1994
DOI: 10.1103/physrevb.50.2653
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Impurity band inp-type β-FeSi2

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Cited by 101 publications
(80 citation statements)
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“…6 Very recently, however, some luminescence has been successfully measured in ion-beam-synthetized samples, 7 whereas larger mobilities ͑up to 60 times larger than in films͒ and low-temperature photoconductivity were observed in single-crystalline specimens. 8 Furthermore, theoretical studies emphasized that if an indirect gap is present in the equilibrium configuration, slightly smaller than the direct one, 9 the situation may be reversed by the presence of strain, due to the large coupling between the electronic bands and the lattice distortions. 10 Therefore, it is clear that a better understanding of ␤-FeSi 2 single crystals is necessary in order to assess the intrinsic properties and to share the new effects induced by the epitaxial configuration.…”
Section: Introductionmentioning
confidence: 99%
“…6 Very recently, however, some luminescence has been successfully measured in ion-beam-synthetized samples, 7 whereas larger mobilities ͑up to 60 times larger than in films͒ and low-temperature photoconductivity were observed in single-crystalline specimens. 8 Furthermore, theoretical studies emphasized that if an indirect gap is present in the equilibrium configuration, slightly smaller than the direct one, 9 the situation may be reversed by the presence of strain, due to the large coupling between the electronic bands and the lattice distortions. 10 Therefore, it is clear that a better understanding of ␤-FeSi 2 single crystals is necessary in order to assess the intrinsic properties and to share the new effects induced by the epitaxial configuration.…”
Section: Introductionmentioning
confidence: 99%
“…An acceptor level in ␤-FeSi 2 is reported by several authors. 35,36 Quantitative details of the energy balance will follow after the interpretation of the excitonic transition 0.809 eV ͑2 K͒. The transition at 0.809 eV, as mentioned above, has a linewidth of 10 meV ͑2 K͒ and, as we have seen in Fig.…”
Section: Resultsmentioning
confidence: 84%
“…[12]. It is worth mentioning that a high concentration of deep acceptor levels was also observed in undoped [4] and Al-doped b-FeSi 2 single crystals [5].…”
Section: Resultsmentioning
confidence: 96%
“…Using Eq. (1), the values of N A 2 and e 2 were calculated in accordance with the method, presented in [5]. The obtained values of…”
Section: Resultsmentioning
confidence: 99%
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