Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
7-13-2012
Journal or Book Title
Physical Review Letters
Volume
109
Issue
2
First Page
027006
DOI
10.1103/PhysRevLett.109.027006
Abstract
We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe2As2 family. Our experiments have identified hallmarks of the pseudogap state in the BaFe2As2 system that mirror the spectroscopic manifestations of the pseudogap in the cuprates. The magnitude of the infrared pseudogap is in accord with that of the spin-density-wave gap of the parent compound. By monitoring the superconducting gap of both P- and Co-doped compounds, we find that the infrared pseudogap is unrelated to superconductivity. The appearance of the pseudogap is found to correlate with the evolution of the antiferromagnetic fluctuations associated with the spin-density-wave instability. The strong-coupling analysis of infrared data further reveals the interdependence between the magnetism and the pseudogap in the iron pnictides.
Copyright Owner
American Physical Society
Copyright Date
2012
Language
en
File Format
application/pdf
Recommended Citation
Moon, S. J.; Schafgans, A. A.; Kasahara, S.; Shibauchi, T.; Terashima, T.; Matsuda, Y.; Tanatar, Makariy A.; Prozorov, Tanya; Thaler, A.; Canfield, Paul C.; Sefat, A. S.; Mandrus, D.; and Basov, D. N., "Infrared Measurement of the Pseudogap of P-Doped and Co-Doped High-Temperature BaFe2As2 Superconductors" (2012). Physics and Astronomy Publications. 653.
https://lib.dr.iastate.edu/physastro_pubs/653
Comments
This article is published as Moon, S. J., A. A. Schafgans, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, Makariy A. Tanatar et al. "Infrared Measurement of the Pseudogap of P-Doped and Co-Doped High-Temperature BaFe 2 As 2 Superconductors." Physical Review Letters 109, no. 2 (2012): 027006. DOI: 10.1103/PhysRevLett.109.027006. Posted with permission.