FIG. 3: T versus r$_{+}$ for b = 0 . 2, l = 0 . 5 and α = 0 . 1 , n = 4 (solid line), n = 5 (bold line), and n = 6 (dashed line). FIG. 4: T versus r$_{+}$ for b = 0 . 2, l = 0 . 5 and α = 2 , n = 4 (solid line), n = 5 (bold line), and n = 6 (dashed line). to the temperature of inner horizon. The radius of event horizon r$_{+}$ ≥ r$_{ext}$ for k = 0, and r$_{+}$ ≤ r$_{1ext}$ or r$_{+}$ ≥ r$_{2ext}$ for k = − 1. These facts can be seen in Figs. 3 - 6, which show the temperature versus r$_{+}$ in various dimensions. In order to be more clear, we discuss these figures for k = 0 and k = − 1, separately. k = 0: As one can see in Figs. 3 - 6, there exist extreme black brane with radius r$_{ext}$ provided α < α$_{ext}$ , where α 2 ext = n − 2 n ( n − 2 + 2( n − 1) [ ( 1 + r 2 ext b 2 ) 1 − n/ 2 − 1 ]) . (24) 9 k = –1 0 0.1 0.2 0.3 0.4 0.5 0.1 0.2 0.3 0.4 0.5 r+ k = 0 0 0.2 0.4 0.6 0.8 1 0.1 0.2 0.3 0.4 0.5 0.6 r+ k = –1 0 1 2 3 4 5 0.5 1 1.5 2 2.5 3 r+ k = 0 0 1 2 3 4 5 0.5 1 1.5 2 2.5 3 r+