High pressure study of the normal and superconducting states of the layered pnictide oxide Ba$_{1-x}$Na$_x$Ti$_2$Sb$_2$O with x = 0, 0.10, and 0.15

M. Gooch; P. Doan; B. Lorenz; Z. J. Tang; A. M. Guloy; C. W. Chu

doi:10.1088/0953-2048/26/12/125011

paper

High pressure study of the normal and superconducting states of the layered pnictide oxide Ba $_{1 - x}$ Na $_{x}$ Ti $_{2}$ Sb $_{2}$ O with x = 0, 0.10, and 0.15

arXiv:1308.5930 · doi:10.1088/0953-2048/26/12/125011

Abstract

Here we present a systematic study of the effects of pressure on the superconducting and spin/charge density wave (SDW/CDW) transitions of Ba $_{1 - x}$ Na $_{x}$ Ti $_{2}$ Sb $_{2}$ O (x = 0, 0.10, and 0.15) by means of resistivity measurements. For x = 0 and 0.10, external pressure results in a decease of the SDW/CDW transition temperature T $_{c}$ ; however, no measurable change is observed for the x = 0.15. The pressure effect on the superconducting transition temperature is different for all three samples. For BaTi $_{2}$ Sb $_{2}$ O (x=0), T $_{c}$ increases significantly from 1.2 K at zero pressure to $\sim$ 2.9 K at 16.1 kbars. The 10 % Na-doped sample shows an initial T $_{c}$ increase up to 4.2 K with pressure which saturates at higher pressure values. For higher Na concentrations (x=0.15), T $_{c}$ continuously decreases with increasing pressure.

9 pages, 4 figures

High pressure study of the normal and superconducting states of the layered pnictide oxide Ba $_{1 - x}$ Na $_{x}$ Ti $_{2}$ Sb $_{2}$ O with x = 0, 0.10, and 0.15

Abstract

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High pressure study of the normal and superconducting states of the layered pnictide oxide Ba1−x​Nax​Ti2​Sb2​O with x = 0, 0.10, and 0.15

Abstract

References in corpus (11)

Cited by in corpus (4)

High pressure study of the normal and superconducting states of the layered pnictide oxide Ba $_{1 - x}$ Na $_{x}$ Ti $_{2}$ Sb $_{2}$ O with x = 0, 0.10, and 0.15