Electric conduction in quasi-one-dimensional compound KFeS2

Nishioka, S.; Kuriyaki, Hisao; Hiraawa, Y.

doi:10.1016/0379-6779(94)03087-m

Cited by 11 publications

(11 citation statements)

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“…This suggests that the Hubbard model is more appropriate for studying the KFeS 2 . This point of view is in agreement with the temperature dependence of the electrical resistivity of the KFeS 2 that presents a semiconducting behavior [5]. We can observe that our fitting was obtained considering the relation of the Hubbard model parameters as being equal to U=t ¼ 4 with is exactly the value of the bandwidth of the noninteracting one-dimensional Hubbard model, and is closely related to a semiconducting behavior.…”

supporting

confidence: 77%

“…The FeFe intrachain distance (0.270 nm) is only 8.9% larger than the Fe-Fe distance in metallic iron (0.248 nm). This gives rise to strong covalence effects and indicates the presence of partial itinerance of the Fe 3d electrons for the KFeS 2 [4,5]. Therefore, the theoretical study of the magnetic properties of this compound (as well as those of the thioferrates family) must be made considering itinerant electron magnetic models.…”

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confidence: 97%

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Magnetic behavior of the KFeS2

Souza

Neto

Macedo

2004

Journal of Magnetism and Magnetic Materials

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supporting

confidence: 77%

mentioning

confidence: 97%

Magnetic behavior of the KFeS2

Souza

Neto

Macedo

2004

Journal of Magnetism and Magnetic Materials

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“…However, the resistivity along the 𝑏-axis was found to be insulating, supported by the theoretical study by Luo et al [19] However, based on a detailed analysis of the magnetic properties, Seidov et al [15] argued that TlFeSe 2 should be 1D metal, which is hidden by the mechanical breaks and structural imperfections within the chains. Nishioka et al [34] have pointed out similar situations in KFeS 2 , in which the lowest resistivity was achieved on the annealed samples. Nevertheless, a metallic behavior has never been realized in these samples.…”

Section: -3mentioning

confidence: 73%

Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe₂*

Liu¹,

Dong²,

Shan³

et al. 2020

Chinese Phys. Lett.

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We report a comprehensive high-pressure study on the monoclinic TlFeSe2 single crystal, which is an antiferromagnetic insulator with quasi-one-dimensional crystal structure at ambient pressure. It is found that TlFeSe2 undergoes a pressure-induced structural transformation from the monoclinic phase to an orthorhombic structure above P c ≈ 13 GPa, accompanied with a large volume collapse of ΔV/V 0 = 8.3%. In the low-pressure monoclinic phase, the insulating state is easily metallized at pressures above 2 GPa; while possible superconductivity with T c onset ∼ 2 K is found to emerge above 30 GPa in the high-pressure phase. Such a great tunability of TlFeSe2 under pressure indicates that the ternary AFeSe2 system (A = Tl, K, Cs, Rb) should be taken as an important platform for explorations of interesting phenomena such as insulator-metal transition, dimensionality crossover, and superconductivity.

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“…Below this temperature, the resistance is out of the limitation of our instrument. The semiconducting behavior was also observed in the 1D system such as KFeS 2 , TlFeS 2 , TlFeSe 2 , and RbFeSe 2 23,28,42 , where it is ascribed to the fiber-like morphology of the 1D structure which contains defects and breaks in the sample.…”

Section: Resultsmentioning

confidence: 86%

Spin dynamics of the spin chain antiferromagnet RbFeS$_2$

Li,

Zheng,

Frandsen

et al. 2021

Preprint

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We report transport and inelastic neutron scattering studies on electronic properties and spin dynamics of the quasi-one-dimensional spin chain antiferromagnet RbFeS2. An antiferromagnetic phase transition at TN ≈ 195 K and dispersive spin waves with a spin gap of 5 meV are observed. By modeling the spin excitation spectra using linear spin wave theory, intra and inter-chain exchange interactions are found to be SJ1 = 100(5) meV and SJ3 = 0.9(3) meV, respectively, together with a small single-ion anisotropy of SDzz = 0.04(1) meV. Comparison with previous results for other materials in the same class of Fe 3+ spin chain systems reveals that although the magnetic order sizes show significant variation from 1.8 to 3.0µB within the family of materials, the exchange interactions SJ are nevertheless quite similar, analogous to the iron pnictide superconductors where both localized and delocalized electrons contribute to the spin dynamics.

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Electric conduction in quasi-one-dimensional compound KFeS2

Cited by 11 publications

References 5 publications

Magnetic behavior of the KFeS2

Magnetic behavior of the KFeS2

Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe₂*

Spin dynamics of the spin chain antiferromagnet RbFeS$_2$

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Electric conduction in quasi-one-dimensional compound KFeS2

Cited by 11 publications

References 5 publications

Magnetic behavior of the KFeS2

Magnetic behavior of the KFeS2

Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe2*

Spin dynamics of the spin chain antiferromagnet RbFeS$_2$

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Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe₂*