Publication Date:
2015-10-17
Description:
Author(s): A. P. Dioguardi, M. M. Lawson, B. T. Bush, J. Crocker, K. R. Shirer, D. M. Nisson, T. Kissikov, S. Ran, S. L. Bud'ko, P. C. Canfield, S. Yuan, P. L. Kuhns, A. P. Reyes, H.-J. Grafe, and N. J. Curro This paper reports NMR spin-lattice and spin-spin relaxation rate data for iron arsenide superconductors involving multiple crystals with different dopants, doping levels, and magnetic fields. The results present evidence for glassy nematic fluctuations throughout an extensive region of phase space in these materials. The authors propose that the inhomogeneous relaxation dynamics that dominates the NMR response arises because the dopants introduce quenched random fields which couple to the nematic order. This disorder-induced frustration plays a significant role in suppressing antiferromagnetism and in the emergence of superconductivity. [Phys. Rev. B 92, 165116] Published Fri Oct 16, 2015
Keywords:
Electronic structure and strongly correlated systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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