  To probe the peculiar excitations spinons and magnetic monopoles in the
quantum spin ice candidate Pr2Zr2O7, we studied the low-temperature thermal
Hall conductivity (\k{appa}xy) and thermal conductivity (\k{appa}xx) of
Pr2Zr2O7 single crystal with magnetic fields applied along the [111] axis. The
magnetic field dependencies of \k{appa}xx suggest the roles of magnetic
excitations in thermal conductivity, that is, the emergent magnetic monopoles
can transport heat at T > 1.4 K and spinons mainly scatter phonons at lower
temperatures. The finite \k{appa}xy was observed at low fields of several Tesla
and was discussed to be related to the magnetic excitations, including magnetic
monopoles as well as spinons.
