Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

6-1-2016

Journal or Book Title

Physical Review B

Volume

93

Issue

22

First Page

224517

DOI

10.1103/PhysRevB.93.224517

Abstract

We present nuclear magnetic resonance evidence that very slow (≤1 MHz) spin fluctuations persist into the overdoped regime of Ba(Fe1−xRhx)2As2 superconductors. Measurements of the 75As spin echo decay rate, obtained both with Hahn Echo and Carr Purcell Meiboom Gill pulse sequences, show that the slowing down of spin fluctuations can be described by short-range diffusive dynamics, likely involving domain walls motions separating (π/a,0) from (0,π/a) correlated regions. This slowing down of the fluctuations is weakly sensitive to the external magnetic field and, although fading away with doping, it extends deeply into the overdoped regime.

Comments

This article is published as Bossoni, L., M. Moroni, Marc-Henri Julien, H. Mayaffre, P. C. Canfield, A. Reyes, William P. Halperin, and P. Carretta. "Persistence of slow fluctuations in the overdoped regime of Ba(Fe1−xRhx)2As2 superconductors." Physical Review B 93, no. 22 (2016): 224517. DOI: 10.1103/PhysRevB.93.224517. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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