Tunneling spectroscopy of RTe2 (R=La, Ce) and possible coexistence between charge-density waves and magnetic order
Physical Review B - Condensed Matter and Materials Physics 63 巻 3 号
035101-1-035101-5 頁
2000-12-22 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Tunneling spectroscopy of RTe2 (R=La, Ce) and possible coexistence between charge-density waves and magnetic order
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| 作成者 |
Jung Myoung Hwa
Kwon Y. S.
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| 収録物名 |
Physical Review B - Condensed Matter and Materials Physics
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| 巻 | 63 |
| 号 | 3 |
| 開始ページ | 035101-1 |
| 終了ページ | 035101-5 |
| 抄録 |
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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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2000-12-22 |
| 権利情報 |
Copyright (c) 2000 The American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.63.035101
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.62.11609
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