  This study investigates new technology for enhancing the sensitivity of
low-mass dark matter detection by analyzing charge transport in a p-type
germanium detector at 5.2 K. To achieve low-threshold detectors, precise
calculations of the binding energies of dipole and cluster dipole states, as
well as the cross-sections of trapping affected by the electric field, are
essential. The detector was operated in two modes: depleted at 77 K before
cooling to 5.2 K and cooled directly to 5.2 K with various bias voltages. Our
results indicate that the second mode produces lower binding energies and
suggests different charge states under varying operating modes. Notably, our
measurements of the dipole and cluster dipole state binding energies at zero
fields were $8.716\pm 0.435$ meV and $6.138\pm 0.308$ meV, respectively. These
findings have strong implications for the development of low-threshold
detectors for detecting low-mass dark matter in the future.
