Investigation of dimensionality in superconducting NbN thin film samples with different thicknesses and NbTiN meander nanowire samples by measuring the upper critical field

Nazir Mudassar^{1, 2}, Yang Xiaoyan³, Tian Huanfang¹, Song Pengtao^{1, 2}, Wang Zhan^{1, 2}, Xiang Zhongcheng¹, Guo Xueyi¹, Jin Yirong¹, You Lixing³, Zheng Dongning^{1, 2, 4, †}

The R–T curves measured in different applied magnetic fields 0, 0.05, 0.1, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9 (right to left, in units of T) for given specimens in both parallel and perpendicular orientations. By increasing the field, all curves move towards lower temperatures apparently and do not broaden.