Single crystal growth and physical properties of superconducting ferro-pnictides Ba(Fe, Co)2As2 grown using self-flux and Bridgman techniques

Aswartham, Saicharan; Nacke, Ch.; Friemel, G.; Leps, N.; Wurmehl, S.; Wizent, N.; Heß, Christian; Klingeler, R.; Behr, G.; Singh, Surjeet; Büchner, B.

doi:10.1016/j.jcrysgro.2010.11.149

Cited by 29 publications

(36 citation statements)

References 38 publications

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“…High quality single crystals of Ba(FeAs) 2 were synthesized using a modified self-flux method described in detail in a recent literature [11]. In this synthesis technique, a temperature gradient is employed to separate the grown crystals from the employed FeAs flux in place of the usual decanting process in order to avoid possible thermal shocks.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)₂

et al. 2014

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Unconventional high temperature superconductivity as well as three-dimensional bulk Dirac cone quantum states arising from the unique d-orbital topology have comprised an intriguing research area in physics. Here we apply a special analytical approach using a mobility spectrum, in which the carrier number is conveniently described as a function of mobility without any hypothesis, both on the types and the numbers of carriers, for the interpretations of longitudinal and transverse electric transport of high quality single crystal Ba(FeAs) 2 in a wide range of magnetic fields. We show that the majority carriers are accommodated in large parabolic hole and electron pockets with very different topology as well as remarkably different mobility spectra, whereas the minority carriers reside in Dirac quantum states with the largest mobility as high as 70,000 cm 2 (Vs) −1 . The deduced mobility spectra are discussed and compared to the reported sophisticated first principle band calculations.

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Section: Experiments and Resultsmentioning

confidence: 99%

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)₂

et al. 2014

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“…High quality single crystals of BaFe 2 As 2 were grown by the self flux technique [60]. For the detwinned measurements, a sample with approximate dimensions of 1500 × 1200 × 50 µm with uniform thickness and regular facets was selected and mounted across the plates of the horseshoe-shaped device, aligned by eye (within ∼ 2 • ) such that the Fe-Fe direction was parallel with the direction of strain.…”

Section: Methodsmentioning

confidence: 99%

Probing the reconstructed Fermi surface of antiferromagnetic BaFe2As2 in one domain

et al. 2019

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We revisit the electronic structure of BaFe2As2, the archetypal parent compound of the Fe-based superconductors, using angle-resolved photoemission spectroscopy (ARPES). Our high-resolution measurements of samples "detwinned" by the application of a mechanical strain reveal a highly anisotropic 3D Fermi surface in the low temperature magnetic phase. By comparison of the observed dispersions with ab-initio calculations, we argue that overall it is magnetism, rather than orbital ordering, which is the dominant effect, reconstructing the electronic structure across the Fe 3d bandwidth. Finally, we measure band dispersions directly from within one domain without applying strain to the sample, by using the sub-micron focused beam spot of a nano-ARPES instrument. :1902.10266v1 [cond-mat.supr-con] arXiv

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“…Sensitivity factors for the auger electron spectroscopy spectra were evaluated using single crystals 33 . Parts of the thin film and the single crystal were sputtered, and the resulting spectra were analysed in a JEOL JAMP 9500F field emission Auger microprobe (see Supplementary Fig.…”

Section: Methodsmentioning

confidence: 99%

Strain induced superconductivity in the parent compound BaFe2As2

Engelmann

Grinenko

Chekhonin³

et al. 2013

Nat Commun

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The discovery of superconductivity (SC) with a transition temperature, T c , up to 65 K in single-layer FeSe (bulk T c = 8 K) films grown on SrTiO 3 substrates has attracted special attention to Fe-based thin films. The high T c is a consequence of the combined effect of electron transfer from the oxygen-vacant substrate to the FeSe thin film and lattice tensile strain. Here we demonstrate the realization of SC in the parent compound BaFe 2 As 2 (no bulk T c ) just by tensile lattice strain without charge doping. We investigate the interplay between strain and SC in epitaxial BaFe 2 As 2 thin films on Fe-buffered MgAl 2 O 4 single crystalline substrates. The strong interfacial bonding between Fe and the FeAs sublattice increases the Fe-Fe distance due to the lattice misfit which leads to a suppression of the antiferromagnetic spin density wave and induces SC with bulk-T c ≈ 10 K. These results highlight the role of structural changes in controlling the phase diagram of Fe-based superconductors.

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Single crystal growth and physical properties of superconducting ferro-pnictides Ba(Fe, Co)2As2 grown using self-flux and Bridgman techniques

Cited by 29 publications

References 38 publications

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)₂

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)₂

Probing the reconstructed Fermi surface of antiferromagnetic BaFe2As2 in one domain

Strain induced superconductivity in the parent compound BaFe2As2

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Single crystal growth and physical properties of superconducting ferro-pnictides Ba(Fe, Co)2As2 grown using self-flux and Bridgman techniques

Cited by 29 publications

References 38 publications

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)2

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)2

Probing the reconstructed Fermi surface of antiferromagnetic BaFe2As2 in one domain

Strain induced superconductivity in the parent compound BaFe2As2

Contact Info

Product

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Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)₂

Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)₂