Speaker
Amnon Aharony
(Tel Aviv University)
Description
SrTiO$_3$ and LaAlO$_3$ undergo structural phase transitions from a cubic trructure to lower symmetry structures. These transitions can be affected by uniaxial stress. Following original work by Alex Mueller, I have worked on these transitions since 1973. Many details depend on whether the 3-component cubic problem is dominated by the isotropic or by the cubic fixed point. Most of the past literature assumed that the former dominates. Following discussions with Slava Rychkov, I realized that it is now believed that the latter wins. This talk will discuss the consequences of this change, and the experimental possibilities to test it.
Author
Amnon Aharony
(Tel Aviv University)