Dissemin is shutting down on January 1st, 2025

Published in

American Physical Society, Physical review B, 22(73)

DOI: 10.1103/physrevb.73.220407

Links

Tools

Export citation

Search in Google Scholar

Scaling of terahertz conductivity at the metal-insulator transition in doped manganites

Journal article published in 2006 by A. Pimenov, M. Biberacher, D. Ivannikov, A. Loidl ORCID, Mukhin Aa, A. A. Mukhin ORCID, Y.-U. G. Goncharov, A. M. Balbashov
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

Magnetic field and temperature dependence of the terahertz conductivity and permittivity of the colossal magnetoresistance manganite Pr0.65Ca0.28Sr0.07MnO3 (PCSMO) is investigated approaching the metal-to-insulator transition (MIT) from the insulating side. In the charge-ordered state of PCSMO both conductivity and dielectric permittivity increase as a function of magnetic field and temperature. Universal scaling relationships Δε∝Δσ are observed in a broad range of temperatures and magnetic fields. Similar scaling is also seen in La1−xSrxMnO3 for different doping levels. The observed proportionality points towards the importance of pure ac-conductivity and phononic energy scale at MIT in manganites.