Magnetism and Correlated Electrons in LaCr$_2$Ge$_2$N
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918362890633216 |
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| author | Meng, Jiao-Jiao Xiao, Yu-Sen Li, Gen Liu, Shao-Hua Li, Bai-Zhuo Jiang, Hao Yu, Zhen Lin, Yi-Qiang Zhao, Xin-Yu Duan, Qing-Chen Yang, Wu-Zhang Zhao, Chong-Yao Ren, Zhi Mei, Yu-Xue Chen, Yong-Liang Zhong, Rui-Dan Dong, Qing-Xin Yang, Peng-Tao Tan, Shu-Gang Wang, Bo-Sen Luo, Huiqian Cheng, Jin-Guang Ming, Xue Wang, Cao Cao, Guang-Han |
| author_facet | Meng, Jiao-Jiao Xiao, Yu-Sen Li, Gen Liu, Shao-Hua Li, Bai-Zhuo Jiang, Hao Yu, Zhen Lin, Yi-Qiang Zhao, Xin-Yu Duan, Qing-Chen Yang, Wu-Zhang Zhao, Chong-Yao Ren, Zhi Mei, Yu-Xue Chen, Yong-Liang Zhong, Rui-Dan Dong, Qing-Xin Yang, Peng-Tao Tan, Shu-Gang Wang, Bo-Sen Luo, Huiqian Cheng, Jin-Guang Ming, Xue Wang, Cao Cao, Guang-Han |
| contents | We report the synthesis, structure and physical properties of a new quaternary nitride LaCr$_2$Ge$_2$N. The compound crystallizes in the CeCr$_2$Si$_2$C-type structure (P4/mmm), featuring distinctive Cr$_2$N square sheets within Cr$_2$Ge$_2$N block layers. Physical characterizations reveal enhanced electron correlations evidenced by a Sommerfeld coefficient substantially larger than band calculations and pressure-induced deviation from Fermi-liquid behavior. Magnetic measurements show short-range antiferromagnetic correlations developing around 460 K, followed by long-range magnetic ordering at 14 K. Additionally, subtle anomalies at 378 K suggest possible electronic ordering. First-principles calculations reveal nearly-flat Cr-3d bands near the Fermi level and predict a striped antiferromagnetic ground state. This work demonstrates how electron count variation in the CeCr$_2$Si$_2$C-type structure family leads to magnetic ordering in LaCr$_2$Ge$_2$N, contrasting with the paramagnetic behavior of LnCr$_2$Si$_2$C compounds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_20843 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetism and Correlated Electrons in LaCr$_2$Ge$_2$N Meng, Jiao-Jiao Xiao, Yu-Sen Li, Gen Liu, Shao-Hua Li, Bai-Zhuo Jiang, Hao Yu, Zhen Lin, Yi-Qiang Zhao, Xin-Yu Duan, Qing-Chen Yang, Wu-Zhang Zhao, Chong-Yao Ren, Zhi Mei, Yu-Xue Chen, Yong-Liang Zhong, Rui-Dan Dong, Qing-Xin Yang, Peng-Tao Tan, Shu-Gang Wang, Bo-Sen Luo, Huiqian Cheng, Jin-Guang Ming, Xue Wang, Cao Cao, Guang-Han Strongly Correlated Electrons We report the synthesis, structure and physical properties of a new quaternary nitride LaCr$_2$Ge$_2$N. The compound crystallizes in the CeCr$_2$Si$_2$C-type structure (P4/mmm), featuring distinctive Cr$_2$N square sheets within Cr$_2$Ge$_2$N block layers. Physical characterizations reveal enhanced electron correlations evidenced by a Sommerfeld coefficient substantially larger than band calculations and pressure-induced deviation from Fermi-liquid behavior. Magnetic measurements show short-range antiferromagnetic correlations developing around 460 K, followed by long-range magnetic ordering at 14 K. Additionally, subtle anomalies at 378 K suggest possible electronic ordering. First-principles calculations reveal nearly-flat Cr-3d bands near the Fermi level and predict a striped antiferromagnetic ground state. This work demonstrates how electron count variation in the CeCr$_2$Si$_2$C-type structure family leads to magnetic ordering in LaCr$_2$Ge$_2$N, contrasting with the paramagnetic behavior of LnCr$_2$Si$_2$C compounds. |
| title | Magnetism and Correlated Electrons in LaCr$_2$Ge$_2$N |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2512.20843 |