Epitaxial fabrication of monolayer copper arsenide on Cu(111)

Zhang Shuai¹, Song Yang¹, Li Jin Mei², Wang Zhenyu¹, Liu Chen², Wang Jia-Ou², Gao Lei³, Lu Jian-Chen³, Zhang Yu Yang^{1, 4}, Lin Xiao^{1, 4, †}, Pan Jinbo^{1, ‡}, Du Shi Xuan^{1, 4}, Gao Hong-Jun^{1, 4, §}

ARPES data and DFT calculated band structure of monolayer CuAs on Cu(111) substrate. (a) Energy–momentum dispersion along M–Γ–K direction in the hexagonal Brillouin zone. (b) Second-derivative spectrum of the raw ARPES data in (a). The overlaid lines mark the two bands. (c) First principle calculated band structure for monolayer CuAs on Cu(111).