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