三元化合物Fe0.68Pd0.80Te的空位有序性及其物理性质（具有α-Fe1+xTe型结构）
Vacancy Order and Physical Properties of a Ternary Compound Fe0.68Pd0.80Te with an α-Fe1+xTe-Type Structure
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中文总结 AI 辅助
本文报道了具有α-Fe1+xTe型结构的新化合物Fe0.68Pd0.80Te，其特征为Pd方形网格和3×3×3空位有序，呈现自旋玻璃基态及小于10 meV的极窄带隙半导体行为，为探索量子现象提供了潜力。
中文摘要 AI 辅助
我们报道了一种具有α-Fe1+xTe原型结构的新化合物Fe0.68Pd0.80Te的鉴定与表征。与Fe1+xTe中Fe方形网格及间隙Fe位点的少量占据不同，Fe0.68Pd0.80Te的特征在于Pd方形网格及相应间隙Fe位点接近68%的占据率。此外，非接触原子力显微镜和X射线衍射为该层状材料中3×3×3 Pd空位有序的存在提供了证据。通过磁性表征，我们识别出在Tg≈40 K以下的自旋玻璃基态。电输运测量表明，Fe0.68Pd0.80Te是一种带隙小于10 meV的极窄带隙半导体。在室温以下，它具有弱的负磁电阻和空穴型电荷载流子。我们的结果证明了其进一步探索各种量子现象的潜力。
英文摘要
We report the identification and characterization of a new compound Fe0.68Pd0.80Te with an α-Fe1+xTe prototype structure. Different from the Fe-square net and minor occupancy of interstitial Fe-sites in Fe1+xTe, Fe0.68Pd0.80Te is featured by a Pdsquare net and near 68% occupancy of the corresponding interstitial Fe-sites. Furthermore, noncontact atomic force microscopy and X-ray diffraction provide evidence for the existence of a 3*3*3 Pd-vacancy order in this layered material. A spin-glass ground state below Tg 40 K is identified via magnetic characterization. Electrical transport measurements show that Fe0.68Pd0.80Te is a semiconductor with a very small band gap below 10 meV. It has weak negative magnetoresistance and holelike charge carriers below room temperature. Our results demonstrate its potentials for further exploring various quantum phenomena.
