Publisher's Note: Hall effect in superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>Fe</mml:mtext><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>Se</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Te</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>thin films [Phys. Rev. B<b>81</b>, 054

Tsukada, I.; Hanawa, Masafumi; Komiya, Seiki; Akiike, T.; Tanaka, Ryo; Imai, Yoshiki; Maeda, Akiko

doi:10.1103/physrevb.81.099903

Cited by 18 publications

(36 citation statements)

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“…Hence, we believe, our data shows a substantial influence of AHE in the transverse resistivity. We note that recently AHE was also reported in FeSe 1-x Te x films [22]. Shown in figure 2(b) (filled symbols) is the temperature dependence of the Hall coefficient R H obtained from the H-linear portion of ρ xy .…”

supporting

confidence: 57%

Transport and magnetic properties of Co-doped BaFe₂As₂epitaxial thin films grown on MgO substrate

Mohan

Taen

Yagyuda

et al. 2010

Supercond. Sci. Technol.

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Abstract. We report resistivity, Hall coefficient, current-voltage characteristics, and magneto-optical imaging measurements of epitaxial Co-doped BaFe 2 As 2 thin films deposited on MgO(001) substrate. The Hall resistivity of the films has a substantial contribution arising from anomalous Hall effect of ferromagnetic components. The critical current density (J c ) of the films is ~2 MA/cm 2 at low temperatures. Differential magneto-optical images of the remanent state give similar J c values and also exhibit presence of extended defects in the film.

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confidence: 57%

Transport and magnetic properties of Co-doped BaFe₂As₂epitaxial thin films grown on MgO substrate

Mohan

Taen

Yagyuda

et al. 2010

Supercond. Sci. Technol.

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“…Longitudinal and transverse (Hall) resistivities were measured by six-lead method with a Physical Property Measurement System (PPMS, Quantum Design) at temperatures down to 2 K and magnetic fields up to 9 T. In order to decrease the contact resistance, we sputtered gold on the contact pads just after the cleavage, then gold wires were attached on the contacts with silver paste. behavior (dρ/dT > 0) below 100 ∼ 150 K. Actually, some previously reported resistive results on FeTe 1−x Se x show semiconducting behavior before superconducting transition temperature [16,17,18], which is interpreted by the effect of excess Fe [16,34]. Density functional study shows that the excess Fe in the interstitial sites is magnetic and interacts with magnetism of Fe in Fe planes [21].…”

Section: Methodsmentioning

confidence: 99%

Evolution of superconducting and transport properties in annealed FeTe_1−xSe_x(0.1 ≤x≤ 0.4) multiband superconductors

Sun

Taen

Yamada

et al. 2015

Supercond. Sci. Technol.

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We investigated the superconducting and transport properties in FeTe 1−x Se x (0.1 ≤ x ≤ 0.4) single crystals prepared by O 2 -annealing. Sharp superconducting transition width observed in magnetization measurement and the small residual resistivity prove the high quality of the crystals. All the crystals manifest large, homogeneous, and isotropic critical current density J c with self-field value over 10 5 A/cm 2 at 2 K. The large and field-robust critical current densities prove that the superconductivity in FeTe 1−x Se x (0.1 ≤ x ≤ 0.4) is in bulk nature. The values of anisotropy parameter close to T c for crystals with different Se doping levels all reside in the range of 2 -3. Hall coefficients R H keeps positive and almost constant value at high temperatures, followed by a sudden decreases before reaching T c , which indicates that the electron-type charge carriers become dominant at low temperatures. Furthermore, the characteristic temperature for the sudden decrease in R H gradually increases with Se doping. arXiv:1502.04284v1 [cond-mat.supr-con]

