Infrared spectroscopy of pseudogaps in electron-doped superconductors

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

Research output: Contribution to journalArticle

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.

Original languageEnglish
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec 1

Fingerprint

Superconducting materials
Infrared spectroscopy
infrared spectroscopy
Pressure effects
Electrons
pressure effects
Rare earth elements
cuprates
Fourier transform infrared spectroscopy
electrons
rare earth elements
Single crystals
Infrared radiation
reflectance
Temperature
temperature
single crystals

All Science Journal Classification (ASJC) codes

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

Cite this

Choi, Kyujin ; Hong, T. Y. ; Park, S. R. ; Song, D. J. ; Kim, C. ; Eisaki, H. ; Kim, Jae Hoon. / Infrared spectroscopy of pseudogaps in electron-doped superconductors. In: Physica C: Superconductivity and its applications. 2010 ; Vol. 470, No. SUPPL.1.
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Infrared spectroscopy of pseudogaps in electron-doped superconductors. / Choi, Kyujin; Hong, T. Y.; Park, S. R.; Song, D. J.; Kim, C.; Eisaki, H.; Kim, Jae Hoon.

In: Physica C: Superconductivity and its applications, Vol. 470, No. SUPPL.1, 01.12.2010.

Research output: Contribution to journalArticle

TY - JOUR

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 Hoon

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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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