First Order Phase Transition and Superconductivity in BaNi2As2 Single Crystals

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dc.creatorRonning, F.
dc.creatorKurita, N.
dc.creatorBauer, E. D.
dc.creatorScott, B. L.
dc.creatorPark, T.
dc.creatorKlimczuk, T.
dc.creatorMovshovich, R.
dc.creatorThompson, J. D.
dc.date2008-07-24
dc.date2008-08-12
dc.date.accessioned2026-07-07T09:55:50Z
dc.date.available2026-07-07T09:55:50Z
dc.descriptionWe report the synthesis and physical properties of single crystals of stoichiometric BaNi2As2 that crystalizes in the ThCr2Si2 structure with lattice parameters a = 4.112(4) Åand c = 11.54(2) Å. Resistivity and heat capacity show a first order phase transition at T_0 = 130 K with a thermal hysteresis of 7 K. The Hall coefficient is weakly temperature dependent from room temperature to 2 K where it has a value of -4x10^{-10} Ω-cm/Oe. Resistivity, ac-susceptibility, and heat capacity find evidence for bulk superconductivity at T_c = 0.7 K. The Sommerfeld coefficient at T_c is 11.6 \pm 0.9 mJ/molK^2. The upper critical field is anisotropic with initial slopes of dH_{c2}^{c}/dT = -0.19 T/K and dH_{c2}^{ab}/dT = -0.40 T/K, as determined by resistivity.
dc.descriptionPublished version: 4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0807.3788
dc.identifierhttp://arxiv.org/abs/0807.3788
dc.identifierJ. Phys.:Condens. Matter, 20, 342203 (2008)
dc.identifierdoi:10.1088/0953-8984/20/34/342203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/166767
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleFirst Order Phase Transition and Superconductivity in BaNi2As2 Single Crystals
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