Systematic Evolution of the Magnetotransport Properties of Bi_{2}Sr_{2-x}La_{x}CuO_{6} with Carrier Concentration

TL;DR

This study systematically investigates how the magnetotransport properties of La-doped Bi-2201 evolve with carrier concentration, revealing behaviors consistent with other cuprates and identifying pseudogap features.

Contribution

It provides a comprehensive analysis of high-quality La-doped Bi-2201 crystals, demonstrating their transport properties and pseudogap behavior across doping levels, challenging previous beliefs about their disorder.

Findings

Normal-state transport properties align with other cuprates

Pseudogap features observed in underdoped samples

Resistivity shows T^n dependence in overdoped region

Abstract

We report that it is possible to obtain a series of high-quality crystals of La-doped Bi-2201, of which the transport properties have been believed to be "dirtier" than those of other cuprates. In our crystals, the normal-state transport properties display behaviors which are in good accord with other cuprates; for example, in the underdoped region the in-plane resistivity \rho_{ab} shows the pseudogap feature and in the overdoped region the T dependence of \rho_{ab} changes to T^n with n > 1. The characteristic temperatures of the pseudogap deduced from the resistivity and the Hall coefficient data are presented.