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Evidence for superconductivity in Rb metal above 55 GPa pressure

机译:RB金属中超导性高于55GPA压力的证据

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摘要

The only alkali metal known to be superconducting at ambient pressure is Li at 0.4 mK. Under 30 GPa pressure T-c for Li rises to 14 K. In addition, nearly 50 years ago the heavy alkali metal Cs was reported to become superconducting near 1.3 K at 12 GPa. In the present experiment the superconductivity of Cs under pressure is confirmed. In addition, strong evidence is presented in electrical resistivity measurements that neighboring Rb also becomes superconducting near 2 K at 55 GPa as it enters the oC16 phase, as for Cs, where T-c decreases under the application of pressure. It would seem likely that under the right temperature/pressure conditions all alkali metals, including metallic hydrogen, will join the ranks of the superconducting elements. With the addition of Rb, 55 of the 92 naturally occurring elements are superconducting at ambient or high pressure.
机译:已知在环境压力下唯一一种超导的碱金属是Li在0.4 mk。对于Li的30GPa压力T-C下降至14k。此外,近50年前报告了重型碱金属Cs,在12GPa下变为超导。在本实验中,证实了CS在压力下的超导性。此外,在电阻率测量中提出了强大的证据,即相邻的Rb在55GPa下也使得近2k的超导,因为它进入OC16相,如CS,其中T-C在压力下减小。似乎在正确的温度/压力条件下,所有碱金属(包括金属氢)都将加入超导元件的等级。随着RB的加入,92个天然存在的元件中的55个在环境或高压下是超导。

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  • 来源
    《Physical review》 |2019年第4期|041109.1-041109.5|共5页
  • 作者单位

    Washington Univ Dept Phys St Louis MO 63130 USA;

    Washington Univ Dept Phys St Louis MO 63130 USA;

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