Investigating structure and physical properties of quaternary layered transition metal oxide Na2Cu2TeO6
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| Format: | Preprint |
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2025
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| _version_ | 1866908498969755648 |
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| author | Patil, Shubham Kaushik, S. D. |
| author_facet | Patil, Shubham Kaushik, S. D. |
| contents | We investigated the crystal structure, magnetic behavior, and optical properties of the layered honeycomb compound Na2Cu2TeO6. X-ray and neutron diffraction confirmed a monoclinic structure, with Cu ions arranged in dimerized chains. Magnetic susceptibility measurements yielded a Curie-Weiss temperature significantly lower than the expected spin-only value, indicating the presence of strong antiferromagnetic interactions and enhanced quantum fluctuations. A broad maximum near 160 K in the susceptibility data is consistent with short-range one-dimensional antiferromagnetic correlations. Magnetization measurements showed negligible coercivity, and specific heat data revealed no anomalies down to 3 K. Temperature-dependent neutron diffraction showed no evidence of long-range magnetic order. Optical absorption studies using UV-Visible spectroscopy displayed a sharp absorption edge in the UV region. Tauc analysis estimated a direct optical band gap of approximately 2.10 eV, with no clear indication of an indirect transition. These observations provide insight into the interplay between structural distortions, low-dimensional magnetism, and optical behavior in Na2Cu2TeO6 |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_16219 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Investigating structure and physical properties of quaternary layered transition metal oxide Na2Cu2TeO6 Patil, Shubham Kaushik, S. D. Strongly Correlated Electrons We investigated the crystal structure, magnetic behavior, and optical properties of the layered honeycomb compound Na2Cu2TeO6. X-ray and neutron diffraction confirmed a monoclinic structure, with Cu ions arranged in dimerized chains. Magnetic susceptibility measurements yielded a Curie-Weiss temperature significantly lower than the expected spin-only value, indicating the presence of strong antiferromagnetic interactions and enhanced quantum fluctuations. A broad maximum near 160 K in the susceptibility data is consistent with short-range one-dimensional antiferromagnetic correlations. Magnetization measurements showed negligible coercivity, and specific heat data revealed no anomalies down to 3 K. Temperature-dependent neutron diffraction showed no evidence of long-range magnetic order. Optical absorption studies using UV-Visible spectroscopy displayed a sharp absorption edge in the UV region. Tauc analysis estimated a direct optical band gap of approximately 2.10 eV, with no clear indication of an indirect transition. These observations provide insight into the interplay between structural distortions, low-dimensional magnetism, and optical behavior in Na2Cu2TeO6 |
| title | Investigating structure and physical properties of quaternary layered transition metal oxide Na2Cu2TeO6 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.16219 |