Giant Negative Linear Compressibility in Orthorhombic Copper Cyanide
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917829454856192 |
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| author | Kesari, Swayam Garg, Alka B. Salke, Nilesh P. Rao, Rekha |
| author_facet | Kesari, Swayam Garg, Alka B. Salke, Nilesh P. Rao, Rekha |
| contents | Most reported negative linear compressibility (NLC) materials exhibit either a small NLC over a large pressure range or a high NLC over a very small pressure range. Here, we report the remarkable discovery of giant NLC in the low-temperature form of CuCN (LT-CuCN) over an unusually large pressure range. High-pressure XRD studies on LT-CuCN observed the NLC of -20.5 TPa-1 along the a-axis at zero pressure, and the ambient orthorhombic phase remained stable up to 9.8 GPa. Pressure and temperature-dependent Raman studies identified the phonon vibrations responsible for NLC and negative thermal expansion (NTE). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_21623 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Giant Negative Linear Compressibility in Orthorhombic Copper Cyanide Kesari, Swayam Garg, Alka B. Salke, Nilesh P. Rao, Rekha Materials Science Most reported negative linear compressibility (NLC) materials exhibit either a small NLC over a large pressure range or a high NLC over a very small pressure range. Here, we report the remarkable discovery of giant NLC in the low-temperature form of CuCN (LT-CuCN) over an unusually large pressure range. High-pressure XRD studies on LT-CuCN observed the NLC of -20.5 TPa-1 along the a-axis at zero pressure, and the ambient orthorhombic phase remained stable up to 9.8 GPa. Pressure and temperature-dependent Raman studies identified the phonon vibrations responsible for NLC and negative thermal expansion (NTE). |
| title | Giant Negative Linear Compressibility in Orthorhombic Copper Cyanide |
| topic | Materials Science |
| url | https://arxiv.org/abs/2410.21623 |