کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9841569 | 1525793 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High field magnetoresistivity of epitaxial La2âxSrxCuO4 thin films
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A large positive magnetoresistivity (up to tens of percents) is observed in both underdoped and overdoped superconducting La2âxSrxCuO4 epitaxial thin films at temperatures far above the superconducting critical temperature Tc. For the underdoped samples, this magnetoresistance cannot be described by the Kohler rule and we believe it is to be attributed to the influence of superconducting fluctuations. In the underdoped samples (0.05 ⩽ x ⩽ 0.15), the large magnetoresistance is only present when at low temperatures superconductivity occurs. The strong magnetoresistivity, which persists even at temperatures substantially above Tc, can be related to the pairs forming eventually the superconducting state below Tc. Our observations support the idea of a close relation between the pseudogap and the superconducting gap and provide new indications for the presence of pairs above Tc.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 432, Issues 1â2, 1 November 2005, Pages 81-98
Journal: Physica C: Superconductivity and its Applications - Volume 432, Issues 1â2, 1 November 2005, Pages 81-98
نویسندگان
J. Vanacken, L. Weckhuysen, T. Wambecq, P. Wagner, V.V. Moshchalkov,