The ITR, which is sometimes also referred to as the Kapitza resistance, or thermal boundary resistance, is a measure of the resistance to heat flow between two dissimilar materials. It is a crucial factor in understanding heat transfer across material interfaces. The ITR results in a temperature discontinuity where the two materials meet, arising from the contrasting electronic and vibrational properties of the two materials. The ITR, or its inverse, interfacial thermal conductance (ITC), is given by the equation: