<p>Conceivably, an electron and a hole in germanium couldform a stable holeium state, in which they orbited around theircommon center of mass in a manner similar to a Bohr hydrogen atom.What would be the rough size of an "atom", and what would be itsionization energy? At what maximum temperature would be expected toobserve such a state?</p>
<p>The effective mass of electrons in Ge is <imgsrc="https://s3.amazonaws.com/answer-board-image/cramster-equation-201141482656343836636521267815313.gif"alt="" align="absmiddle" />.  The effective mass ofholes in Ge is <imgsrc="https://s3.amazonaws.com/answer-board-image/cramster-equation-2011414826576343836641790516583928.gif"alt="" align="absmiddle" />.  And the dielectricconstant of Ge is k=16.0</p>
<p>Conceivably, an electron and a hole in germanium couldform a stable holeium state, in which they orbited around theircommon center of mass in a manner similar to a Bohr hydrogen atom.What would be the rough size of an "atom", and what would be itsionization energy? At what maximum temperature would be expected toobserve such a state?</p>
<p>The effective mass of electrons in Ge is <imgsrc="https://s3.amazonaws.com/answer-board-image/cramster-equation-201141482656343836636521267815313.gif"alt="" align="absmiddle" />.  The effective mass ofholes in Ge is <imgsrc="https://s3.amazonaws.com/answer-board-image/cramster-equation-2011414826576343836641790516583928.gif"alt="" align="absmiddle" />.  And the dielectricconstant of Ge is k=16.0</p>
