Scanning tunneling microscope measures the spin-excitation spectrum of atomic-scale magnets

Physics Today ◽  
2006 ◽  
Vol 59 (7) ◽  
pp. 13-14 ◽  
Author(s):  
Mark Wilson
Keyword(s):  
Excitation Spectrum ◽  
Scanning Tunneling Microscope ◽  
Atomic Scale ◽  
Spin Excitation ◽  
Scanning Tunneling ◽  
Tunneling Microscope

scholarly journals Atomic-scale spin sensing with a single molecule at the apex of a scanning tunneling microscope

Science ◽  
2019 ◽  
Vol 366 (6465) ◽  
pp. 623-627 ◽  
Author(s):  
B. Verlhac ◽  
N. Bachellier ◽  
L. Garnier ◽  
M. Ormaza ◽  
P. Abufager ◽  
...  
Keyword(s):  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
Point Contact ◽  
Copper Surface ◽  
Atomic Scale ◽  
Spin Excitation ◽  
Scanning Tunneling ◽  
Detection Scheme ◽  
Tunneling Microscope ◽  
Spin Excitations

Recent advances in scanning probe techniques rely on the chemical functionalization of the probe-tip termination by a single molecule. The success of this approach opens the prospect of introducing spin sensitivity through functionalization by a magnetic molecule. We used a nickelocene-terminated tip (Nc-tip), which offered the possibility of producing spin excitations on the tip apex of a scanning tunneling microscope (STM). When the Nc-tip was 100 picometers away from point contact with a surface-supported object, magnetic effects could be probed through changes in the spin excitation spectrum of nickelocene. We used this detection scheme to simultaneously determine the exchange field and the spin polarization of iron atoms and cobalt films on a copper surface with atomic-scale resolution.

MANIPULATION OF ATOMS AND MOLECULES FOR CONSTRUCTION OF NANOSYSTEMS: THE SCANNING TUNNELING MICROSCOPE AS AN OPERATIVE TOOL

2003 ◽  
Vol 02 (04n05) ◽  
pp. 197-218
Author(s):  
K.-F. BRAUN ◽  
F. MORESCO ◽  
K. MORGENSTERN ◽  
S. FÖLSCH ◽  
J. REPP ◽  
...  
Keyword(s):  
Scanning Tunneling Microscope ◽  
Single Molecules ◽  
Short Review ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Nanoscale Structures ◽  
Constant Height ◽  
Functionalized Tips ◽  
Structure Research

Controlled manipulations with scanning tunneling microscope (STM) down to the scale of small molecules and single atoms allow to build molecular and atomic nanosystems, leading to the fascinating possibility of creating manmade structures on atomic scale. Here we present a short review on investigations based on atomic scale manipulation. Upon soft lateral manipulation of adsorbed species, in which only tip/particle forces are used, three different manipulation modes can be discerned: pushing, pulling and sliding. Even the manipulation of strongly bound native substrate atoms is possible. We demonstrate applications as local analytic and synthetic chemistry tools, with important consequences on surface structure research. Vertical manipulation of Xe and CO leads to improved imaging with functionalized tips. With CO deliberately transferred to the tip, we have also succeeded to perform vibrational spectroscopy on single molecules. Furthermore, we describe how we have reproduced a full chemical reaction with single molecules, whereby all basic steps, namely preparation of the reactants, diffusion and association, are induced with the STM tip. Here also field and electron current effects are employed. Finally, we have extended the manipulation techniques to large specially designed molecules by performing lateral manipulation in constant height and realizing the principle of a conformational molecular switch. Artificial nanoscale structures built in atom by atom fashion can serve as quantum laboratories for investigations of various physical properties.

Spin-Polarized Scanning Tunneling Microscopy (SPSTM)

1991 ◽  
Vol 231 ◽  
Author(s):  
R. Wiesendanger ◽  
D. Buergler ◽  
G. Tarrach ◽  
I.V. Shvets ◽  
H.-J. Guentherodt
Keyword(s):  
Scanning Tunneling Microscope ◽  
High Spatial Resolution ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Promising Technique ◽  
Polarized Electrons ◽  
Tunneling Microscope ◽  
Magnetic Structures ◽  
Spin Polarized

AbstractWe report on a novel promising technique for the investigation of magnetic structures at surfaces at high spatial resolution, ultimately down to the atomic scale. This technique is based on the observation of vacuum tunneling of spin-polarized electrons by means of a scanning tunneling microscope (STM). We discuss appropriate probe tips for the spin-polarized STM (SPSTM) and describe initial experimental results. We further focus on the information obtained by SPSTM. Finally, the perspectives of SPSTM will be discussed.

A Scanning Tunneling Microscope as a Tunable Nanoantenna for Atomic Scale Control of Optical-Field Enhancement

Nano Letters ◽  
2010 ◽  
Vol 10 (10) ◽  
pp. 3857-3862 ◽  
Author(s):  
Damien Riedel ◽  
Roger Delattre ◽  
Andrey G. Borisov ◽  
Tatiana V. Teperik
Keyword(s):  
Scanning Tunneling Microscope ◽  
Field Enhancement ◽  
Optical Field ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Scale Control

scholarly journals Robust procedure for creating and characterizing the atomic structure of scanning tunneling microscope tips

2017 ◽  
Vol 8 ◽  
pp. 2389-2395 ◽  
Author(s):  
Sumit Tewari ◽  
Koen M Bastiaans ◽  
Milan P Allan ◽  
Jan M van Ruitenbeek
Keyword(s):  
Atomic Structure ◽  
Scanning Tunneling Microscope ◽  
Critical Role ◽  
Atomic Layer ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Stm Tips

Scanning tunneling microscopes (STM) are used extensively for studying and manipulating matter at the atomic scale. In spite of the critical role of the STM tip, procedures for controlling the atomic-scale shape of STM tips have not been rigorously justified. Here, we present a method for preparing tips in situ while ensuring the crystalline structure and a reproducibly prepared tip structure up to the second atomic layer. We demonstrate a controlled evolution of such tips starting from undefined tip shapes.

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