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Scientific Report 2007-2009<br />
Laboratories and Facilities of the Department of Physics<br />
L13. Inhomogenoeus and Correlated Functional Materials<br />
and Quantum Phenomena in Condensed Matter Lab<br />
The G4-Superstripes laboratory is engaged in the experimental research on the physics of complex materials with interplaying<br />
electronic degrees of freedom. The goal is to develop new materials by optimization of physical parameters through<br />
an experimental approach based on the control and manipulation of materials properties in the correlated and locally inhomogeneous<br />
systems. The group has provided a significant contribution in the field of mesoscopic phase separation in the<br />
complex matter with quantum phenomena as the superconductivity. Exploiting the high energy spectroscopy as a tool of<br />
fundamental electronic structure, combined with structural tools of mesoscopic structure, the group has been active in the<br />
frontier research with a direct implication of our understanding of complex condensed matter.<br />
The G4 laboratory is specialized equipped with<br />
various instruments for the The G4 laboratory is<br />
specialized in the experimental research on quantum<br />
phenomena in complex matter. The research<br />
is addressed to unveil the complexity in known systems<br />
and in the synthesis of novel systems. The<br />
G4 laboratory is equipped with various instruments<br />
for the materials preparation and characterization.<br />
For the bulk preparation, in addition to several<br />
muffle furnaces, a furnace for Czochralski growth<br />
is available. Complex conductivity is frequently<br />
measured down to very low temperature using the<br />
Heliox3 cryostat. In addition, the group has a dedicated<br />
ultra high vacuum (UHV) facility equipped<br />
with a preparation chamber for layer by layer epitaxial<br />
growth of materials and the analysis chamber<br />
for spectroscopic analysis (Fig. 1). The preparation<br />
chamber has three e-beam evaporators, in<br />
Figure 1: Schematic representation of UHV system equipped with the<br />
facility of sample preparation and electron spectroscopy.<br />
addition to the RHEED facility. On the other<br />
hand, the analysis chamber is equipped with a dual anode X-ray source and an ultra violet radiation source, in addition<br />
to the high resolution multi channel Omicron EA 125 electron analyzer, permitting to perform XPS, AES and UPS<br />
measurements on complex materials. Surface structure and morphology can be studied using the LEED/Auger system<br />
mounted in the analysis chamber. All these measurements are possible down to about 20 K using liquid He cooled sample<br />
holder attached to the Omniax manipulator.<br />
The research in biological systems goes from<br />
metallo-proteins to metal nanoclusters and cellular<br />
organization. The G4 laboratory is equipped<br />
with an XE-120 atomic force microscope with combined<br />
capability of STM-AFM and is coupled with<br />
an optical microscope. The XE-120 permits Non-<br />
Contact mode imaging for both air and liquid imaging.<br />
The XE-120 is meant for studies of biological<br />
systems and for in-situ studies. The G4 laboratory<br />
is equipped with system for optical spectroscopy to<br />
study biological systems.<br />
Figure 2: Atomic Force Microscope XE-120 coupled with an optical<br />
microscope.<br />
http://www.superstripes.com/<br />
Related research activities: C4, C29.<br />
<strong>Sapienza</strong> Università di Roma 186 Dipartimento di Fisica