Spatially resolved gap closing in single Josephson junctions constructed on Bi<sub>2</sub>Te<sub>3</sub> surface

Spatially resolved gap closing in single Josephson junctions constructed on Bi₂Te₃ surface

Pang Yuan¹, Wang Junhua¹, Lyu Zhaozheng¹, Yang Guang¹, Fan Jie¹, Liu Guangtong¹, Ji Zhongqing¹, Jing Xiunian^{1, 2}, Yang Changli^{1, 2}, Lu Li^{1, 2, †,}

(a)–(d) 2D color plots of the contact resistance dV/dI_b of positions A, B, C, and D, respectively, as functions of magnetic field and bias current, when I_JJbias = 0 and T ≈ 10 mK. (e)–(h) The vertical line cuts in panels (a)–(d), respectively, at places marked by the arrows of the same color in corresponding color plots. The unit of the number in the legends is Gauss. (i)–(l) Horizontal line cuts in panels (a)–(d), respectively, at places marked by the arrows of the same color in corresponding color plots.