硒化亚铁

硒化亚铁是一种无机化合物，化学式为FeSe。^[1]它可由铁和硒的化合反应制备。^[2]

硒化亚铁
IUPAC名 Iron(II) selenide
识别
CAS号	1310-32-3  Y
PubChem	14795
SMILES	[Fe]=[Se]
InChI	1S/Fe.Se
InChIKey	WALCGGIJOOWJIN-UHFFFAOYSA-N
EINECS	215-177-1
性质
化学式	FeSe
摩尔质量	134.81 g·mol⁻¹
外观	黑色晶体
密度	4.72 g/cm3
熔点	965 °C（1238 K）
溶解性（水）	0.975 g/100 mL
结构
晶体结构	六方
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

超导性

β-FeSe 是最简单的铁基超导体，但具有不同的属性。^[3]常压下，它在 8 K以下超导；^[4]但通过嵌入^[3]或在高压下淬火^[5]，它的超导转变温度 (T_c)急剧增加到 38 K，^[6]嵌入和高压淬火的结合会使超导转变温度上升到 48 K。^[3]

2013年有报道称，在SrTiO₃上外延生长的FeSe单原子层具有超导性，铁基超导体的转变温度为 70 K。^[7]这一发现引起了极大的关注，据2014年的报道，该系统的超导转变温度超过 100K。^[8]

参考文献

1. University of Akron Chemical Database^{[永久失效連結]}
2. Gorokh, A. V.; Kabanova, L. M.; Dobosh, V. G. Reaction of iron with selenium at 400-1400°. Doklady Akademii Nauk SSSR, 1966. 169 (3): 639-640.
3. Yu. V. Pustovit; A. A. Kordyuk. Metamorphoses of electronic structure of FeSe-based superconductors (Review article). Low Temp. Phys. 2016, 42 (11): 995. Bibcode:2016LTP....42..995P. S2CID 119184569. arXiv:1608.07751 . doi:10.1063/1.4969896.
4. F.-C. Hsu; et al. Superconductivity in the PbO-type structure α-FeSe. Proc. Natl. Acad. Sci. USA. 2008, 105 (38): 14262–14264. Bibcode:2008PNAS..10514262H. PMC 2531064 . PMID 18776050. arXiv:0807.2369 . doi:10.1073/pnas.0807325105 .
5. Deng, Liangzi; Bontke, Trevor; Dahal, Rabin; Xie, Yu; Gao, Bin; Li, Xue; Yin, Ketao; Gooch, Melissa; Rolston, Donald; Chen, Tong; Wu, Zheng; Ma, Yanming; Dai, Pengcheng; Chu, Ching-Wu. Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals. Proceedings of the National Academy of Sciences. 13 July 2021, 118 (28): e2108938118 [11 July 2021]. PMC 8285973 . PMID 34234019. doi:10.1073/pnas.2108938118. （原始内容存档于2021-07-11）. 已忽略未知参数|pmc-embargo-date= (帮助)
6. Medvedev, S.; McQueen, T. M.; Troyan, I. A.; Palasyuk, T.; Eremets, M. I.; Cava, R. J.; Naghavi, S.; Casper, F.; Ksenofontov, V.; Wortmann, G.; Felser, C. Electronic and Magnetic Phase Diagram of β-Fe_1.01Se with superconductivity at 36.7 K under pressure. Nature Materials. 2009, 8 (8): 630–633. Bibcode:2009NatMa...8..630M. PMID 19525948. arXiv:0903.2143 . doi:10.1038/nmat2491.
7. R. Peng; et al. Enhanced superconductivity and evidence for novel pairing in single-layer FeSe on SrTiO3 thin film under large tensile strain. Physical Review Letters. 2014, 112 (10): 107001. Bibcode:2014PhRvL.112j7001P. PMID 24679321. S2CID 118446521. arXiv:1310.3060 . doi:10.1103/PhysRevLett.112.107001.
8. J.-F. Ge; et al. Superconductivity in single-layer films of FeSe with a transition temperature above 100 K. Nature Materials. 2014, 14 (3): 285–9. Bibcode:2015NatMa..14..285G. PMID 25419814. arXiv:1406.3435 . doi:10.1038/nmat4153.