Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

10-15-2015

Journal or Book Title

Physical Review B

Volume

92

Issue

16

First Page

165116

DOI

10.1103/PhysRevB.92.165116

Abstract

We present 75As nuclear magnetic resonance spin-lattice and spin-spin relaxation rate data in Ba(Fe1−xCox)2As2 and Ba(Fe1−xCux)2As2 as a function of temperature, doping, and magnetic field. The relaxation curves exhibit a broad distribution of relaxation rates, consistent with inhomogeneous glassy behavior up to 100 K. The doping and temperature response of the width of the dynamical heterogeneity is similar to that of the nematic susceptibility measured by elastoresistance measurements. We argue that quenched random fields which couple to the nematic order give rise to a nematic glass that is reflected in the spin dynamics.

Comments

This article is published as Dioguardi, A. P., M. M. Lawson, B. T. Bush, J. Crocker, K. R. Shirer, D. M. Nisson, T. Kissikov et al. "NMR evidence for inhomogeneous glassy behavior driven by nematic fluctuations in iron arsenide superconductors." Physical Review B 92, no. 16 (2015): 165116. DOI: 10.1103/PhysRevB.92.165116. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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