  We investigate quantum dots in semiconductor PbTe nanowire devices. Due to
the accessibility of ambipolar transport in PbTe, quantum dots can be occupied
both with electrons and holes. Owing to a very large dielectric constant in
PbTe of order 1000, we do not observe Coulomb blockade which typically
obfuscates the orbital and spin spectra. We extract large and highly
anisotropic effective Lande g-factors, in the range 20-44. The absence of
Coulomb blockade allows direct readout, at zero source-drain bias, of
spin-orbit hybridization energies of up to 600 microelectronvolt. These spin
properties make PbTe nanowires, the recently synthesized members of group IV-VI
materials family, attractive as a materials platform for quantum technology,
such as spin and topological qubits.
