Structure of Carbonic Layer in Ohmic Contacts: Comparison of Silicon Carbide/Carbon and Carbon/Silicide Interfaces

Table 1

Summary of results obtained in the case of top excitation. The range of Raman shift spreads from about 1300 cm⁻¹ to about 1880 cm⁻¹. It corresponds to the position of 𝐷 and 𝐺 bands.

nsc1_2			nsc1_3			nsc1_1			Proposed assignment
Max.; (cm^−1)	FWHM; (cm^−1)	Norm.; Int.	Max.; (cm^−1)	FWHM; (cm^−1)	Norm.; Int.	Max.; (cm^−1)	FWHM; (cm^−1)	Norm.; Int.
1355.3		1.29	1354.5	33.4	1.31	1355.4	29.3	0.68	𝐷 band
	63.2		1362.7	76.1	0.69	1361.4	68.4	0.59	𝐷 band
1533.3	359.9	0.16	—	—	—	—	—	—	𝑎-C
			1581.9	113.2	0.70	1585.7	77.5	0.50	𝐺 band
1602.9	72.9	1.00	1591.2	40.3	1.00	1586.8	26.2	1.00	𝐺 band
			1622.2	22.8	0.36	1619.8	32.4	0.28	Combination of C=C and NiGIC vibrations
—	—	—	1784.0	89.7	0.06	—	—	—	2oTO mode or benzene-related vibrations