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Illustrates the relationship between stress (GPa) and strain (%) under tensile conditions for both penta-PdS2 (a) and penta-PdSe2 (b) (reprinted with permission from Ref. [39], copyright 2022, Springer Nature). (c) Schematic diagram of the EL measuring device (reprinted with permission from Ref. [43], copyright 2018, Elsevier).
