砷化鉭是鉭和砷的化合物，化學式為TaAs。它是第一個被ARPES識別和表徵的拓撲外爾費米子。[3]
砷化鉭在體心四方晶胞中結晶，晶格參數 a = 3.44 Å 和 c = 11.65 Å。它屬於空間群I41md。
砷化鉭是通過在900 °C下分解二砷化鉭製備的。[1]最近的一種製備方法通過使用元素前體和碘作為傳輸劑的化學傳遞反應產生了大的砷化鉭單晶：[2]
- TaI5 (g) + AsI3 (g) ↔ TaAs (s) + 4I2 (g)
參考資料[編輯]
- ^ 1.0 1.1 ((Furuseth, S.)), ((Selte, K.)), ((Kjekshus, A.)), ((Gronowitz, S.)), ((Hoffman, R A.)), ((Westerdahl, A.)). On the Arsenides and Antimonides of Tantalum.. Acta Chemica Scandinavica. 1965, 19: 95–106. ISSN 0904-213X. doi:10.3891/acta.chem.scand.19-0095
.
- ^ 2.0 2.1 ((Li, Z.)), ((Chen, H.)), ((Jin, S.)), ((Gan, D.)), ((Wang, W.)), ((Guo, L.)), ((Chen, X.)). Weyl Semimetal TaAs: Crystal Growth, Morphology, and Thermodynamics. Crystal Growth & Design. 2 March 2016, 16 (3): 1172–1175. ISSN 1528-7505. doi:10.1021/acs.cgd.5b01758.
- ^ ((Xu, S.-Y.)), ((Belopolski, I.)), ((Alidoust, N.)), ((Neupane, M.)), ((Bian, G.)), ((Zhang, C.)), ((Sankar, R.)), ((Chang, G.)), ((Yuan, Z.)), ((Lee, C.-C.)), ((Huang, S.-M.)), ((Zheng, H.)), ((Ma, J.)), ((Sanchez, D S.)), ((Wang, B.)), ((Bansil, A.)), ((Chou, F.)), ((Shibayev, P P.)), ((Lin, H.)), ((Jia, S.)), ((Hasan, M Z.)). Discovery of a Weyl fermion semimetal and topological Fermi arcs. Science. 7 August 2015, 349 (6248): 613–617. ISSN 1095-9203. PMID 26184916. S2CID 206636457. arXiv:1502.03807 . doi:10.1126/science.aaa9297.
