Professor
Marc Gabay


                                                       

Laboratoire de Physique des Solides, Bât. 510
Université Paris-Sud 11

    
   

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                         Axe 1: Nouveaux états électroniques
                                           de la matière


                                        
Goodbye electronics, Hello oxitronics! This spin-off in materials science combines state of the art fundamental and applied research in oxide-based, next generation, electronic devices. Hence the name oxitronics that we created (a contraction of oxide and electronics). The recipe is simple.
 Just grow a good insulating material (LaAlO
3) on top of a good ....insulating substrate (SrTiO3),
and, lo and behold,
you may observe superconductiviy at the interface.
Would you care to learn more
about this topic? Then check this
highlight and the text on my 
webpage.
 
An article appeared in
 the 
April 2013 issue of the general
public science magazine
Pour la
Science (79,2013)

induced
                                            magnetic polarization near a
                                            non magnetic defect



In materials with strong local Coulomb interactions, simple
defects such as atomic substitutions strongly affect both
macroscopic and local properties of the system. In 1D and in 2D (shown in the figure), a nonmagnetic impurity, for instance, is seen to induce magnetism nearby  (grey dot on the figure). This spectacular effect is described in a review article
  (Reviews of Modern Physics).

The Cu-O cells, in the copper oxide compound SrCu2O3, form a pattern known as a two-leg ladder. Upon hole doping, there exists a range of carrier concentration where the ground state structure consists of an incommensurate array of orbital currents superimposed on a spin-density wave. This phase is a quantum critical regime.
Phys. Rev. B 76, 161101 (R)  (2007)