Condensed Matter Physics Seminar: Lev Melnikovsky

Abstract: On the P,T diagram of UTe2, three lines of continuous phase transitions
between the normal phase and two distinct superconducting phases meet at
a single point. Such triple points of second-order phase transitions
have never been observed before and, in fact, severe restrictions on
their properties were assumed to exist. We show that Bose condensation
of bound states of eight (or even more) electrons may provide a natural
description of such a phase diagram within Landau theory of second-order
phase transitions.
Based on the joint work with V.Marchenko