scholarly journals Density of states modulations from oxygen phonons ind-wave superconductors: Reconciling angle-resolved photoemission spectroscopy and scanning tunneling microscopy

2010 ◽  
Vol 81 (21) ◽  
Author(s):  
S. Johnston ◽  
T. P. Devereaux
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Density Of States ◽  
Photoemission Spectroscopy ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Angle Resolved Photoemission Spectroscopy

The adsorption of chlorine on TiO2() studied with scanning tunneling microscopy and photoemission spectroscopy

2002 ◽  
Vol 505 ◽  
pp. 336-348 ◽  
Author(s):  
E.L.D. Hebenstreit ◽  
W. Hebenstreit ◽  
H. Geisler ◽  
C.A. Ventrice ◽  
D.A. Hite ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Photoemission Spectroscopy ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

scholarly journals Kekulene: On-Surface Synthesis, Orbital Structure, and Aromatic Stabilization

2020 ◽  
Author(s):  
Anja Haags ◽  
Alexander Reichmann ◽  
Qitang Fan ◽  
Larissa Egger ◽  
Hans Kirschner ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Density Functional ◽  
Photoemission Spectroscopy ◽  
Scanning Tunneling ◽  
Orbital Structure ◽  
Tunneling Microscopy ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Highest Occupied Molecular Orbital ◽  
Shed Light ◽  
Aromatic Stabilization

We revisit the question of kekulene’s aromaticity by focusing on the electronic structure of its frontier orbitals as determined by angle-resolved photoemission spectroscopy. To this end, we have developed a specially designed precursor, 1,4,7(2,7)-triphenanthrenacyclononaphane-2,5,8-triene, which allows us to prepare sufficient quantities of kekulene of high purity directly on a Cu(111) surface, as confirmed by scanning tunneling microscopy. Supported by density functional calculations, we determine the orbital structure of kekulene’s highest occupied molecular orbital by photoelectron tomography. In agreement with a recent aromaticity assessment of kekulene based solely on C–C bond lengths, we conclude that the π-conjugation of kekulene is better described by the Clar model rather than a superaromatic model. Thus, by exploiting the capabilities of photoemission tomography, we shed light on the question which consequences aromaticity holds for the frontier electronic structure of a π-conjugated molecule.<br>

Sign in / Sign up

Export Citation Format

Share Document