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ID 19315
本文ファイル
著者
Jung, Myoung Hwa
Kwon, Y. S.
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.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
63巻
3号
開始ページ
035101-1
終了ページ
035101-5
出版年月日
2000-12-22
出版者
American Physical Society
ISSN
1098-0121
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2000 The American Physical Society.
関連情報URL
部局名
総合科学研究科
先端物質科学研究科