Optical properties of the charge-density-wave compound CeTe2

K. E. Lee; C. I. Lee; H. J. Oh; M. A. Jung; B. H. Min; H. J. Im; T. Iizuka; Y. S. Lee; S. Kimura; Y. S. Kwon

doi:10.1103/PhysRevB.78.134408

Optical properties of the charge-density-wave compound CeTe₂

K. E. Lee, C. I. Lee, H. J. Oh, M. A. Jung, B. H. Min, H. J. Im, T. Iizuka, Y. S. Lee, S. Kimura, Y. S. Kwon

Department of Internal Medicine

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

5 Scopus citations

Abstract

The temperature dependence of the optical conductivity of CeTe2 was obtained for the E∥ab plane and E∥c axis at photon energies ranging from terahertz to visible light. Two gap states are found in the optical conductivity spectra. The magnitudes of the gaps are estimated to be 0.448 and 0.109 eV in the E∥ab plane. The former is due to perfect nesting, while the latter is due to imperfect nesting. The magnitude of the gap due to perfect nesting on the c axis is evaluated to be 0.854 eV. The Drude response caused by the ungapped Fermi surface is found only on the E∥ab plane since CeTe2 is a quasi-two-dimensional material. The portion of the ungapped Fermi surface across all Fermi surfaces is about 3%.

Original language	English
Article number	134408
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.78.134408
State	Published - 10 Oct 2008

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title = "Optical properties of the charge-density-wave compound CeTe2",

abstract = "The temperature dependence of the optical conductivity of CeTe2 was obtained for the E∥ab plane and E∥c axis at photon energies ranging from terahertz to visible light. Two gap states are found in the optical conductivity spectra. The magnitudes of the gaps are estimated to be 0.448 and 0.109 eV in the E∥ab plane. The former is due to perfect nesting, while the latter is due to imperfect nesting. The magnitude of the gap due to perfect nesting on the c axis is evaluated to be 0.854 eV. The Drude response caused by the ungapped Fermi surface is found only on the E∥ab plane since CeTe2 is a quasi-two-dimensional material. The portion of the ungapped Fermi surface across all Fermi surfaces is about 3\%.",

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doi = "10.1103/PhysRevB.78.134408",

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T1 - Optical properties of the charge-density-wave compound CeTe2

AU - Lee, K. E.

AU - Lee, C. I.

AU - Oh, H. J.

AU - Jung, M. A.

AU - Min, B. H.

AU - Im, H. J.

AU - Iizuka, T.

AU - Lee, Y. S.

AU - Kimura, S.

AU - Kwon, Y. S.

PY - 2008/10/10

Y1 - 2008/10/10

N2 - The temperature dependence of the optical conductivity of CeTe2 was obtained for the E∥ab plane and E∥c axis at photon energies ranging from terahertz to visible light. Two gap states are found in the optical conductivity spectra. The magnitudes of the gaps are estimated to be 0.448 and 0.109 eV in the E∥ab plane. The former is due to perfect nesting, while the latter is due to imperfect nesting. The magnitude of the gap due to perfect nesting on the c axis is evaluated to be 0.854 eV. The Drude response caused by the ungapped Fermi surface is found only on the E∥ab plane since CeTe2 is a quasi-two-dimensional material. The portion of the ungapped Fermi surface across all Fermi surfaces is about 3%.

AB - The temperature dependence of the optical conductivity of CeTe2 was obtained for the E∥ab plane and E∥c axis at photon energies ranging from terahertz to visible light. Two gap states are found in the optical conductivity spectra. The magnitudes of the gaps are estimated to be 0.448 and 0.109 eV in the E∥ab plane. The former is due to perfect nesting, while the latter is due to imperfect nesting. The magnitude of the gap due to perfect nesting on the c axis is evaluated to be 0.854 eV. The Drude response caused by the ungapped Fermi surface is found only on the E∥ab plane since CeTe2 is a quasi-two-dimensional material. The portion of the ungapped Fermi surface across all Fermi surfaces is about 3%.

UR - https://www.scopus.com/pages/publications/54449095630

U2 - 10.1103/PhysRevB.78.134408

DO - 10.1103/PhysRevB.78.134408

M3 - Article

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VL - 78

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 13

M1 - 134408

ER -

Optical properties of the charge-density-wave compound CeTe₂

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