Mean-field theory for the three-dimensional Coulomb glass

Müller, Markus; Pankov, Sergey

doi:10.1103/physrevb.75.144201

Cited by 72 publications

(102 citation statements)

References 77 publications

(133 reference statements)

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“…As compared to the canonical SK model an extra factor of 4 arises because we consider Ising degrees of freedom with magnitude s z i ≡ n i − 1/2 = ±1/2. Remarkably, the soft gap (14) at low fields is universal, that is, independent of the strength of the random fields and the average magnetization (density) [29]. A similar soft gap, the Efros-Shklovskii Coulomb gap [26] is also known to exist in electron glasses with Coulomb interactions [29,33].…”

Section: Insulating Anderson-efros-shklovskii Glassmentioning

confidence: 92%

Quantum charge glasses of itinerant fermions with cavity-mediated long-range interactions

Müller¹,

Strack²,

Sachdev³

2012

Phys. Rev. A

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The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters. We study models of itinerant spinless fermions with random long-range interactions. We motivate such models from descriptions of fermionic atoms in multi-mode optical cavities. The solution of an infinite-range model yields a metallic phase which has glassy charge dynamics, and a localized glass phase with suppressed density of states at low energies. We compare these phases to the conventional disordered Fermi liquid, and the insulating electron glass of semiconductors. Prospects for the realization of such glassy phases in cold atom systems are discussed.

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Section: Insulating Anderson-efros-shklovskii Glassmentioning

confidence: 92%

Quantum charge glasses of itinerant fermions with cavity-mediated long-range interactions

Müller¹,

Strack²,

Sachdev³

2012

Phys. Rev. A

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“…W ≫ e 2 /a, where a is the typical distance between neighboring electrons. In that case, the Coulomb gap is theoretically predicted 30,31 and empirically found 32 to be essentially universal at low energies: ρ(E) exhibits linear variation, ρ(E) = α e 4 |E|. The co-efficient α is basically independent of the type of lattice, the filling fraction, and the details of the disorder 33,34 .…”

Section: Modelmentioning

confidence: 98%

Two-component Coulomb glass in insulators with a local attraction

et al. 2012

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Motivated by evidence of local electron-electron attraction in experiments on disordered insulating films, we propose a new two-component Coulomb glass model that combines strong disorder and long-range Coulomb repulsion with the additional possibility of local pockets of a short-range interelectron attraction. This model hosts a variety of interesting phenomena, in particular a crucial modification of the Coulomb gap previously believed to be universal. Tuning the short-range interaction to be repulsive, we find non-monotonic humps in the density of states within the Coulomb gap. We further study variable-range hopping transport in such systems by extending the standard resistor network approach to include the motion of both single electrons and local pairs. In certain parameter regimes the competition between these two types of carriers results in a distinct peak in resistance as a function of the local attraction strength, which can be tuned by a magnetic field.

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“…Extended DMFT (EDMFT) extends this idea to the electron polarization bubble. [9][10][11][12] In the classical limit t → 0, where the polarization bubble becomes independent of frequency, the standard RPA expression for the polarization of an interacting system equals…”

Section: Emdftmentioning

confidence: 99%

Avoiding Stripe Order: Emergence of the Supercooled Electron Liquid

Rademaker

Ralko

Fratini

et al. 2015

J Supercond Nov Magn

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In the absence of disorder, electrons can display glassy behavior through supercooling the liquid state, avoiding the solidification into a charge ordered state. Such supercooled electron liquids are experimentally found in organic θ-M M compounds. We present theoretical results that qualitatively capture the experimental findings. At intermediate temperatures, the conducting state crosses over into a weakly insulating pseudogap phase. The stripe order phase transition is first order, so that the liquid phase is metastable below T s . In the supercooled liquid phase the resistivity increases further and the density of states at the Fermi level is suppressed, indicating kinetic arrest and the formation of a glassy state. Our results are obtained using classical Extended Dynamical Mean Field Theory.

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Mean-field theory for the three-dimensional Coulomb glass

Cited by 72 publications

References 77 publications

Quantum charge glasses of itinerant fermions with cavity-mediated long-range interactions

Quantum charge glasses of itinerant fermions with cavity-mediated long-range interactions

Two-component Coulomb glass in insulators with a local attraction

Avoiding Stripe Order: Emergence of the Supercooled Electron Liquid

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