Potential distributions around a moving test charge in quantum plasmas

By using the dielectric response function of quantum electron plasmas, potential distributions around a moving test charge are calculated. The near-field potential follows the modified Debye-Huckel potential, while the far-field potential turns out to be oscillatory. Both the Debye-Huckel and wake potentials strongly depend on the Fermi energy and the electron quantum correlation strength. The relevance of the present investigation to semiconductor plasmas is discussed. (c) 2006 American Institute of Physics.