Weak localization competes with the quantum oscillations in a natural electronic superlattice: The case of Na-1.(5)(PO2)(4)(WO3)(20)
2020
Abstract
We report an investigation of the combined structural and electronic properties of the bronze Na-1.5(PO2)(4)(WO3)(20). Its low-dimensional structure and possible large reconstruction of the Fermi surface due to charge density wave instability make this bulk material a natural superlattice with a reduced number of carriers and Fermi energy.
Signatures of multilayered two-dimensional (2D) electron weak localization are consequently reported, with an enhanced influence of quantum oscillations. A crossover between these two antagonistic entities, previously observed only in genuine low-dimensional materials and devices, is shown to occur in a bulk crystal due to its hidden 2D nature.