layer configuration [48] and bound chains in multilayers [49]) is expected to dominate over stripe formation, and this is not included in our approximation scheme.…”

Section: N Layersmentioning

confidence: 99%

Dipolar fermions in a multilayer geometry

2017

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We investigate the behavior of identical dipolar fermions with aligned dipole moments in two-dimensional multilayers at zero temperature. We consider density instabilities that are driven by the attractive part of the dipolar interaction and, for the case of bilayers, we elucidate the properties of the stripe phase recently predicted to exist in this interaction regime. When the number of layers is increased, we find that this "attractive" stripe phase exists for an increasingly larger range of dipole angles, and if the interlayer distance is sufficiently small, the stripe phase eventually spans the full range of angles, including the situation where the dipole moments are aligned perpendicular to the planes. In the limit of an infinite number of layers, we derive an analytic expression for the interlayer effects in the density-density response function and, using this result, we find that the stripe phase is replaced by a collapse of the dipolar system.Comment: 9 pages, 8 figure

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“…Recent works show the effect of a fixed and oscillating external magnetic field on the crystal structures [20,21], evidencing that the configuration of the system can be controlled by the orientation of the magnetic field. Numerical works on these systems demonstrated the pos-sibility of cluster formation [22,23] as well as few-body bound states [24,25] and local deformations in elongated dipolar gases [26]. Additionally, different transitions between Fermi liquid, solitons and Wigner crystals have been predicted [27,28] as well as some tunable assemblies [29].…”

Section: Introductionmentioning

confidence: 99%

Magnetic particles confined in a modulated channel: Structural transitions tunable by tilting a magnetic field

et al. 2014

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The ground state of colloidal magnetic particles in a modulated channel are investigated as function of the tilt angle of an applied magnetic field. The particles are confined by a parabolic potential in the transversal direction while in the axial direction a periodic substrate potential is present. By using Monte Carlo (MC) simulations, we construct a phase diagram for the different crystal structures as a function of the magnetic field orientation, strength of the modulated potential and the commensurability factor of the system. Interestingly, we found first and second order phase transitions between different crystal structures, which can be manipulated by the orientation of the external magnetic field. A re-entrant behavior is found between two-and four-chain configurations, with continuous second order transitions. Novel configurations are found consisting of frozen in solitons. By changing the orientation and/or strength of the magnetic field and/or the strength and the spatial frequency of the periodic substrate potential, the system transits through different phases.

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Bound Chains of Tilted Dipoles in Layered Systems

Cited by 8 publications

References 64 publications

Thermodynamics of Dipolar Chain Systems

Thermodynamics of Dipolar Chain Systems

Dipolar fermions in a multilayer geometry

Magnetic particles confined in a modulated channel: Structural transitions tunable by tilting a magnetic field

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