Study on tunneling current through barrier height using scanning tunneling microscopy

2006 ◽  
Author(s):  
Nam-Suk Lee ◽  
Dong-Jin Qian ◽  
Hoon-Kyu Shin ◽  
Young-Soo Kwon
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Barrier Height ◽  
Tunneling Current ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

Scanning Tunneling Microscopy (STM)/Local Tunneling Barrier Height (LBH) Studies on Cs Adsorption on a Pt(111) Surface

2002 ◽  
Vol 41 (Part 1, No. 7B) ◽  
pp. 5003-5007 ◽  
Author(s):  
Yoichi Yamada ◽  
Asawin Sinsarp ◽  
Masahiro Sasaki ◽  
Shigehiko Yamamoto
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Barrier Height ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Tunneling Barrier

scholarly journals Towards Laterally Resolved Ferromagnetic Resonance with Spin-Polarized Scanning Tunneling Microscopy

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 827
Author(s):  
Marie Hervé ◽  
Moritz Peter ◽  
Timofey Balashov ◽  
Wulf Wulfhekel
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Ferromagnetic Resonance ◽  
Tunneling Current ◽  
Magnetic Vortex ◽  
Scanning Tunneling ◽  
Tunneling Junction ◽  
Resonance Signal ◽  
Tunneling Microscopy ◽  
Spin Polarized ◽  
Local Detection

We used a homodyne detection to investigate the gyration of magnetic vortex cores in Fe islands on W(110) with spin-polarized scanning tunneling microscopy at liquid helium temperatures. The technique aims at local detection of the spin precession as a function of frequency using a radio-frequency (rf) modulation of the tunneling bias voltage. The gyration was excited by the resulting spin-polarized rf current in the tunneling junction. A theoretical analysis of different contributions to the frequency-dependent signals expected in this technique is given. These include, besides the ferromagnetic resonance signal, also signals caused by the non-linearity of the I ( U ) characteristics. The vortex gyration was modeled with micromagnetic finite element methods using realistic parameters for the tunneling current, its spin polarization, and the island shape, and simulations were compared with the experimental results. The observed signals are presented and critically analyzed.

scholarly journals Apparent tunneling barrier height and local work function of atomic arrays

2018 ◽  
Vol 9 ◽  
pp. 3048-3052
Author(s):  
Neda Noei ◽  
Alexander Weismann ◽  
Richard Berndt
Keyword(s):  
Work Function ◽  
Barrier Height ◽  
Tunneling Current ◽  
Scanning Tunneling ◽  
Local Surface ◽  
Tunneling Microscopy ◽  
Tunneling Barrier ◽  
Spatially Resolved ◽  
Lateral Extent ◽  
Local Work

Spatially resolved measurements of the apparent tunneling barrier height Φapp in scanning tunneling microscopy have been used to estimate variations of the local work function Φ of surface structures. We experimentally show that Φapp can fail as a measure of Φ. The discrepancies are attributed to a kinetic-energy contribution to Φapp. This contribution depends on the lateral extent of the tunneling current filament and, consequently, on the local surface structure.

Scanning Tunneling Microscopy and Barrier-Height Study of K-Adsorbed Si(111) 7×7

2000 ◽  
Vol 39 (Part 1, No. 6B) ◽  
pp. 3736-3739 ◽  
Author(s):  
Shu Kurokawa ◽  
Jun Yoshikawa ◽  
Akira Sakai
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Barrier Height ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

scholarly journals Apparent Barrier Height in Scanning Tunneling Microscopy Revisited

1996 ◽  
Vol 76 (9) ◽  
pp. 1485-1488 ◽  
Author(s):  
L. Olesen ◽  
M. Brandbyge ◽  
M. R. Sørensen ◽  
K. W. Jacobsen ◽  
E. Lægsgaard ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Barrier Height ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

Transient tunneling current in laser-assisted scanning tunneling microscopy

1997 ◽  
Vol 82 (8) ◽  
pp. 4115-4117 ◽  
Author(s):  
I. Lyubinetsky ◽  
Z. Dohnálek ◽  
V. A. Ukraintsev ◽  
J. T. Yates
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Tunneling Current ◽  
Scanning Tunneling ◽  
Tunneling Microscopy
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