APS -APS March Meeting 2017 - Event - Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe and Fe(Se,S)

A. E. B#034; ohmer; V. Taufour; L. Xiang; U. S. Kaluarachchi; M. A. Tanatar; B. G. Ueland; A. Kreyssig; W. E. Straszheim; T. Wolf; R. Prozorov; A. I. Goldman; S. L. Bud{#039; }ko; P. C. Canfield

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APS -APS March Meeting 2017 - Event - Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe and Fe(Se,S)

机译：APS -APS 3月会议2017年 - 蒸汽生长的FESE和FE的过渡温度和残余电阻率比的变化 - FEERS（SE，S）

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We report on the vapor growth and physical properties of single-crystalline FeSe and Fe(Se,S). Significant variations of sample morphology resulting from slight modifications of the growth conditions are observed. The superconducting transition temperature, $T_{mathrm c}$, of different FeSe samples varies between 8.8 K and 3 K, and the structural transition temperature, $T_{mathrm s}$, varies between 90 K and 72 K, respectively. We find that those variations cannot be correlated with the sample composition, measured by WDS. Instead, we point out a clear correlation between $T_{mathrm s}$, $T_{mathrm c}$ and disorder, as measured by the residual resistivity ratio. Notably, $T_{mathrm s}$ and $T_{mathrm c}$ are linearly correlated with each otherfootnote{B"ohmer et al., PRB 94, 024526 (2016).}. On the other hand, a small amount of sulfur-substitution suppresses $T_{mathrm s}$ but enhances $T_{mathrm c}$. We will compare and discuss the effects of various perturbations---disorder, chemical substitution and hydrostatic pressure---on the transition temperatures and properties of FeSe.

机译：我们报告单晶FESE和Fe（SE，S）的蒸汽生长和物理性质。观察到由微小修饰产生生长条件产生的样本形态的显着变化。超导转变温度，不同FEES样品的T_ {MATHRM C} $，在8.8 k和3 k之间变化，结构过渡温度$ t_ {mathrm s $，分别在90 k和72 k之间变化。我们发现这些变型不能与由WDS测量的样品组成相关联。相反，我们指出了$ t_ {mathrm s} $，$ t_ {mathrm c} $和紊乱之间的明确相关性，通过剩余电阻率比测量。值得注意的是，$ t_ {mathrm s} $和$ t_ {mathrm c} $与彼此线性相关，{b“ohmer等，prb 94,024526（2016）。}。另一方面，少量硫磺替换抑制$ t_ {mathrm s} $但增强$ t_ {mathrm c} $。我们将比较和讨论各种扰动的影响---紊乱，化学取代和静水压力---在过渡温度和性质上Fese。

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《Bulletin of the American Physical Society》 |2017年第4期|共页
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A. E. B#034; ohmer; V. Taufour; L. Xiang; U. S. Kaluarachchi; M. A. Tanatar; B. G. Ueland; A. Kreyssig; W. E. Straszheim; T. Wolf; R. Prozorov; A. I. Goldman; S. L. Bud{#039; }ko; P. C. Canfield;
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机译：转变温度和残余电阻率的变化气相生长的Fese

APS -APS March Meeting 2017 - Event - Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe and Fe(Se,S)

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