  We study the one-dimensional spin-1/2 Kitaev-Gamma model with a
bond-dependent Dzyaloshinskii-Moriya (DM) interaction, which can be induced by
an electric field applied in the third direction where the first and second
directions refer to the two bond directions in the model. By a combination of
field theory and symmetry analysis, an extended gapless phase with an emergent
SU(2)$_1$ conformal symmetry is found in the phase diagram of the spin-1/2
Kitaev-Gamma-DM chain. The analytic predictions are in good agreements with
numerical results obtained from density matrix renormalization group
simulations.
