Electronic structure of transition metal dichalcogenides PdTe2 and Cu0.05PdTe2 superconductors obtained by angle-resolved photoemission spectroscopy<xref ref-type="fn" rid="cpb150943fn1">*</xref>

Electronic structure of transition metal dichalcogenides PdTe₂ and Cu_0.05PdTe₂ superconductors obtained by angle-resolved photoemission spectroscopy*

Liu Yan^a), Zhao Jian-Zhou^a), Yu Li^a), Lin Cheng-Tian^b), Hu Cheng^a), Liu De-Fa^a), Peng Ying-Ying^a), Xie Zhuo-Jin^a), He Jun-Feng^a), Chen Chao-Yu^a), Feng Ya^a), Yi He-Mian^a), Liu Xu^a), Zhao Lin^a), He Shao-Long^a), Liu Guo-Dong^a), Dong Xiao-Li^a), Zhang Jun^a), Chen Chuang-Tian^c), Xu Zu-Yan^c), Weng Hong-Ming^a), Dai Xi^a), Fang Zhong^a), Zhou Xing-Jiang^a),^d)†

Band structure comparison between PdTe₂ and Cu_0.05PdTe₂ by using hellium I (21.218 eV) and laser (6.994 eV) as the photon source. (a)–(c) Band structures of PdTe₂ measured by He I along three high symmetry cuts 1–3. (d)–(f) Band structures of Cu_0.05PdTe₂ along three high symmetry cuts 1–3. (g) and (h) Band structure of PdTe₂ measured by laser along two high symmetry cuts 4 and 5. (i) and (j) Band structure of Cu_0.05PdTe₂ measured along two high symmetry cuts 4 and 5. The locations of the five momentum cuts 1–5 are shown in panel (k). To highlight the measured bands, all the images shown here are the second-derivative images of the original data with respect to the energy. Panel (l) shows the energy distribution curves (EDCs) of Cu_0.05PdTe₂ and PdTe₂ at the Γ point in panels (a)–(c) and (f) from the helium I measurements. Panel (m) shows the extracted EDCs of Cu_0.05PdTe₂ and PdTe₂ at the Γ point in panels (g)–(j) from the laser-ARPES measurement. The vertical bars indicate the peak position in EDCs. Panel (n) shows the momentum distribution curves (MDCs) at the Fermi level of panels (g)–(j). The fitted MDC lines are put on top of the measured data and the obtained Fermi momentum difference is marked.