Parton construction for Dipolar-Octupolar spin liquids in pyrochlore

We study the uniform U (1) quantum spin liquid (QSL) with low-energy fermionic quasiparticles for pyrochlore magnets with dipolar-octupolar symmetry, employing a fermionic parton mean field theory approach. Self-consistent calculations stabilize an uniform U (1) QSL with both gapped and gapless parton excitations. We analyse parton mean field solutions both with and without time-reversal symmetry. In the stable U(1) QSL ground state we charecterise low-temperature specific heat behaviour that could be unique signature of these fermionic U(1) QSL phases. Thus, this provides a possible way to understand the metallic specific heat response in Nd₂ScNbO₇.