Infrared measurement of the pseudogap of P-doped and Co-doped high-temperature BaFe 2As 2 superconductors

S. J. Moon; A. A. Schafgans; S. Kasahara; T. Shibauchi; T. Terashima; Y. Matsuda; M. A. Tanatar; R. Prozorov; A. Thaler; P. C. Canfield; A. S. Sefat; D. Mandrus; D. N. Basov

doi:10.1103/PhysRevLett.109.027006

Infrared measurement of the pseudogap of P-doped and Co-doped high-temperature BaFe ₂As ₂ superconductors

S. J. Moon, A. A. Schafgans, S. Kasahara, T. Shibauchi, T. Terashima, Y. Matsuda, M. A. Tanatar, R. Prozorov, A. Thaler, P. C. Canfield, A. S. Sefat, D. Mandrus, D. N. Basov

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Abstract

We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe ₂As ₂ family. Our experiments have identified hallmarks of the pseudogap state in the BaFe ₂As ₂ 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.

Original language	English
Article number	027006
Journal	Physical Review Letters
Volume	109
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.109.027006
Publication status	Published - Jul 13 2012
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Moon, S. J., Schafgans, A. A., Kasahara, S., Shibauchi, T., Terashima, T., Matsuda, Y., Tanatar, M. A., Prozorov, R., Thaler, A., Canfield, P. C., Sefat, A. S., Mandrus, D., & Basov, D. N. (2012). Infrared measurement of the pseudogap of P-doped and Co-doped high-temperature BaFe ₂As ₂ superconductors. Physical Review Letters, 109(2), [027006]. https://doi.org/10.1103/PhysRevLett.109.027006

Moon, SJ, Schafgans, AA, Kasahara, S, Shibauchi, T, Terashima, T, Matsuda, Y, Tanatar, MA, Prozorov, R, Thaler, A, Canfield, PC, Sefat, AS, Mandrus, D & Basov, DN 2012, 'Infrared measurement of the pseudogap of P-doped and Co-doped high-temperature BaFe ₂As ₂ superconductors', Physical Review Letters, vol. 109, no. 2, 027006. https://doi.org/10.1103/PhysRevLett.109.027006

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title = "Infrared measurement of the pseudogap of P-doped and Co-doped high-temperature BaFe 2As 2 superconductors",

abstract = "We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe 2As 2 family. Our experiments have identified hallmarks of the pseudogap state in the BaFe 2As 2 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.",

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doi = "10.1103/PhysRevLett.109.027006",

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AU - Moon, S. J.

AU - Schafgans, A. A.

AU - Kasahara, S.

AU - Shibauchi, T.

AU - Terashima, T.

AU - Matsuda, Y.

AU - Tanatar, M. A.

AU - Prozorov, R.

AU - Thaler, A.

AU - Canfield, P. C.

AU - Sefat, A. S.

AU - Mandrus, D.

AU - Basov, D. N.

PY - 2012/7/13

Y1 - 2012/7/13

N2 - We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe 2As 2 family. Our experiments have identified hallmarks of the pseudogap state in the BaFe 2As 2 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.

AB - We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe 2As 2 family. Our experiments have identified hallmarks of the pseudogap state in the BaFe 2As 2 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.

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Infrared measurement of the pseudogap of P-doped and Co-doped high-temperature BaFe ₂As ₂ superconductors

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