Crystal growth, structure and physical properties of quasi-one-dimensional tellurides Fe$_{4-x}$VTe$_{4-y}$ ($x=1.01$, $y=0.74$) and V$_{4.64}$Te$_4$
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| Format: | Preprint |
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2025
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| _version_ | 1866917987821289472 |
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| author | Sun, S. N. Xu, D. Y. Shang, C. L. Shi, B. X. Huang, J. L. Gui, X. J. Sun, Z. C. Liu, J. J. Wang, J. C. Zhang, H. X. Cheng, P. |
| author_facet | Sun, S. N. Xu, D. Y. Shang, C. L. Shi, B. X. Huang, J. L. Gui, X. J. Sun, Z. C. Liu, J. J. Wang, J. C. Zhang, H. X. Cheng, P. |
| contents | A new ternary compound Fe$_{4-x}$VTe$_{4-y}$ ($x=1.01$, $y=0.74$) with Ti5Te4-type structure is identified. Fe and V atoms tend to occupy different crystallographic positions and form quasi-one-dimensional (quasi-1D) Fe-V chains along the c-axis. Millimeter-sized single crystal of Fe$_{2.99}$VTe$_{3.26}$ (FVT) with slender-stick shape could be grown by chemical vapor transport method which reflects its quasi-1D crystal structure. Magnetization measurements reveal that FVT orders antiferromagnetically below T$_N$=93 K with strong easy ab-plane magnetic anisotropy. Although a weak glassy-like behavior appears below 10 K, FVT is dominant by long-range antiferromagnetic order in contrast to the spin-glass state in previously reported isostructural Fe$_{5}$Te$_{4}$. We also synthesize V$_{4.64}$Te$_4$ with similar quasi-1D V-chains and find it has weak anomalies at 144 K on both resistivity and susceptibility curves. However, no clear evidence is found for the development of magnetic or charge order. X-ray photoelectron spectroscopy and Curie-Weiss fit reveal that the effective moments for Fe$^{2+}$ and V$^{4+}$ in both compounds have large deviations from the conventional local moment model, which may possibly result from the formation of Fe/V metal-metal bondings. Furthermore the resistivity of both FVT and V$_{4.64}$Te$_4$ exhibits semiconducting-like temperature-dependent behavior but with average values close to typical bad metals, which resembles the transport behavior in the normal state of Fe-based superconductors. These quasi-1D compounds have shown interesting physical properties for future condensed matter physics research. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12630 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Crystal growth, structure and physical properties of quasi-one-dimensional tellurides Fe$_{4-x}$VTe$_{4-y}$ ($x=1.01$, $y=0.74$) and V$_{4.64}$Te$_4$ Sun, S. N. Xu, D. Y. Shang, C. L. Shi, B. X. Huang, J. L. Gui, X. J. Sun, Z. C. Liu, J. J. Wang, J. C. Zhang, H. X. Cheng, P. Strongly Correlated Electrons Materials Science Superconductivity A new ternary compound Fe$_{4-x}$VTe$_{4-y}$ ($x=1.01$, $y=0.74$) with Ti5Te4-type structure is identified. Fe and V atoms tend to occupy different crystallographic positions and form quasi-one-dimensional (quasi-1D) Fe-V chains along the c-axis. Millimeter-sized single crystal of Fe$_{2.99}$VTe$_{3.26}$ (FVT) with slender-stick shape could be grown by chemical vapor transport method which reflects its quasi-1D crystal structure. Magnetization measurements reveal that FVT orders antiferromagnetically below T$_N$=93 K with strong easy ab-plane magnetic anisotropy. Although a weak glassy-like behavior appears below 10 K, FVT is dominant by long-range antiferromagnetic order in contrast to the spin-glass state in previously reported isostructural Fe$_{5}$Te$_{4}$. We also synthesize V$_{4.64}$Te$_4$ with similar quasi-1D V-chains and find it has weak anomalies at 144 K on both resistivity and susceptibility curves. However, no clear evidence is found for the development of magnetic or charge order. X-ray photoelectron spectroscopy and Curie-Weiss fit reveal that the effective moments for Fe$^{2+}$ and V$^{4+}$ in both compounds have large deviations from the conventional local moment model, which may possibly result from the formation of Fe/V metal-metal bondings. Furthermore the resistivity of both FVT and V$_{4.64}$Te$_4$ exhibits semiconducting-like temperature-dependent behavior but with average values close to typical bad metals, which resembles the transport behavior in the normal state of Fe-based superconductors. These quasi-1D compounds have shown interesting physical properties for future condensed matter physics research. |
| title | Crystal growth, structure and physical properties of quasi-one-dimensional tellurides Fe$_{4-x}$VTe$_{4-y}$ ($x=1.01$, $y=0.74$) and V$_{4.64}$Te$_4$ |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2504.12630 |