Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-δ}$

Masayoshi Kuwabara; Michiaki Matsukawa; Keisuke Sugawara; Haruka Taniguchi

doi:10.7566/JPSJ.85.124704

paper

Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$

arXiv:1609.00125 · doi:10.7566/JPSJ.85.124704

Abstract

To examine the electronic phase diagram of superconducting CuO double chains, we report the effect of external pressure on the magneto-transport properties in superconducting and non-superconducting polycrystalline samples of Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$ at low temperatures (1.8-40 K) under various magnetic fields (up to 14 T). In the as-sintered non-superconducting sample, the magneto-resistance (MR) follows a power law of $H^{3/2}$ at low temperatures, which is in no agreement with the $H^{2}$ dependence of MR in the PrBa $_{2}$ Cu $_{4}$ O $_{8}$ system. The negative pressure dependence of the superconducting phase is qualitatively consistent with a theoretical prediction on the basis of the Tomonaga-Luttinger Liquid theory. The 48-h-reduced superconducting sample at ambient pressure exhibits no clear increase in MR for $T > T_{c, o n} = 26.5$ K. In contrast, with the application of pressure to the superconducting sample, the MR effects reappear and are also well fitted by $H^{3/2}$ . The model of slightly warped Fermi surfaces explains not only the MR effect of the non-superconducting sample, but is also related to the reasons for the pressure-induced MR phenomena of the superconducting sample.

8 pages, 8 figures. arXiv admin note: text overlap with arXiv:1512.01300

Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$

Abstract

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Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound Pr2​Ba4​Cu7​O15−δ​

Abstract

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Cited by in corpus (4)

Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound Pr $_{2}$ Ba $_{4}$ Cu $_{7}$ O $_{15 - δ}$