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- W1823609969 abstract "We report on the synthesis and the physical properties of Ba1-xRbxTi2Sb2O (x < 0.4) by x-ray diffraction, SQUID magnetometery, resistivity and specific heat measurements. Upon hole doping by substituting Ba with Rb, we find superconductivity with a maximum Tc = 5.4 K. Simultaneously, the charge-density-wave (CDW) transition temperature is strongly reduced from T_CDW 55 K in the parent compound BaTi2Sb2O and seems to be suppressed for x > 0.2. The bulk character of the superconducting state for the optimally doped sample (x = 0.2) is confirmed by the occurrence of a well developed discontinuity in the specific heat at Tc, with DeltaC/Tc = 22 mJ/mol K2, as well as a large Meissner-shielding fraction of approximately 40 %. The lower and the upper critical fields of the optimally doped sample (x = 0.2) are estimated to mu0Hc1(0) = 3.8 mT and mu0Hc2(0) = 2.3 T, respectively, indicating that these compounds are strongly type-II superconductors." @default.
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- W1823609969 date "2014-03-07" @default.
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- W1823609969 title "Superconductivity in rubidium-substituted Ba<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>Rb<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mrow /><mml:mi>x</mml:mi></mml:msub></mml:math>Ti<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>Sb<mml:math xmlns:mml=http://www.w3.…" @default.
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- W1823609969 doi "https://doi.org/10.1103/physrevb.89.094505" @default.
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