  We study the thermoelectric transport under shear strain in two spatial
dimensional quantum matter using the holographic duality. General analytic
formulae for the DC thermoelectric conductivities subjected to finite shear
strain are obtained in terms of the black hole horizon data. Off-diagonal terms
in the conductivity matrix appear also at zero magnetic field, resembling an
emergent electronic nematicity which cannot nevertheless be identified with the
presence of an anomalous Hall effect. For an explicit model study, we
numerically construct a family of strained black holes and obtain the
corresponding nonlinear stress-strain curves. We then compute all electric,
thermoelectric, and thermal conductivities and discuss the effects of strain.
While the shear elastic deformation does not affect the temperature dependence
of thermoelectric and thermal conductivities quantitatively, it can strongly
change the behavior of the electric conductivity. For both shear hardening and
softening cases, we find a clear metal-insulator transition driven by the shear
deformation. Moreover, the violation of the previously conjectured thermal
conductivity bound is observed for large shear deformation.
