教師資料查詢 | 類別: 期刊論文 | 教師: 杜昭宏 Chao-hung Du (瀏覽個人網頁)

標題:Quasi-two-dimensional superconductivity in wurtzite-structured InN films
學年96
學期1
出版(發表)日期2007/12/01
作品名稱Quasi-two-dimensional superconductivity in wurtzite-structured InN films
作品名稱(其他語言)
著者Ling, D. C.; Cheng, J. H.;Lo, Y. Y. ; Du, C. H.; Chiu, A. P.; Chang, C. A.; Chang. P. H.
單位淡江大學物理學系
出版者Weinheim: Wiley - VCH Verlag GmbH & Co. KGaA
著錄名稱、卷期、頁數Physica Status Solidi. B: Basic Research 244(12), pp.4594-4597
摘要C-axis oriented InN films with wurtzite structure were grown on sapphire (0001) substrate by MOCVD method. Superconductivity with transition onset temperature Tc,onset around 3.5 K has been characterized by magnetotransport measurements in fields up to 9 Tesla for films with carrier concentration in the range of 1×1019 cm–3 to 7×1020 cm–3. Among them, the film with a nitridation buffer layer has the highest zero-resistance temperature Tc0 of 2 K. The normal-state magnetoresistance follows Kohler's rule ΔR /R ∝ (H /R)2, indicating that there is a single species of charge carrier with single scattering time at all points on the Fermi surface. The extrapolated value of zero-temperature upper critical field Hc 2ab (0) and Hc 2c (0) is estimated to be 5900 G and 2800 G, respectively, giving rise to the anisotropy parameter about 2.1. The angular dependence of the upper critical field is in good agreement with the behavior predicted by Lawrence-Doniach model in the two-dimensional (2D) limit strongly suggesting that the InN film is a quasi-2D superconductor. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
關鍵字
語言英文
ISSN0370-1972
期刊性質國外
收錄於SCI
產學合作
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國別德國
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