Corpus ID: 119231452

Uniaxially stressed germanium with fundamental direct band gap

@inproceedings{Geiger2015UniaxiallySG,
  title={Uniaxially stressed germanium with fundamental direct band gap},
  author={R. Geiger and Thomas F. Zabel and Ernesto Mar{\'i}n and Alban Gassenq and J. M. Hartmann and J. Widiez and Jos{\'e} Maria Escalante and Kevin Guilloy and Nicolas Pauc and Denis Rouchon and Giacomo Diaz and Samuel Tardif and F. Rieutord and Ivan Duchemin and Y. Niquet and V Reboud and Vincent Calvo and Alexei Chelnokov and J{\'e}r{\^o}me Faist and Hans Sigg},
  year={2015}
}
  • R. Geiger, Thomas F. Zabel, +17 authors Hans Sigg
  • Published 2015
  • Physics
  • We demonstrate the crossover from indirect- to direct band gap in tensile-strained germanium by temperature-dependent photoluminescence. The samples are strained microbridges that enhance a biaxial strain of 0.16% up to 3.6% uniaxial tensile strain. Cooling the bridges to 20 K increases the uniaxial strain up to a maximum of 5.4%. Temperature-dependent photoluminescence reveals the crossover to a fundamental direct band gap to occur between 4.0% and 4.5%. Our data are in good agreement with new… CONTINUE READING

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