Speaker
chen wei
(Memorial University of Newfoundland)
Description
Pyrochlores have the chemical formula A$_2$B$_2$O$_7$ with A, B or both magnetic. It has corner-sharing tetrahedra in the structure, therefore, frustration phenomena naturally occurs in these systems. Because of the frustration, pyrochlore have many interesting properties, including the spin glass in Y$_2$Mo$_2$O$_7$, spin liquid in Tb$_2$Ti$_2$O$_7$, disordered spin ice in Ho$_2$Ti$_2$O$_7$, and ordered spin ice in Tb$_2$Sn$_2$O$_7$. I will focus on Tb$_2$Ti$_2$O$_7$ particularly, use perturbation theory to find the spin correlation function between the nearest neighbour for the spin $1/2$ system.
Author
chen wei
(Memorial University of Newfoundland)
