Measurement and Analysis of Normal-State Transport Properties of FeSe Superconductor

Lodhi, Pavitra Devi; Kaurav, Netram; Choudhary, K. K.; Kuo, Y. K.

doi:10.1007/s10909-019-02198-3

Cited by 4 publications

(4 citation statements)

References 32 publications

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“…For magnetic materials, the Seebeck coefficient is an ensemble of many factors, such as carrier diffusion, phonon drag and magnon drag effect. 10 However, this effect is not considerably evaluated and investigated in the scope of this report. To explain the role of multiband for Seebeck coefficient, it is hypothesized to be described as S = (pμ p |S p |-nμ n |S n |)/(nμ n + pμ p ), where S n,p and μ n,p represent the Seebeck coefficients and carriermobility for the n-and p-type carriers, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…To explain the role of multiband for Seebeck coefficient, it is hypothesized to be described as S = (pμ p |S p |-nμ n |S n |)/(nμ n + pμ p ), where S n,p and μ n,p represent the Seebeck coefficients and carriermobility for the n-and p-type carriers, respectively. 10 It is clear that negative S relates to electrical conduction by electrons of which mobility is higher than that of holes. For higher temperature, the competition between the contribution of electrons and holes changes, and then the sign of S inverts.…”

Section: Resultsmentioning

confidence: 99%

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Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO₃(100) Substrate

Duong¹,

Dũng²,

Nguyen³

et al. 2023

ECS J. Solid State Sci. Technol.

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We report on the growth, thermoelectric, magnetic properties, and re-entrant spin-glass state in MnP-type orthorhombic FeAs thin film, grown on LaAlO3 (100) substrate by using a molecular beam epitaxy. The film is polycrystalline with a grain size about 200 nm. Electrical resistivity as a function of temperature revealed a metallic behavior. A sign change of Seebeck coefficient was observed at 370 K, due to the contribution of multiple bands to charge transport. We found a re-entrant spin-glass state in the film, attributed to strain in the sample. As a result, a very sharp spin-glass magnetic transition at 50 K was observed in the temperature dependence of Seebeck coefficient, electrical resistivity, and magnetization curves. The bifurcation point between zero field cooled and field cooled magnetization occurred at 350 K. A ferromagnetic-type behavior was observed over a temperature range from 10 to 300 K, confirming the re-entrant spin-glass state. Where the determined magnetization and coercive field are small, around 7 emu/cm3 and 300 Oe at 10 K, respectively. Our work provided a study on thermoelectric and magnetic properties of re-entrant spin-glass FeAs in thin film form

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO₃(100) Substrate

Duong¹,

Dũng²,

Nguyen³

et al. 2023

ECS J. Solid State Sci. Technol.

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show abstract

“…The difference between the two correlated cases can again be traced back to the xy band, whose positioning below the Fermi level is further supported by this estimation. [63], full circles from [64]), for the temperature range above the nematic transition, occurring around T = 90 K at ambient pressure [65].…”

mentioning

confidence: 99%

“…A Lorentzian broadening η = 0.06 eV has been used in the computation of the theoretical spectra. Seebeck calculations (solid lines, lower panels) are compared with experimental data of FeSe polycrystals (open circles from[63], full circles from[64]), for the temperature range above the nematic transition, occurring around T = 90 K at ambient pressure[65].…”

mentioning

confidence: 99%

Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations

Gorni,

Arribi,

Casula

et al. 2021

Preprint

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The effect of long-term exposure at room temperature on the thermal conductivity of the FeSe superconductor in the normal state

Khadzhai

Solovjov

Kislitsa

et al. 2023

Low Temperature Physics

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The temperature dependence of the thermal conductivity of the iron-based FeSe0.94 superconductor sample has been studied in the range of 4.2–200 K after long-term exposure for 7 years. The temperature dependence of thermal conductivity is predominantly phonon. This dependence was approximated taking into account phonon scattering by the boundaries of the sample, as well as scattering by dislocations, point defects, and phonon-phonon scattering. When comparing the parameters of this approximation with similar parameters for literature data for a freshly prepared polycrystalline sample, it turned out that long-term exposure led to a significant increase in all parameters. That is, long-term exposure causes a significant increase in the number of dislocations, and point defects and intensifies phonon-phonon scattering. For both samples, we found no effect of the structural phase transition at T ≈ 75 K from the tetragonal phase into the orthorhombic one on the thermal conductivity.

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Measurement and Analysis of Normal-State Transport Properties of FeSe Superconductor

Cited by 4 publications

References 32 publications

Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO₃(100) Substrate

Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO₃(100) Substrate

Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations

The effect of long-term exposure at room temperature on the thermal conductivity of the FeSe superconductor in the normal state

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Measurement and Analysis of Normal-State Transport Properties of FeSe Superconductor

Cited by 4 publications

References 32 publications

Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO3(100) Substrate

Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO3(100) Substrate

Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations

The effect of long-term exposure at room temperature on the thermal conductivity of the FeSe superconductor in the normal state

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Product

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Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO₃(100) Substrate

Thermoelectric, Magnetic Properties and Re-entrant Spin-glass State in MBE Grown FeAs Film on LaAlO₃(100) Substrate