Direct observation of in-plane anisotropy of the superconducting critical current density in 
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Hecher, J; Ishida, Shigeyuki; Song, Dongjoon; Iyo, A.; Eisaki, H.; Nakajima, M.; Kagerbauer, Daniel; Eisterer, M.

doi:10.1103/physrevb.97.014511

Cited by 9 publications

(6 citation statements)

References 23 publications

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“…The strong difference in dissipation between TS and CS samples in the mixed superconducting vortex liquid phase, is qualitatively consistent with both the observed difference in T g and the reported critical current in-plane anisotropy in the absence of DBs for similar compositions 46 . Hecher et al attribute the observed J c anisotropy either to an anisotropic pinning efficiency induced by Co impurities or to the multiband electronic structure of these compounds.…”

Section: Resultssupporting

confidence: 87%

Nematicity in the superconducting mixed state of strain detwinned underdoped $\text{Ba}(\text{Fe}_{1-x}\text{Co}_x)_2\text{As}_2$

Schmidt,

Bekeris,

Lozano

et al. 2019

Preprint

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Evidence of nematic effects in the mixed superconducting phase of slightly underdoped Ba(Fe1−xCox)2As2 is reported. We have found strong in-plane resistivity anisotropy for crystals in different strain conditions. For these compositions, there is no magnetic long range order, so the description may be ascribed to the interplay between the superconducting and nematic order parameters. A piezoelectric-based apparatus is used to apply tensile or compressive strain to tune nematic domain orientation in order to examine intrinsic nematicity. Measurements are done under a rotating magnetic field and the analysis of the angular dependence of physical quantities identifies the cases in which the sample is detwinned. Furthermore, the angular dependence of the data allows us to evaluate the effects of nematicity on the in-plane superconductor stiffness. Our results show that although nematicity contributes in a decisive way to the conduction properties, its contributions to the anisotropy properties of the stiffness of the superconducting order parameter is not as significant in these samples.

show abstract

Section: Resultssupporting

confidence: 87%

Nematicity in the superconducting mixed state of strain detwinned underdoped $\text{Ba}(\text{Fe}_{1-x}\text{Co}_x)_2\text{As}_2$

Schmidt,

Bekeris,

Lozano

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…The strong difference in dissipation between strained (TS) and compressed (CS) samples in the mixed superconducting vortex liquid phase, is qualitatively consistent with both the observed difference in T g and the reported critical current inplane anisotropy in the absence of DBs for similar compositions 46 . Hecher et al attribute the observed J c anisotropy either to an anisotropic pinning efficiency induced by Co impurities or to the multiband electronic structure of these compounds.…”

Section: Resultssupporting

confidence: 84%

Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe1−xCox)2As2

et al. 2019

View full text Add to dashboard Cite

Evidence of nematic effects in the mixed superconducting phase of slightly underdoped Ba(Fe1−xCox)2As2 is reported. We have found strong in-plane resistivity anisotropy for crystals in different strain conditions. For these compositions, there is no magnetic long range order, so the description may be ascribed to the interplay between the superconducting and nematic order parameters. A piezoelectric-based apparatus is used to apply tensile or compressive strain to tune nematic domain orientation in order to examine intrinsic nematicity. Measurements are done under a rotating magnetic field and the analysis of the angular dependence of physical quantities identifies the cases in which the sample is detwinned. Furthermore, the angular dependence of the data allows us to evaluate the effects of nematicity on the in-plane superconductor stiffness. Our results show that although nematicity contributes in a decisive way in the conduction properties, its contributions to the anisotropy properties of the stiffness of the superconducting order parameter is not as significant in these samples.

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“…Fundamentally, the thermopower is entropy per carrier. To evaluate the correlation strength of electronic states in the bulk that may influence anisotropy of both normal state and the J c as well as the current-carrying capability in grain boundaries [28][29][30][31][32][33], in this work we perform thermal transport studies of superconducting FeS 1−x Se x (x = 0 and 0.06) single crystals. The Fermi temperature T F in both crystals is about an order of magnitude smaller when compared to common values in metals.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution

Liu,

Wang,

Ivanovski

et al. 2022

Preprint

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We report thermoelectric studies of FeS1−xSex (x = 0, 0.06) superconducting single crystals that feature high irreversibility fields and critical current density Jc comparable to materials with much higher superconducting critical temperatures (Tc's). The ratio of Tc to the Fermi temperature TF is very small indicating weak electronic correlations. With a slight selenium substitution on sulfur site in FeS both Tc/TF and the effective mass m * rise considerably, implying increase in electronic correlation of the bulk conducting states. The first-principle calculations show rise of the density of states at the Fermi level in FeS0.94Se0.06 when compared to FeS which is related not only to Fe but also to chalcogen-derived electronic states.

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Direct observation of in-plane anisotropy of the superconducting critical current density in Ba(Fe1−xCox)2

Cited by 9 publications

References 23 publications

Nematicity in the superconducting mixed state of strain detwinned underdoped $\text{Ba}(\text{Fe}_{1-x}\text{Co}_x)_2\text{As}_2$

Nematicity in the superconducting mixed state of strain detwinned underdoped $\text{Ba}(\text{Fe}_{1-x}\text{Co}_x)_2\text{As}_2$

Nematicity in the superconducting mixed state of strain detwinned underdoped Ba( Fe1−xCox)2As2

Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution

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