Detail publikačního výsledku

The Čerenkov limit of Si, GaAs and GaP in electron energy loss spectrometry

HORÁK, M.; STÖGER-POLLACH, M.

Originální název

The Čerenkov limit of Si, GaAs and GaP in electron energy loss spectrometry

Anglický název

The Čerenkov limit of Si, GaAs and GaP in electron energy loss spectrometry

Druh

Článek WoS

Originální abstrakt

Since the advent of monochromated electron energy loss spectrometry (EELS) the experimental detection of band gaps in semiconducting materials is of great importance. In the non-relativistic limit of this technique the onset of the inelastic signal represents the band gap. But due to relativistic energy losses, like Čerenkov losses and the corresponding light guiding modes, appearing at high beam energies the band gap is usually hidden. The highest beam energy, which does not excite relativistic losses in a certain material, is called the Čerenkov limit of the material. In this work the low loss EELS signals of Si, GaAs and GaP are measured at various beam energies and the calculated Čerenkov limits are experimentally confirmed.

Anglický abstrakt

Since the advent of monochromated electron energy loss spectrometry (EELS) the experimental detection of band gaps in semiconducting materials is of great importance. In the non-relativistic limit of this technique the onset of the inelastic signal represents the band gap. But due to relativistic energy losses, like Čerenkov losses and the corresponding light guiding modes, appearing at high beam energies the band gap is usually hidden. The highest beam energy, which does not excite relativistic losses in a certain material, is called the Čerenkov limit of the material. In this work the low loss EELS signals of Si, GaAs and GaP are measured at various beam energies and the calculated Čerenkov limits are experimentally confirmed.

Klíčová slova

Low voltage EELS; Band gap; Čerenkov radiation

Klíčová slova v angličtině

Low voltage EELS; Band gap; Čerenkov radiation

Autoři

HORÁK, M.; STÖGER-POLLACH, M.

Rok RIV

2016

Vydáno

06.06.2015

ISSN

0304-3991

Periodikum

ULTRAMICROSCOPY

Svazek

157

Číslo

1

Stát

Nizozemsko

Strany od

73

Strany do

78

Strany počet

6

BibTex

@article{BUT115185,
  author="Michal {Horák} and Michael {Stöger-Pollach}",
  title="The Čerenkov limit of Si, GaAs and GaP in electron energy loss spectrometry",
  journal="ULTRAMICROSCOPY",
  year="2015",
  volume="157",
  number="1",
  pages="73--78",
  doi="10.1016/j.ultramic.2015.06.005",
  issn="0304-3991"
}