Laboratory of Physics and Chemistry of Surfaces and Interfaces

On January 6, 2014, the teams of the SPCSI (Division of Physics and Chemistry of Surfaces and Interfaces) have been officially associated to IRAMIS/NIMBE (chemists) and IRAMIS/SPEC (physicists).

Since july 2000 to the end of 2013, the SPCSI (Physics and Chemistry of Surfaces and Interfaces Laboratory) has been a research unit for the studies of basic properties of surfaces and interfaces and their potential applications. This Laboratory was part of to the Research Division on Atoms, Molecules and Condensed Matter (DRECAM) then IRAMIS (Saclay Institute of Matter and Radiation) within the Department of Matter Sciences (DSM) of the CEA (French Atomic Energy Commission).

Gathering chemists and physicists, the SPCSI was equipped with a powerful set of devices for characterization at the atomic scale of surfaces: an XPS Kratos and a platform of equipments (STM / AFM - LEEM / PEEM - XPD) to investigate surfaces under ultrahigh vacuum, that the NIMBE and SPEC teams continue today to use successfully.

#445 - Last update : 10/03 2022

More ...

$Groupe Photoemission, Photodiffraction and Spectromicroscopy$

Groupe Photoemission, Photodiffraction and Spectromicroscopy : LENSIS People Publications Collaborations Contracts Jobs We are part of the Service of Condensed Matter (SPEC) in the IRAMIS institute of the French Atomic Energy Commission (CEA). We focus on the study of the electronic and chemical structure of functional oxides. To do so we employ a wide array of photoemission-based surface analysis techniques such as XPS, ARPES and PEEM as well as electron probes such as LEEM.

Electrical boundary conditions : « Back to the Group page « Back to the Oxides page The new physics emerging from two-dimensional films in the limit of a few unit cells has a host of exciting applications. However, understanding the ferroelectric properties of such engineered thin film systems requires taking into account not only the material but also its interfaces with electrodes, substrates or atmosphere; in other words, the electrical boundary conditions.

Screening : « Back to the Group page « Back to the Oxides page Surface polarization charge in ferroelectric (FE) materials can be screened by a variety of mechanisms: intrinsic (charge carriers or defects in the bulk), extrinsic (chemical environment or adsorbates), domain ordering, or even a combination of the above. Chemisorption of OH- and protons can lead to important changes in the electrical boundary conditions and water film can play an active role in domain switching.