Infrared spectroscopy of pseudogaps in electron-doped superconductors

Kyujin Choi; T. Y. Hong; S. R. Park; D. J. Song; C. Kim; H. Eisaki; Jae H. Kim

doi:10.1016/j.physc.2009.10.078

Infrared spectroscopy of pseudogaps in electron-doped superconductors

Kyujin Choi, T. Y. Hong, S. R. Park, D. J. Song, C. Kim, H. Eisaki, Jae H. Kim

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We have measured the ab-plane reflectivity spectra of n-type single-crystal cuprates R_1.85Ce_0.15CuO_4-δ (R = Nd, Eu, Gd) at temperatures from 10 to 280 K using Fourier-transform infrared (FTIR) spectroscopy. In the mid-infrared (MIR) region, Nd_1.85Ce _0.15CuO_4-δ (NCCO) does not exhibit pseudogap-like behavior, but Eu_1.85Ce_0.15CuO_4-δ (ECCO) and Gd_1.85Ce_0.15CuO_4-δ (GCCO) clearly exhibit strong pseudogap absorption between 0.15 eV and 0.4 eV. The relevant temperature range varies with the rare-earth element R via a pressure effect. The observed pseudogap evolution is well explained in terms of the antiferromagnetic phase fluctuation.

Original language	English
Pages (from-to)	S90-S91
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.078
Publication status	Published - 2010 Dec

Bibliographical note

Funding Information:
This work was supported by KICOS (Contract No. 2008-8-1673 ) and by NRF (Contract No. C00511 ).

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2009.10.078

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title = "Infrared spectroscopy of pseudogaps in electron-doped superconductors",

abstract = "We have measured the ab-plane reflectivity spectra of n-type single-crystal cuprates R1.85Ce0.15CuO4-δ (R = Nd, Eu, Gd) at temperatures from 10 to 280 K using Fourier-transform infrared (FTIR) spectroscopy. In the mid-infrared (MIR) region, Nd1.85Ce 0.15CuO4-δ (NCCO) does not exhibit pseudogap-like behavior, but Eu1.85Ce0.15CuO4-δ (ECCO) and Gd1.85Ce0.15CuO4-δ (GCCO) clearly exhibit strong pseudogap absorption between 0.15 eV and 0.4 eV. The relevant temperature range varies with the rare-earth element R via a pressure effect. The observed pseudogap evolution is well explained in terms of the antiferromagnetic phase fluctuation.",

author = "Kyujin Choi and Hong, {T. Y.} and Park, {S. R.} and Song, {D. J.} and C. Kim and H. Eisaki and Kim, {Jae H.}",

note = "Funding Information: This work was supported by KICOS (Contract No. 2008-8-1673 ) and by NRF (Contract No. C00511 ).",

year = "2010",

month = dec,

doi = "10.1016/j.physc.2009.10.078",

language = "English",

volume = "470",

pages = "S90--S91",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

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T1 - Infrared spectroscopy of pseudogaps in electron-doped superconductors

AU - Choi, Kyujin

AU - Hong, T. Y.

AU - Park, S. R.

AU - Song, D. J.

AU - Kim, C.

AU - Eisaki, H.

AU - Kim, Jae H.

N1 - Funding Information: This work was supported by KICOS (Contract No. 2008-8-1673 ) and by NRF (Contract No. C00511 ).

PY - 2010/12

Y1 - 2010/12

N2 - We have measured the ab-plane reflectivity spectra of n-type single-crystal cuprates R1.85Ce0.15CuO4-δ (R = Nd, Eu, Gd) at temperatures from 10 to 280 K using Fourier-transform infrared (FTIR) spectroscopy. In the mid-infrared (MIR) region, Nd1.85Ce 0.15CuO4-δ (NCCO) does not exhibit pseudogap-like behavior, but Eu1.85Ce0.15CuO4-δ (ECCO) and Gd1.85Ce0.15CuO4-δ (GCCO) clearly exhibit strong pseudogap absorption between 0.15 eV and 0.4 eV. The relevant temperature range varies with the rare-earth element R via a pressure effect. The observed pseudogap evolution is well explained in terms of the antiferromagnetic phase fluctuation.

AB - We have measured the ab-plane reflectivity spectra of n-type single-crystal cuprates R1.85Ce0.15CuO4-δ (R = Nd, Eu, Gd) at temperatures from 10 to 280 K using Fourier-transform infrared (FTIR) spectroscopy. In the mid-infrared (MIR) region, Nd1.85Ce 0.15CuO4-δ (NCCO) does not exhibit pseudogap-like behavior, but Eu1.85Ce0.15CuO4-δ (ECCO) and Gd1.85Ce0.15CuO4-δ (GCCO) clearly exhibit strong pseudogap absorption between 0.15 eV and 0.4 eV. The relevant temperature range varies with the rare-earth element R via a pressure effect. The observed pseudogap evolution is well explained in terms of the antiferromagnetic phase fluctuation.

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DO - 10.1016/j.physc.2009.10.078

M3 - Article

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SN - 0921-4534

VL - 470

SP - S90-S91

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.1

ER -

Infrared spectroscopy of pseudogaps in electron-doped superconductors

Abstract

Bibliographical note

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