Quasi-isotropic orbital magnetoresistance in lightly doped SrTiO3
COLLIGNON, Clément
Jeunes Équipes de l'Institut de Physique du Collège de France [JEIPCdF]
Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) [LPEM]
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Jeunes Équipes de l'Institut de Physique du Collège de France [JEIPCdF]
Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) [LPEM]
COLLIGNON, Clément
Jeunes Équipes de l'Institut de Physique du Collège de France [JEIPCdF]
Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) [LPEM]
Jeunes Équipes de l'Institut de Physique du Collège de France [JEIPCdF]
Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) [LPEM]
VIGNOLLE, Baptiste
Laboratoire national des champs magnétiques intenses - Toulouse [LNCMI-T]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Laboratoire national des champs magnétiques intenses - Toulouse [LNCMI-T]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Physical Review Materials. 2021-06, vol. 5, n° 6, p. 065002 (6 p.)
American Physical Society
English Abstract
A magnetic field parallel to an electrical current does not produce a Lorentz force on the charge carriers. Therefore, orbital longitudinal magnetoresistance is unexpected. Here we report on the observation of a large and ...Read more >
A magnetic field parallel to an electrical current does not produce a Lorentz force on the charge carriers. Therefore, orbital longitudinal magnetoresistance is unexpected. Here we report on the observation of a large and nonsaturating magnetoresistance in lightly doped SrTiO3−x independent of the relative orientation of current and magnetic field. We show that this quasi-isotropic magnetoresistance can be explained if the carrier mobility along all orientations smoothly decreases with magnetic field. This anomalous regime is restricted to low concentrations when the dipolar correlation length is shorter than the distance between carriers. We identify cyclotron motion of electrons in a potential landscape tailored by polar domains as the cradle of quasi-isotropic orbital magnetoresistance. The result emerges as a challenge to theory and may be a generic feature of lightly doped quantum paralectric materials.Read less <
ANR Project
Interaction entre ferroélctricité et la supraconductivité - ANR-18-CE92-0020
Origin
Hal imported