کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5789044 | 1414289 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study](/preview/png/5789044.png)
چکیده انگلیسی
We perform an in-plane optical spectroscopy measurement on high quality FeSe single crystals grown by a vapor transport technique. Below the structural transition at Ts â½90Â K, the reflectivity spectrum clearly shows a gradual suppression around 400Â cmâ1 and the conductivity spectrum shows a peak at higher frequency. The energy scale of this gap-like feature is comparable to the width of the band splitting observed by ARPES. The low-frequency conductivity consists of two Drude components and the overall plasma frequency is smaller than that of the FeAs based compounds, suggesting a lower carrier density or stronger correlation effect. The plasma frequency becomes even smaller below Ts which agrees with the very small Fermi energy estimated by other experiments. Similar to iron pnictides, a clear temperature-induced spectral weight transfer is observed for FeSe, being indicative of strong correlation effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science Bulletin - Volume 61, Issue 14, July 2016, Pages 1126-1131
Journal: Science Bulletin - Volume 61, Issue 14, July 2016, Pages 1126-1131
نویسندگان
Haipeng Wang, Zirong Ye, Yan Zhang, Nanlin Wang,