Universal behavior of the in-plane resistivity is observed in the normal state of underdoped TmBa2Cu3Ox single crystals. In the region 6.37 < x < 6.71 the dependencies of the resistivity derivative on temperature and oxygen content, ρ′(T, x), can be presented as a universal function of single dimensionless argument T/T*(x). A single electron transport mechanism and a single energy scale in the investigated area of the phase diagram are necessary for the appearance of such scaling effect. In the low-temperature region the behavior of the universal curve is close to exponential ρ′ = ρ′max(A + B exp( -T*/T)). This fact may point to an important role of pseudogap or spin gap effects in transport properties of the cuprate systems.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering