Temperature-dependent scanning tunneling spectroscopy of Cr(001): Orbital Kondo resonance versus surface state

2005 ◽  
Vol 72 (8) ◽  
Author(s):  
T. Hänke ◽  
M. Bode ◽  
S. Krause ◽  
L. Berbil-Bautista ◽  
R. Wiesendanger
Keyword(s):  
Surface State ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Temperature Dependent ◽  
Kondo Resonance

Scanning tunneling spectroscopy of a magnetic adatom on graphene

2014 ◽  
Vol 28 (31) ◽  
pp. 1450225 ◽  
Author(s):  
Yang Gao ◽  
Kai-He Ding
Keyword(s):  
Gate Voltage ◽  
Local Density ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Differential Conductance ◽  
Scanning Tunneling ◽  
Density Of State ◽  
Tunneling Microscopy ◽  
Substitutional Site ◽  
Kondo Resonance

We present a theoretic study on scanning tunneling spectroscopy (STS) of a magnetic adatom on graphene. Three typical configurations of adatoms on graphene are considered explicitly: the adatom is on the top of a carbon atom (TC), in a substitutional site (SC), or above the center of the honeycomb hexagon (HC). Based on the nonequilibrium Green's function method, we derive the local density of state (LDOS) for the adatom and the differential conductance through the scanning tunneling microscopy (STM) device. Our results show that in comparison with the cases of the TC and SC, there exists an anomalous broadening of the local adatom energy level in the HC, which pushes the adatom energy to first cross the Fermi level, leading to the appearance of an antiresonance in the LDOS due to the interference between the Kondo resonance and the broadened adatom level. Correspondingly, the bias dependence of the differential conductance in the HC exhibits a more asymmetric sharp Kondo peak pinned to the gate voltage, and its height still remains significantly large compared to that for the other two cases. Additionally, with decreasing the gate voltage, the Kondo peak in the differential conductance gradually decays, and eventually vanishes in the absence of the gate voltage.

scholarly journals Unoccupied surface state on Pt(111) revealed by scanning tunneling spectroscopy

2005 ◽  
Vol 72 (19) ◽  
Author(s):  
J. Wiebe ◽  
F. Meier ◽  
K. Hashimoto ◽  
G. Bihlmayer ◽  
S. Blügel ◽  
...  
Keyword(s):  
Surface State ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling

scholarly journals Stark Effect and Scanning Tunneling Spectroscopy of the Ag(111) Surface State

2003 ◽  
Vol 104 (3-4) ◽  
pp. 185-191
Author(s):  
L. Limot ◽  
T. Maroutian ◽  
P. Johansson ◽  
R. Berndt
Keyword(s):  
Surface State ◽  
Stark Effect ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Tunneling
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