本論文將討論釤鈰銅氧化合物(Sm2-xCexCuO4＋d )系統之金屬絕緣體轉變與化合物中氧含量之間的關係及其超導相(Sm1.85Ce0.15CuO4＋d )的d波偶對稱超導性質。
常壓下相穩定的釤鈰銅氧化合物系統中，在空氣中燒結為金屬氧化物，此化合物低溫為反鐵磁序結構，在外加1 kG的磁場下，釤銅氧化合物(Sm2CuO4＋d )的反鐵磁序轉變溫度TN(Sm)為 6.0 K，而釤鈰銅氧化合物(Sm1.85Ce0.15CuO4+d)的反鐵磁序轉變溫度TN(Sm/Ce)為 4.6 K，對於摻雜7.5%鈰(Ce)的Sm1.85Ce0.15CuO4+d 樣本經退火處理後可得到超導轉變溫度Tc = 24 K的高溫電子氧化物超導體。在此一系統中，我們將研究其結構、磁性、比熱及電性等性質，並且觀察到超導絕緣體相轉變發生在氧含量d = 0.05附近。

為了確認高溫電子超導體的電子偶對稱性，我們選擇在磁場下排序過的24Ｋ超導的釤鈰銅氧化合物(Sm1.85Ce0.15CuO3.98) 粉末樣本做更進一步的測量。經由測量磁場垂直銅氧平面的磁化率對溫度的關係，我們可以理論計算出在銅氧平面上的磁場穿透深度lab與溫度的關係。測量結果發現，樣本中的銅氧平面穿透深度lab變化量與溫度平方項相關，這是晶體中的氧分佈不均勻所導致的。

Abstract
In this article, we studied on metal-insulator transition with oxygen content parameter d in the Sm2-xCexCuO4+d systems. We studied the d-wave pairing symmetry for the Sm2-xCexCuO4+d systems further.

In the Sm2-xCexCuO4+d systems, the antiferromagnetic order of Sm3+ is 6.0 K for x = 0, and 4.6 K for x=0.15 in 1 kG applied magnetic field. After oxygen-reduced the as-sintered Sm1.85Ce0.15CuO4+d sample change to superconductor with Tc = 24 K. The crystal structure, magnetism, specific heat, and electric property were discussed in this system. A superconductor-insulator transition around d = 0.05 was observed.

In order to confirm the pairing state of the high Tc electron doped superconductor Sm1.85Ce0.15CuO4+d was chosen for further study. We use a c-axis alignment power method and particle distribution to calculate the penetration depth function of temperature lab(T) for vertical CuO2 planes of applied field. The temperature dependence of penetration depth change shows a linear power law component. The linear term show that wave equation was d-wave symmetry, but our data with larger T2 term show the inhomogenous oxygen content, disorder-scatter dirty d-wave-like T2 law.

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