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Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 93, Issue 1, Pages 29–33 (Mi jetpl1799)  

This article is cited in 14 scientific papers (total in 14 papers)

CONDENSED MATTER

Electron transport and anisotropy of the upper critical magnetic field in a $\mathrm{Ba_{0.68}K_{0.32}Fe_2As_2}$ single crystals

V. A. Gasparova, F. Wolff-Fabrisb, D. L. Sunc, C. T. Linc, J. Wosnitzab

a Institute of Solid State Physics RAS, 142432 Chernogolovka, Russian Federation
b Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Dresden-Rossendorf, 01314 Dresden, Germany
c Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany

Abstract: Early work on the iron-arsenide compounds supported the view, that a reduced dimensionality might be a necessary prerequisite for high-$T_{c}$ superconductivity. Later, however, it was found that the zero-temperature upper critical magnetic field, $H_{c2}(0)$, for the 122 iron pnictides is in fact rather isotropic. Here, we report measurements of the temperature dependence of the electrical resistivity, $\rho(T)$, in $\mathrm{Ba_{0.5}K_{0.5}Fe_{2}As_{2}}$ and $\mathrm{Ba_{0.68}K_{0.32}Fe_{2}As_{2}}$ single crystals in zero magnetic field and for $\mathrm{Ba_{0.68}K_{0.32}Fe_{2}As_{2}}$ as well in static and pulsed magnetic fields up to 60 T. We find that the resistivity of both compounds in zero field is well described by an exponential term due to inter-sheet umklapp electron-phonon scattering between light electrons around the $M$ point to heavy hole sheets at the $\Gamma$ point in reciprocal space. From our data, we construct an $H-T$ phase diagram for the inter-plane ($H\parallel {c}$) and in-plane ($H\parallel {ab}$) directions for $\mathrm{Ba_{0.68}K_{0.32}Fe_{2}As_{2}}$. Contrary to published data for underdoped {\textrm 122} FeAs compounds, we find that $H_{c2}(T)$ is in fact anisotropic in optimally doped samples down to low temperatures. The anisotropy parameter, $\gamma=H^{ab}_{c2}/H^{c}_{c2}$, is about $2.2$ at $T_{c}$. For both field orientations we find a concave curvature of the $H_{c2}$ lines with decreasing anisotropy and saturation towards lower temperature. Taking into account Pauli spin paramagnetism we perfectly can describe $H_{c2}$ and its anisotropy.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2011, 93:1, 26–30

Bibliographic databases:

Document Type: Article
Received: 23.11.2010
Language: English

Citation: V. A. Gasparov, F. Wolff-Fabris, D. L. Sun, C. T. Lin, J. Wosnitza, “Electron transport and anisotropy of the upper critical magnetic field in a $\mathrm{Ba_{0.68}K_{0.32}Fe_2As_2}$ single crystals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 93:1 (2011), 29–33; JETP Letters, 93:1 (2011), 26–30

Citation in format AMSBIB
\Bibitem{GasWolSun11}
\by V.~A.~Gasparov, F.~Wolff-Fabris, D.~L.~Sun, C.~T.~Lin, J.~Wosnitza
\paper Electron transport and anisotropy of the upper critical magnetic field in a $\mathrm{Ba_{0.68}K_{0.32}Fe_2As_2}$ single crystals
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2011
\vol 93
\issue 1
\pages 29--33
\mathnet{http://mi.mathnet.ru/jetpl1799}
\transl
\jour JETP Letters
\yr 2011
\vol 93
\issue 1
\pages 26--30
\crossref{https://doi.org/10.1134/S0021364011010036}
\isi{http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&DestLinkType=FullRecord&DestApp=ALL_WOS&KeyUT=000288711700006}
\scopus{http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-79953009348}


