Direct observation of standing electron waves in diffusively conducting InAs nanowire
A. A. Zhukov+, Ch. Volk*×, A. Winden*×, H. Hardtdegen*×, Th. Schäpers*×°
+Institute of Solid State Physics RAS, 142432 Chernogolovka, Russia
*Grünberg Institut (PGI-9), Forschungszentrum Jülich, 52425 Jülich, Germany
×JARA-Fundamentals of Future Information Technology,
Forschungszentrum Jülich, 52425 Jülich, Germany
°II. Physikalisches Institut, RWTH Aachen University, 52056 Aachen, Germany
Abstract
We investigate the disturbance of the InAs nanowire resistance by a
conductive tip of a scanning probe microscope at helium temperature as
a function of the tip position in close vicinity to the nanowire. At
the tip displacement along the wire the resistance
( kΩ, what is typical for diffusive regime) demonstrates
quasi-periodical oscillations with an amplitude about 3%. The period
of the oscillations depends on the number of electrons in the nanowire
and is consistent with expected for standing electron waves caused by
ballistic electrons in the top subband of the InAs nanowire.