Pressure dependence of the charge-density-wave and superconducting states in GdTe$_3$, TbTe$_3$ and DyTe$_3$

D. A. Zocco; J. J. Hamlin; K. Grube; J. -H. Chu; H. -H. Kuo; I. R. Fisher; M. B. Maple

doi:10.1103/physrevb.91.205114

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arXiv · 1504.07190

Pressure dependence of the charge-density-wave and superconducting states in GdTe$_3$, TbTe$_3$ and DyTe$_3$

D. A. Zocco·J. J. Hamlin·K. Grube·J. -H. Chu·H. -H. Kuo·I. R. Fisher·M. B. Maple

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Abstract

We present electrical resistivity and ac-susceptibility measurements of GdTe$_3$, TbTe$_3$ and DyTe$_3$ performed under pressure. An upper charge-density-wave (CDW) is suppressed at a rate of $\mathrm{d}T_{\mathrm{CDW,1}}/\mathrm{d}P$ = $-$85 K/GPa. For TbTe$_3$ and DyTe$_3$, a second CDW below $T_{\mathrm{CDW,2}}$ increases with pressure until it reaches the $T_{\mathrm{CDW,1}}$($P$) line. For GdTe$_3$, the lower CDW emerges as pressure is increased above $\sim$ 1 GPa. As these two CDW states are suppressed with pressure, superconductivity (SC) appears in the three compounds at lower temperatures. Ac-susceptibility experiments performed on TbTe$_3$ provide compelling evidence for bulk SC in the low-pressure region of the phase diagram. We provide measurements of superconducting critical fields and discuss the origin of a high-pressure superconducting phase occurring above 5 GPa.

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D. A. Zocco, J. J. Hamlin, K. Grube, J. -H. Chu, H. -H. Kuo, I. R. Fisher, M. B. Maple. 2015-04-27. Pressure dependence of the charge-density-wave and superconducting states in GdTe$_3$, TbTe$_3$ and DyTe$_3$. https://doi.org/10.1103/physrevb.91.205114

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