Nonlinear Elasticity of Borocarbide Superconductor YNi₂B₂C: A First-Principles Study

Table 3

Second-order elastic constants (GPa) of tetragonal YNi₂B₂C at 0 K and 0 GPa, in comparison with the previous calculations and available experimental measurements.

Ref. number	Methods
Present	VASP ultrasoft GGA	282.60	147.22	135.68	269.91	62.33	140.68
[3]	CASTEP GGA and OTF	292.7	133.6	138.6	282.4	68.6	129.8
[7]	Exp. (RUS, 300 K)	294.6	157.7	125.6	261.5	64.4	142.1
	Exp. (time-of-flight, 300 K)	284.7	145.7	—	—	67.1	143.3
	Exp. (time-of-flight, 2 K)	292	149.8	—	—	67.4	132
[8]	Exp. (time-of-flight, 14.2 K)	222	102	—	212	54.5	131

Calculated from the quoted values of and [8].