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Pressure-induced reentrant metallic phase in lithium

机译:锂中压力诱导的折返金属相

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摘要

We report the metal (0-80 GPa)-semiconductor (oC40, 80-120 GPa)-metal (oC24, >120 GPa) transitions of lithium under compression, as observed through simultaneous electrical resistance and x-ray diffraction measurements. The energy gap in the oC40 semiconductor quickly decreases with applied pressure, and Li reverts back to a metallic state accompanied by a structural transition to oC24. The large p value for oC24 indicates that this re-entrant metallic phase is a so-called "poor metal." Our results reveal a characteristic phase diagram that demonstrates the existence of a semiconductor phase between two distinct metallic phases.
机译:我们报告了在压缩下锂的金属(0-80 GPa)-半导体(oC40,80-120 GPa)-金属(oC24,> 120 GPa)转变,通过同时进行的电阻和X射线衍射测量观察到。 oC40半导体中的能隙随着施加的压力而迅速减小,Li还原为金属态,伴随结构向oC24的转变。 oC24的p值较大,表明该凹角金属相是所谓的“贫金属”。我们的结果揭示了一个特征相图,该相图证明了两种不同金属相之间存在半导体相。

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  • 来源
    《Physical review》 |2014年第14期|144103.1-144103.5|共5页
  • 作者单位

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

    Japan Synchrotron Radiation Research Institute (JASRI)ISPring-8, Hyogo 679-5198, Japan;

    Japan Synchrotron Radiation Research Institute (JASRI)ISPring-8, Hyogo 679-5198, Japan;

    Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    pressure effects; superconductivity phase diagrams; electronic structure;

    机译:压力影响;超导相图;电子结构;

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