Pinned Bilayer Wigner Crystals with Pseudospin Magnetism

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dc.creatorChen, Yong P.
dc.date2005-07-05
dc.date2006-03-23
dc.date.accessioned2026-07-07T06:41:16Z
dc.date.available2026-07-07T06:41:16Z
dc.descriptionWe study a model of \textit{pinned} bilayer Wigner crystals (WC) and focus on the effects of interlayer coherence (IC) on pinning. We consider both a pseudospin ferromagnetic WC (FMWC) with IC and a pseudospin antiferromagnetic WC (AFMWC) without IC. Our central finding is that a FMWC can be pinned more strongly due to the presence of IC. One specific mechanism is through the disorder induced interlayer tunneling, which effectively manifests as an extra pinning in a FMWC. We also construct a general "effective disorder" model and effective pinning Hamiltonian for the case of FMWC and AFMWC respectively. Under this framework, pinning in the presence of IC involves \textit{interlayer} spatial correlation of disorder in addition to intralayer correlation, leading to \textit{enhanced} pinning in the FMWC. The pinning mode frequency (\wpk) of a FMWC is found to decease with the effective layer separation, whereas for an AFMWC the opposite behavior is expected. An abrupt drop of \wpk is predicted at a transition from a FMWC to AFMWC. Possible effects of in-plane magnetic fields and finite temperatures are addressed. Finally we discuss some other possible ramifications of the FMWC as an electronic supersolid-like phase.
dc.descriptionSlightly revised. The final version is published on PRB
dc.identifierhttps://arxiv.org/abs/cond-mat/0507124
dc.identifierhttp://arxiv.org/abs/cond-mat/0507124
dc.identifierPhys. Rev. B 73, 115314 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.115314
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/101613
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titlePinned Bilayer Wigner Crystals with Pseudospin Magnetism
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