Page 390 - Fiber Fracture

372 J. Bemholc et al.

20
18
16

4
2
0
-3.0 -2.0 -1.0 0.0 1.0 2.0
E (ev)

Fig. 12. Conductance of a symmetrically bent (53) armchair nanotube. Different curves correspond to
different bending angles: 6", 18", 24" and 36", as shown in the legend. Inset: conductance of a (53 tube
with an asymmetric bend of 24". A pseudo-gap at the Fermi energy (always taken as reference) is clearly
present, see text.

20
ia
16

4
2
0
-3.0 -2.0 -1.0 0.0 1.0 2.0
E (W
Fig. 13. Conductance of a bent (6,3) chiral nanotube. Different curves correspond to different bending
angles: 6", 24", and 42", as shown in the legend. Inset: conductance of a bent (12,6) chiral nanotube for 0 =
0", 12". The Fermi energy is taken as reference.

tubes essentially retain their metallic character even after large-angle bending and can
therefore be assigned to the (2) class of behavior in Bezryadin et al. (1998).
In Fig. 13 we present the conductance of a bent (6,3) chiral nanotube, for 8 = 6", 18"
and 42". Because of the relatively small diameter (d = 0.6 nm), the curvature-induced