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Updated: Sep 8, 2026

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Published on: March 24, 2019
Vacancy Order and Physical Properties of a Ternary Compound Fe0.68Pd0.80Te with an α-Fe1+xTe-Type Structure
Bingxian Shi1,2, Manyu Wang1, Chenglin Shang1,2
1Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), School of Physics, Renmin University of China, Beijing100872, China.
Abstract:
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 Pd-square 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 hole-like charge carriers below room temperature. Our results demonstrate its potentials for further exploring various quantum phenomena.
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