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“…8) Hall effect measurements are one of the powerful techniques to trace how the electronic state changes from FeTe with Se substitution. 13) In this letter, we report on the detailed Hall-effect measurements in the parent compound FeTe thin films, and try to apply two-band Drude picture to demonstrate an interplay of electrons and holes using resistivity and Hall coefficients data. Although the band calculation predicts the sufficient amount of electron and hole density in FeTe, difference of the magnitude of mobility is remarkable not only in the paramagnetic (PM) but also in the AFM states, which suggests the absence of interplay between two types of carriers.…”

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confidence: 99%

“…13) We first measure the transverse resistivity by sweeping the magnetic field between -9 T ≤ µ 0 H ≤ 9 T applied normal to the film surface, and then extract an asymmetric component to determine the Hall resistivity ρ xy . Figures 2(a) -2(c) show the field dependence of ρ xy at different temperatures.…”

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confidence: 99%

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Mobility Analysis of FeTe Thin Films

et al. 2011

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The Hall effect is investigated in detail for nonsuperconducting and superconducting FeTe thin films. The Hall coefficient commonly exhibits a sign reversal from positive in a hightemperature paramagnetic state to negative in a low-temperature antiferromagnetic state.Phenomenological analysis by a simple two-band Drude model indicates that hole mobility is significantly suppressed in the antiferromagnetic state. When suppression of the hole mobility is insufficient, superconductivity shows up in FeTe. This result strongly suggests that the itinerancy in both hole and electron channels is the essential factor for the occurrence of superconductivity in iron chalcogenide superconductors.KEYWORDS: iron chalcogenide, FeTe, Hall effect, thin films, two-band model Iron-pnictide 1) and iron-chalcogenide 2) superconductors are interesting materials when compared with cuprate superconductors. In both compounds, superconductivity is induced by chemical substitution to a parent antiferromagnet suggesting a possible common mechanism resulting in a similar phase diagram. However, the nature of the antiferromagnetic (AFM) state is qualitatively different. Cuprates are characterized as single-band metals and become an insulator, while iron-based superconductors are characterized as multi-band metals, [3][4][5] and exhibit metallic behavior even in the AFM state. 6) Actually undoped parent compounds of iron-based superconductors are compensated metals, where both electrons and holes contribute to the electrical transport. Therefore, this difference should be carefully considered when discussing the phase diagram, and it is important to understand how electrons and holes contribute to the electrical transport and superconductivity.The multi-band nature of iron-based superconductors has been predicted by several band calculations carried out for LaFeAsO, 3) BaFe 2 As 2 , 7) and Fe(Se,Te). 8) In LaFeAsO and BaFe 2 As 2 , superconductivity is induced by chemical substitution of elements with different *

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Publisher's Note: Hall effect in superconductingFe(Se0.5Te0.5)thin films [Phys. Rev. B81, 054

Cited by 18 publications

References 0 publications

Transport and magnetic properties of Co-doped BaFe₂As₂epitaxial thin films grown on MgO substrate

Transport and magnetic properties of Co-doped BaFe₂As₂epitaxial thin films grown on MgO substrate

Evolution of superconducting and transport properties in annealed FeTe_1−xSe_x(0.1 ≤x≤ 0.4) multiband superconductors

Mobility Analysis of FeTe Thin Films

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Publisher's Note: Hall effect in superconductingFe(Se0.5Te0.5)thin films [Phys. Rev. B81, 054

Cited by 18 publications

References 0 publications

Transport and magnetic properties of Co-doped BaFe2As2epitaxial thin films grown on MgO substrate

Transport and magnetic properties of Co-doped BaFe2As2epitaxial thin films grown on MgO substrate

Evolution of superconducting and transport properties in annealed FeTe1−xSex(0.1 ≤x≤ 0.4) multiband superconductors

Mobility Analysis of FeTe Thin Films

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Product

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Transport and magnetic properties of Co-doped BaFe₂As₂epitaxial thin films grown on MgO substrate

Transport and magnetic properties of Co-doped BaFe₂As₂epitaxial thin films grown on MgO substrate

Evolution of superconducting and transport properties in annealed FeTe_1−xSe_x(0.1 ≤x≤ 0.4) multiband superconductors