Physics Graduate Brochure - Physics - North Carolina State University
Physics Graduate Brochure - Physics - North Carolina State University
Physics Graduate Brochure - Physics - North Carolina State University
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structure in films determines the energies of electronic<br />
transport states. In addition, the group has developed<br />
the capability to carry out spin polarized STM/STS for<br />
the purpose of understanding the interaction between<br />
magnetic surfaces and adsorbed molecules. These<br />
fundamental experiments provide the scientific<br />
foundation for optimizing applications of organic<br />
molecular materials in electronic and spintronic<br />
devices. (dan_dougherty@ncsu.edu)<br />
J. E. (Jack) Rowe<br />
Prof. Rowe’s group uses measurements that include<br />
scanning tunneling microscopy (STM), atomic force<br />
microscopy (AFM), low energy electron diffraction<br />
(LEED); soft X-ray photoemission spectroscopy<br />
(SXPS) including results with synchrotron radiation<br />
(SR-SXPS) and with spin detection. A major goal of<br />
this research program is to study the initial surface and<br />
buried-interface processes of electronic materials at<br />
the nanoscale. Photoemission-based methods can<br />
measure threshold energy barriers (sometimes these<br />
are spatially resolved). One example of these studies<br />
is the organic-molecule system of a nickel<br />
phthalocyanine (NiPc) film on a Au(001) surface.<br />
SR-SXPS results from these studies are shown in the<br />
figure below. The HOMO (2a 1u ) shifts between 1.4<br />
and 3 Å indicates that the barrier is not fully formed<br />
until ~3 Å. Future experiments will also measure XPS<br />
levels such as C-1s, Ni-2p, and Au-4f.<br />
(rowe@ncsu.edu)<br />
Constant current tunneling spectrum (tip displacement<br />
versus gap voltage) showing the π* derived resonance<br />
of a single Alq3 molecule on Cu(110). Inset is a quantum<br />
mechanical calculation of the π* orbital shape.<br />
Self assembled monolayer of benzoate on Cu(110)<br />
ARUPS valence orbitals of NiPc on a Au(001) surface at<br />
~300 K. Bottom vertical lines show gas-phase data IP’s.<br />
Further Information<br />
We encourage interested applicants to learn more by visiting the faculty web pages. Prospective students can contact<br />
any faculty member directly (see email addresses above) or the <strong>Graduate</strong> Program office at py-gradprogram@ncsu.edu.<br />
.NC STATE <strong>Physics</strong>.<br />
www.physics.ncsu.edu
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