Thermodynamic studies of Cu$_{0.10}$TiSe$_2$ via ac-calorimetry and Hall-probe magnetometry

ORAL

Abstract

TiSe$_{2}$ is a compound with the charge density wave (CDW) transition at 200 K, the CDW state is gradually suppressed when intercalated by copper and for certain amount of Cu superconductivity occurs. We report the studies of the critical fields of an optimally doped sample with a superconducting transition at $T_{\mathrm{c}}$ $\sim$ 3.9 K. Upper critical field $H_{\mathrm{c2}}$ has been derived from the specific heat measurements while the lower critical field $H_{\mathrm{c1}}$ has been extracted from local magnetization measurements using miniature Hall-probes. The temperature dependence of $H_{\mathrm{c2}}$ and $H_{\mathrm{c1}}$ and its anisotropy will be presented. Moreover, local magnetometry using array of 8 Hall-probes shows that vortices after penetration into the sample move towards the centre resulting into a dome-shape induction profile suggesting relatively low pinning.

*This work was supported by the ERDF EU (European Union European regional development fond) grant, under the contract No. ITMS26220120047.

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Authors

  • Zuzana Pribulova

    • Slovak Academy of Sciences
    • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia

  • Jozef Kacmarcik

    • Slovak Academy of Sciences
    • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia

  • Peter Samuely

    • Slovak Academy of Sciences
    • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia

  • Zuzana Medvecka

    • Faculty of Natural Sciences, University of P.J. Safarik, Park Angelinum 9, 040 01 Kosice, Slovakia

  • Viktoria Solteszova

    • Faculty of Natural Sciences, University of P.J. Safarik, Park Angelinum 9, 040 01 Kosice, Slovakia

  • Petra Barancekova Husanikova

    • Drexel University and IEE, Slovak Academy of Sciences
    • Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 84104 Bratislava, Slovakia

  • Vladimir Cambel

    • Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 84104 Bratislava, Slovakia

  • Goran Karapetrov

    • Drexel University
    • Department of Physics, Drexel University, 3141 Chestnut St., Philadelphia, PA 19104, USA