Zero-Field Long Range Order at $T\sim 40$ mK in the Proximate Quantum Spin Ice Ce${}_2$Sn${}_2$O${}_7$ and Phase Diagram for Magnetic Fields Along [1,1,0]

E. M. Smith, M. S. Powell, R. Schäfer +4

The Ce${}^{3+}$ pseudospin-1/2 degrees of freedom in the pyrochlore magnets Ce${}_2$X${}_2$O${}_7$, with $X$ = Zr, Hf, or Sn, possess dipole-octupole character. The XYZ nearest-neighbor mo…