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Theoretical investigation of FeTe magnetic ordering under hydrostatic pressure

机译:静水压力下FeTe磁有序性的理论研究

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摘要

We investigate the pressure phase diagram of FeTe, predicting structural and magnetic properties in the normal state at zero temperature within density functional theory. We carefully examined several possible different crystal structures over a pressure range up to ≈30 GPa: simple tetragonal (PbO type), simple monoclinic, orthorhombic (MnP type), hexagonal (NiAs and wurzite type), and cubic (CsCl and NaCl type). We predict pressure to drive the system through different magnetic ordering (notably also some ferromagnetic phases), eventually suppressing magnetism at around 17 GPa. We speculate the ferromagnetic order to be the reason for the absence of a superconducting phase in FeTe at variance with the case of FeSe.
机译:我们研究了FeTe的压力相图,根据密度泛函理论预测了零温度下正常状态下的结构和磁性。我们仔细研究了在高达≈30GPa的压力范围内的几种可能的不同晶体结构:简单的四方(PbO型),简单的单斜晶,正交晶(MnP型),六角形(NiAs和纤锌矿型)和立方(CsCl和NaCl型) 。我们预测通过不同的磁序(特别是某些铁磁相)驱动系统的压力,最终将磁抑制在17 GPa左右。我们推测铁磁有序是FeTe中不存在超导相(与FeSe情况不同)的原因。

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  • 来源
    《Physical review》 |2013年第9期|094516.1-094516.7|共7页
  • 作者单位

    Dipartimento di Scienze Fisiche, Universita degli Studi di Cagliari, Cittadella Universitaria, I-09042 Monserrato (CA), Italy ,CNR-IOM (UOS Cagliari), Cittadella Universitaria, I-09042 Monserrato (CA), Italy;

    Dipartimento di Scienze Fisiche, Universita degli Studi di Cagliari, Cittadella Universitaria, I-09042 Monserrato (CA), Italy ,CNR-IOM (UOS Cagliari), Cittadella Universitaria, I-09042 Monserrato (CA), Italy;

    Dipartimento di Scienze Fisiche e Chimiche, Universita degli Studi dell’ Aquila, Via Vetoio 10,I-67100 Coppito, L'Aquila, Italy ,CNR-SP1N, Via Vetoio n. 10,I-67100 Coppito, L'Aquila, Italy;

    Dipartimento di Scienze Fisiche, Universita degli Studi di Cagliari, Cittadella Universitaria, I-09042 Monserrato (CA), Italy ,CNR-IOM (UOS Cagliari), Cittadella Universitaria, I-09042 Monserrato (CA), Italy;

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

    pressure effects;

    机译:压力效应;

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