Electron-Hole Asymmetry in GdBaCo2O5+x: Evidence for Spin Blockade of Electron Transport in a Correlated Electron System
A. A. Taskin, Yoichi Ando
Abstract
In RBaCo2O5+x compounds (R is rare earth) variability of the oxygen content allows precise doping of CoO2 planes with both types of charge carriers. We study transport properties of doped GdBaCo2O5+x single crystals and find a remarkable asymmetry in the behavior of holes and electrons doped into a parent insulator GdBaCo2O5.5. Doping dependences of resistivity, Hall response, and thermoelectric power reveal that the doped holes greatly improve the conductivity, while the electron-doped samples always remain poorly conducting. This doping asymmetry provides strong evidence for a spin blockade of the electron transport in RBaCo2O5+x.
Create a lesson
Related papers
A hierarchy of exact lower bounds on the Laughlin spectral gap
Michael G. Scheer, Eslam Khalaf
Superexchange coupling between a dilute Gd3+ probe and orphan spins in a valence-bond glass
Patrick Colgan, Artur Solodovnyk, Jeremy P. Carlo et al.
Altermagnetic Ground States on the Ammann--Beenker Tiling
SeungBeom Hong, YunHo Kim, Moon Jip Park et al.
Unexpected stabilization of a single-q charge density wave in pristine 1T-TiSe2
Kimoon Higashihira Han, Dongju Hwang, Dongsin Kim et al.
Non-Hermitian Statistical Geometry
Xi Hu, Yan-Qiong Ma, Su-Peng Kou
Direct view of exciton and carrier dynamics in twisted bilayer graphene
Gianmarco Gatti, Anders S. Mortensen, Zhihao Jiang et al.