Stability of charged density waves in InAs nanowires in an external magnetic field.

We report on magnetotransport measurements at T = 4.2 K in a high-quality InAs nanowire (R-wire similar to 20 k Omega) in the presence of the charged tip of an atomic force microscope serving as a mobile gate. We demonstrate the crucial role of the external magnetic field on the amplitude of the charge density waves with a wavelength of 0.8 mu m. The observed suppression rate of their amplitude is similar or slightly higher than the one for weak localization correction in our investigated InAs nanowire.