Tip-induced band bending by scanning tunneling spectroscopy of the states of the tip-induced quantum dot on InAs(110)

1999 ◽  
Vol 59 (12) ◽  
pp. 8043-8048 ◽  
Author(s):  
R. Dombrowski ◽  
Chr. Steinebach ◽  
Chr. Wittneven ◽  
M. Morgenstern ◽  
R. Wiesendanger
Keyword(s):  
Quantum Dot ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Band Bending

Scanning Tunneling Spectroscopy of Photoexcitations on a Nanosecond Time-Scale

1995 ◽  
Vol 380 ◽  
Author(s):  
Todd G. Ruskell ◽  
Dong Chen ◽  
Dror Sarid
Keyword(s):  
High Frequency ◽  
Beat Frequency ◽  
Surface States ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Tunneling Junction ◽  
Band Bending ◽  
High Frequency Response ◽  
Longitudinal Modes

ABSTRACTScanning tunneling spectroscopy of the high frequency response of photoexcited carriers in the layered structure semiconductors n–type MoS2 and p–type Wse2 is demonstrated using the beat frequency of the longitudinal modes of a HeNe laser at the tunneling junction. We analyze the optical response taking into account the effects of tip-induced band bending and surface states.

Scanning-tunneling spectroscopy on conjugated polymer films

2003 ◽  
Vol 771 ◽  
Author(s):  
M. Kemerink ◽  
S.F. Alvarado ◽  
P.M. Koenraad ◽  
R.A.J. Janssen ◽  
H.W.M. Salemink ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Three Dimensional ◽  
Field Enhancement ◽  
Direct Consequence ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Band Alignment ◽  
Scanning Tunneling ◽  
Order Of Magnitude

AbstractScanning-tunneling spectroscopy experiments have been performed on conjugated polymer films and have been compared to a three-dimensional numerical model for charge injection and transport. It is found that field enhancement near the tip apex leads to significant changes in the injected current, which can amount to more than an order of magnitude, and can even change the polarity of the dominant charge carrier. As a direct consequence, the single-particle band gap and band alignment of the organic material can be directly obtained from tip height-voltage (z-V) curves, provided that the tip has a sufficiently sharp apex.

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