Tunneling spectroscopy of RTe2 (R=La, Ce) and possible coexistence between charge-density waves and magnetic order
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ID | 19315 |
本文ファイル | |
著者 |
Jung, Myoung Hwa
Kwon, Y. S.
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抄録(英) | Tunneling spectra are measured on the charge-density wave (CDW) compound LaTe2 and the isostructural antiferromagnet CeTe2 with TN = 4.3 K by a break-junction method. In contrast to the well-developed CDW gap 2δ = 0.9 eV wide for LaTe2, the spectrum of polycrystal CeTe2 is V shaped with 2δ = 1.2 eV. These gap structures agree with the optical-conductivity spectra for both compounds. The V-shaped spectrum for CeTe2 suggests that the CDW gap is modified by the presence of electronic states hybridized with the 4f electron states. A smaller gap 2δ* = 0.5 eV was observed for the bulk tunneling current in the c plane of single crystals of CeTe2. On cooling below TC = 6.1 K, where a short-range ferromagnetic order sets in, 2δ* exhibits a sharp minimum. Furthermore, subgap anomalies appear below TC and suddenly increase at TN. The normalized zero-bias conductance shows a minimum at TC and a sudden increase below TN. These facts suggest possible interplay of CDW's and magnetic order in CeTe2.
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掲載誌名 |
Physical Review B - Condensed Matter and Materials Physics
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巻 | 63巻
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号 | 3号
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開始ページ | 035101-1
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終了ページ | 035101-5
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出版年月日 | 2000-12-22
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出版者 | American Physical Society
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ISSN | 1098-0121
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NCID | |
出版者DOI | |
言語 |
英語
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NII資源タイプ |
学術雑誌論文
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広大資料タイプ |
学術雑誌論文
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DCMIタイプ | text
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フォーマット | application/pdf
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著者版フラグ | publisher
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権利情報 | Copyright (c) 2000 The American Physical Society.
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関連情報URL | |
部局名 |
総合科学研究科
先端物質科学研究科
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