Temperature dependence of the upper critical field of FeSe single crystals

Vedeneev, S. I.; Piot, B. A.; Maude, D. K.; Sadakov, A. V.

doi:10.1103/physrevb.87.134512

Cited by 86 publications

(83 citation statements)

References 26 publications

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“…In, brief the crystal growth itself is not only an expensive affair but is rather state of art and an independent research field. The Fe based chalcegonide superconductors are grown by both added flux (NaCl/KCl) [15][16][17][18] and the self flux method. [19][20][21][22][23] Worth mentioning is the fact that the single crystals of FeSe cannot be grown directly from the melt.…”

Section: Introductionmentioning

confidence: 99%

Flux free growth of large FeSe1/2Te1/2 superconducting single crystals by an easy high temperature melt and slow cooling method

et al. 2015

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We report successful growth of flux free large single crystals of superconducting FeSe 1/2 Te 1/2 with typical dimensions of up to few cm. The AC and DC magnetic measurements revealed the superconducting transition temperature (T c ) value of around 11.5K and the isothermal MH showed typical type-II superconducting behavior. The lower critical field (H c1 ) being estimated by measuring the low field isothermal magnetization in superconducting regime is found to be above 200Oe at 0K. The temperature dependent electrical resistivity ρ(T ) showed the T c (onset) to be 14K and the T c (ρ=0) at 11.5K. The electrical resistivity under various magnetic fields i.e., ρ(T)H for H//ab and H//c demonstrated the difference in the width of T c with applied field of 14Tesla to be nearly 2K, confirming the anisotropic nature of superconductivity. The upper critical and irreversibility fields at absolute zero temperature i.e., H c2 (0) and H irr (0) being determined by the conventional one-band Werthamer-Helfand-Hohenberg (WHH) equation for the criteria of normal state resistivity (ρ n ) falling to 90% (onset), and 10% (offset) is 76.9Tesla, and 37.45Tesla respectively, for H//c and 135.4Tesla, and 71.41Tesla respectively, for H//ab. The coherence length at the zero temperature is estimated to be above 20Ǻ by using the Ginsburg-Landau theory. The activation energy for the FeSe 1/2 Te 1/2 in both directions H//c and H//ab is determined by using Thermally Activation Flux Flow (TAFF) model.

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Section: Introductionmentioning

confidence: 99%

Flux free growth of large FeSe1/2Te1/2 superconducting single crystals by an easy high temperature melt and slow cooling method

et al. 2015

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“…As shown in the figure 3 (a) - (e) [29][30][31]. Here, we considered the onset transition temperature as the upper critical field T c (H c2 ).…”

Section: ) ]mentioning

confidence: 99%

An Intercomparison of the Upper Critical Fields (H c 2 ) of Different Superconductors—YBa2Cu3 O 7, MgB2, NdFeAsO 0 . 8 F 0 . 2 , FeSe 0 . 5 Te 0 . 5 and Nb2PdS5

Sultana

Rani

Hafiz

et al. 2016

J Supercond Nov Magn

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Here we report the comparison of the upper critical fields of different superconductors being calculated by two different theories i.e., Werthamer Helfand Hohenburg (WHH) and Ginzberg Landau (GL). All the samples are synthesized through previously known solid state reaction route. Phase purity is determined from the Rietveld refinement of powder X-Ray diffraction (XRD) data. High field (up to 14Tesla) magneto transport ρ(T)H of different superconductors is studied to estimate their upper critical field (H c2

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“…The upper critical magnetic field is very strong for some unconventional superconductors [1][2][3] in low temperature. In this case, the Zeeman effect should be considered.…”

Section: Introductionmentioning

confidence: 99%

The Zeeman-split superconductivity with Rashba and Dresselhaus spin–orbit coupling

Zhao

2017

Int. J. Mod. Phys. B

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Temperature dependence of the upper critical field of FeSe single crystals

Cited by 86 publications

References 26 publications

Flux free growth of large FeSe1/2Te1/2 superconducting single crystals by an easy high temperature melt and slow cooling method

Flux free growth of large FeSe1/2Te1/2 superconducting single crystals by an easy high temperature melt and slow cooling method

An Intercomparison of the Upper Critical Fields (H c 2 ) of Different Superconductors—YBa2Cu3 O 7, MgB2, NdFeAsO 0 . 8 F 0 . 2 , FeSe 0 . 5 Te 0 . 5 and Nb2PdS5

The Zeeman-split superconductivity with Rashba and Dresselhaus spin–orbit coupling

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