Coexistence of Superconductivity and Spin Density Wave (SDW) in Ferropnictide Ba1−x K x Fe2As2

Desta, Tadesse; Kahsay, Gebregziabher; Singh, Pooran

doi:10.1007/s10948-015-3366-1

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…The opposite signs in front of the S(q) and ∆(k) terms of ĤMF would thus imply that no coexistence of SF and SDW phases can occur at any given g value. This has to be compared with models aimed at explaining the phase diagram of selected high-T c superconductors [29,30].…”

Section: Mean-field Treatmentmentioning

confidence: 99%

Quantum phases of spinful Fermi gases in optical cavities

et al. 2018

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We explore the quantum phases emerging from the interplay between spin and motional degrees of freedom of a one-dimensional quantum fluid of spinful fermionic atoms, effectively interacting via a photon-mediating mechanism with tunable sign and strength g, as it can be realized in present-day experiments with optical cavities. We find the emergence, in the very same system, of spin-and atomic-density wave ordering, accompanied by the occurrence of superfluidity for g > 0, while cavity photons are seen to drive strong correlations at all g values, with fermionic character for g > 0, and bosonic character for g < 0. Due to the long-range nature of interactions, to infer these results we combine mean-field and exact diagonalization methods supported by bosonization analysis.

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Section: Mean-field Treatmentmentioning

confidence: 99%

Quantum phases of spinful Fermi gases in optical cavities

et al. 2018

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“…Due to the possibility of careful handling of temperature, statistics, dimensionality, strength and range of the atomic interactions, they allow to reach extreme quantum conditions [1][2][3]. Among current, and most relevant, many-body problems, the relation between spin-density wave (SDW), charge-density wave (CDW), and superfluid (SF) order in FeAs-based superconductors [4][5][6] is recently attracting a great deal of experimental and theoretical interest. Indeed, synthetic engineering of systems which display similar behaviour will lead to a better understanding of the important microscopic mechanisms beyond high-temperature superconductivity [7,8], characterized by non-Fermi liquid behavior in the non-superconducting phase.…”

Section: Introductionmentioning

confidence: 99%

Fluid structure of 1D spinful Fermi gases with long-range interactions

Colella¹,

Chiofalo²,

Barsanti³

et al. 2019

J. Phys. B: At. Mol. Opt. Phys.

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We discuss the fluid structure in the quantum phases of a 1D spinful Fermi gas of atoms interacting via an infinitely long-range coupling, as it may result from a photon-mediated two-body coupling in optical cavities. The system reveals a rich physics, where spin/charge-density wave and superfluid-like order compete with each other. Following our previous work based on a combined mean-field, exact diagonalization and bosonization analysis, we provide the phase diagram of the system and discuss the structure of the fluid, addressing the main features in momentum space of the order parameters, momentum distribution and two-body correlations. We enlighten that the nesting of the Fermi surface in 1D ultimately drives the formation of periodic structures commensurate with the cavity-induced mean-field potential.

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Coexistence of Superconductivity and Spin Density Wave (SDW) in Ferropnictide Ba1−x K x Fe2As2

Cited by 2 publications

References 8 publications

Quantum phases of spinful Fermi gases in optical cavities

Quantum phases of spinful Fermi gases in optical cavities

Fluid structure of 1D spinful Fermi gases with long-range interactions

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