Far-infrared measurement of the gap of the high-Tc superconductor La1.85Sr0.15CuO4-x

D. A. Bonn; J. E. Greedan; C. V. Stager; T. Timusk; M. G. Doss; S. Herr; K. Kamars; C. D. Porter; D. B. Tanner; J. M. Tarascon; W. R. McKinnon; L. H. Greene

doi:10.1103/PhysRevB.35.8843

Far-infrared measurement of the gap of the high-Tc superconductor La1.85Sr0.15CuO4-x

D. A. Bonn, J. E. Greedan, C. V. Stager, T. Timusk, M. G. Doss, S. Herr, K. Kamars, C. D. Porter, D. B. Tanner, J. M. Tarascon, W. R. McKinnon, L. H. Greene

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Abstract

We report on far infrared measurements of the energy gap of the high-temperature superconductor La1.85Sr0.15CuO4-x. From the reflectance, measured over a wide range of frequencies, we calculate the optical conductivity. It shows phononlike lines at 239, 355, and 494 cm-1 and a gaplike depression below 140 cm-1. The strong edge seen in reflectance at 50 cm-1, and misidentified by a number of investigators as the energy gap, does not appear in the conductivity. It is due to a zero crossing of 1() caused by the strong phonons.

Original language	English (US)
Pages (from-to)	8843-8845
Number of pages	3
Journal	Physical Review B
Volume	35
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.35.8843
State	Published - 1987
Externally published	Yes

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Condensed Matter Physics

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10.1103/PhysRevB.35.8843

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title = "Far-infrared measurement of the gap of the high-Tc superconductor La1.85Sr0.15CuO4-x",

abstract = "We report on far infrared measurements of the energy gap of the high-temperature superconductor La1.85Sr0.15CuO4-x. From the reflectance, measured over a wide range of frequencies, we calculate the optical conductivity. It shows phononlike lines at 239, 355, and 494 cm-1 and a gaplike depression below 140 cm-1. The strong edge seen in reflectance at 50 cm-1, and misidentified by a number of investigators as the energy gap, does not appear in the conductivity. It is due to a zero crossing of 1() caused by the strong phonons.",

author = "Bonn, {D. A.} and Greedan, {J. E.} and Stager, {C. V.} and T. Timusk and Doss, {M. G.} and S. Herr and K. Kamars and Porter, {C. D.} and Tanner, {D. B.} and Tarascon, {J. M.} and McKinnon, {W. R.} and Greene, {L. H.}",

year = "1987",

doi = "10.1103/PhysRevB.35.8843",

language = "English (US)",

volume = "35",

pages = "8843--8845",

journal = "Physical Review B",

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T1 - Far-infrared measurement of the gap of the high-Tc superconductor La1.85Sr0.15CuO4-x

AU - Bonn, D. A.

AU - Greedan, J. E.

AU - Stager, C. V.

AU - Timusk, T.

AU - Doss, M. G.

AU - Herr, S.

AU - Kamars, K.

AU - Porter, C. D.

AU - Tanner, D. B.

AU - Tarascon, J. M.

AU - McKinnon, W. R.

AU - Greene, L. H.

PY - 1987

Y1 - 1987

N2 - We report on far infrared measurements of the energy gap of the high-temperature superconductor La1.85Sr0.15CuO4-x. From the reflectance, measured over a wide range of frequencies, we calculate the optical conductivity. It shows phononlike lines at 239, 355, and 494 cm-1 and a gaplike depression below 140 cm-1. The strong edge seen in reflectance at 50 cm-1, and misidentified by a number of investigators as the energy gap, does not appear in the conductivity. It is due to a zero crossing of 1() caused by the strong phonons.

AB - We report on far infrared measurements of the energy gap of the high-temperature superconductor La1.85Sr0.15CuO4-x. From the reflectance, measured over a wide range of frequencies, we calculate the optical conductivity. It shows phononlike lines at 239, 355, and 494 cm-1 and a gaplike depression below 140 cm-1. The strong edge seen in reflectance at 50 cm-1, and misidentified by a number of investigators as the energy gap, does not appear in the conductivity. It is due to a zero crossing of 1() caused by the strong phonons.

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DO - 10.1103/PhysRevB.35.8843

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IS - 16

ER -

Far-infrared measurement of the gap of the high-Tc superconductor La1.85Sr0.15CuO4-x

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