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    2. Weickert F., Nicklas M., Schnelle W., Wosnitza J., Leithe-Jasper A., Rosner H., “Enhancement of the upper critical field in codoped iron-arsenic high-temperature superconductors”, Journal of Applied Physics, 110:12 (2011), 123906  crossref  adsnasa  isi  scopus
    3. Arushanov E., Levcenko S., Fuchs G., Holzapfel B., Drechsler S.L., Schultz L., “Scaling of the Temperature Dependent Resistivity and Hall Effect in Ba(Fe1-x Co (x) )As-2”, Journal of Superconductivity and Novel Magnetism, 24:8 (2011), 2285–2292  crossref  isi  scopus
    4. Arushanov E., Fuchs G., Levcenko S., Drechsler S.L., Holzapfel B., Schultz L., “Scaling of the temperature-dependent resistivity in 122 iron-pnictide superconductors”, Superconductor Science & Technology, 24:10 (2011), 105004  crossref  adsnasa  isi  scopus
    5. Arushanov E., Levcenko S., Fuchs G., Drechsler S.L., “Scaling of the Temperature Dependent Resistivity in 11 Iron-Pnictide Superconductors”, J. Supercond. Nov. Magn, 25:6 (2012), 1753–1759  crossref  isi  elib  scopus
    6. Gasparov V.A. Audouard A. Drigo L. Rodigin A.I. Lin C.T. Liu W.P. Zhang M. Wang A.F. Chen X.H. Jeevan H.S. Maiwald J. Gegenwart P., “Upper Critical Magnetic Field of Kxfe2-Yse2 and Eu0.5K0.5FE2as2 Single Crystals”, Phys. Rev. B, 87:9 (2013), 094508  crossref  adsnasa  isi  elib  scopus
    7. Arushanov E., Levcenko S., Fuchs G., Drechsler S.-L., “Scaling of the Temperature Dependent Resistivity in 111 Iron-Pnictide Superconductors”, J. Supercond. Nov. Magn, 26:8 (2013), 2727–2734  crossref  isi  elib  scopus
    8. Wolff-Fabris F. Lei H. Wosnitza J. Petrovic C., “Evolution of the Pauli Spin-Paramagnetic Effect on the Upper Critical Fields of Single-Crystalline Kxfe2-Yse2-Zsz”, Phys. Rev. B, 90:2 (2014)  crossref  isi  scopus
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    10. Liu Y., Tanatar M.A., Straszheim W.E., Jensen B., Dennis K.W., McCallum R.W., Kogan V.G., Prozorov R., Lograsso T.A., “Comprehensive Scenario for Single-Crystal Growth and Doping Dependence of Resistivity and Anisotropic Upper Critical Fields in(Ba1-Xkx)FE2as2 (0.22 <= X <= 1)”, Phys. Rev. B, 89:13 (2014), 134504  crossref  adsnasa  isi  elib  scopus
    11. Ramos-Alvarez A., Mosqueira J., Vidal F., Lu X., Luo H., “Large Increase of the Anisotropy Factor in the Overdoped Region of Ba(FE1-Xnix)(2)as-2 as Probed By Fluctuation Spectroscopy”, Supercond. Sci. Technol., 28:7 (2015), 075004  crossref  adsnasa  isi  elib  scopus
    12. Sadakov V A., Romanova T.A., Knyazev D.A., Chareev D.A., Martovitsky V.P., “C-axis Resistivity of Superconductive FeSe Single Crystals: Upper Critical Field and its Angular Behavior”, 20Th International Conference on Magnetism, Icm 2015, Physics Procedia, 75, ed. Labarta A., Elsevier Science BV, 2015, 364–368  crossref  isi  scopus
    13. Sandu V., Suo H.-L., Aldica G., Ionescu A.M., Suo C., Liu Z.-Y., “Possible Enhancement of Spin Fluctuations By Ag Addition To Smfeaso1-X F (X)”, J. Supercond. Nov. Magn, 29:2 (2016), 303–308  crossref  isi  elib  scopus
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