Electronic, Elastic, Optical, and Thermodynamic Properties Study of Ytterbium Chalcogenides Using Density Functional Theory

Table 4

Mechanical parameters of ytterbium chalcogenides.

Mechanical property	Compound			Reference
	YbS	YbSe	YbTe
Bulk modulus (GPa)	51.30	42.04	34.21	Present study
				Experiment [23]
Young’s modulus (GPa)	97.66	81.61	60.44	Present study
	97.83	92.73	113.75	Experiment [27]
Shear modulus (GPa)	41.31	34.71	25.11	Present study
	31	27.16	34.48	Experiment [27]
Poisson’s ratio	0.18	0.17	0.20	Present study
	0.23	0.18	0.09	Experiment [27]
Debye sound velocity (m/s)	2611.18	2249.85	1926.92	—
Debye temperature (K)	270.62	226.43	181.60	—