کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1819893 | 1525771 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Single-particle excitation gap in La2âxSrxCuO4 studied by high-resolution angle-resolved photoemission
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Single-particle excitation gap in La2âxSrxCuO4 studied by high-resolution angle-resolved photoemission Single-particle excitation gap in La2âxSrxCuO4 studied by high-resolution angle-resolved photoemission](/preview/png/1819893.png)
چکیده انگلیسی
We report angle-resolved photoemission spectroscopy on optimally doped high-Tc superconductor La1.85Sr0.15CuO4 (Tc = 37 K) to elucidate the character of low-energy excitations in the superconducting state. We find a clear evidence for the emergence of a sharp superconducting quasiparticle peak below Tc together with opening of a superconducting gap at off-nodal region, while no signature of a quasiparticle peak is observed at (Ï, 0). From the comparison of spectral lineshape and energy dispersion between the nodal and the off-nodal region, we conclude that there are two characteristic energy scales (70 and 20 meV) in the superconducting state of optimally doped La1.85Sr0.15CuO4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volumes 463â465, 1 October 2007, Pages 44-47
Journal: Physica C: Superconductivity and its Applications - Volumes 463â465, 1 October 2007, Pages 44-47
نویسندگان
Y.X. Xiao, T. Sato, K. Terashima, H. Matsui, T. Takahashi, M. Kofu, K. Hirota,