Search: onr:"swepub:oai:DiVA.org:hig-23227" > Isotope effects on ...
Fältnamn | Indikatorer | Metadata |
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000 | 03309naa a2200361 4500 | |
001 | oai:DiVA.org:hig-23227 | |
003 | SwePub | |
008 | 170105s1998 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-232272 URI |
024 | 7 | a https://doi.org/10.1007/s1005100504152 DOI |
040 | a (SwePub)hig | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Rönnow, Danielu Max Planck Institut für Festkörperforschung, Stuttgart, Germany4 aut0 (Swepub:hig)dalrow |
245 | 1 0 | a Isotope effects on the electronic critical points of germanium :b Ellipsometric investigation of the E1 and E1+ Delta(1) transitions |
264 | 1 | b Springer Science and Business Media LLC,c 1998 |
338 | a print2 rdacarrier | |
520 | a Within the past years the optical excitations of electrons have been measured for semiconductor samples of different isotope compositions. The isotope shift observed have been compared with calculations of the effects of electron-phonon interaction on the electronic band structure. While qualitative agreement has been obtained, some discrepancies remain especially concerning the E1 and E1 + Delta(1) transitions. We have remeasured the effect of isotope mass on the E1 and E1 + Delta(1) transitions of germanium with several isotopic compositions. The results, obtained by means of spectroscopic ellipsometry, confirm that the real part of the gap self-energies induced by electron-phonon interaction is larger than found from band structure calculations, while the imaginary part agrees with those calculations, which are based on a pseudopotential band structure and a bond charge model for the lattice dynamics. Our results agree with predictions based on the measured temperature dependence of the gaps. We compare our data for E1 and E1 + Delta(1) with results for the lowest direct (E0) and indirect (E9) gaps. The measured values of Î0 and Î1 increase noticeably with increasing isotope mass. Similar effects have been observed in the temperature dependence of Delta(1) in alpha-Sn and GaSb. A microscopic explanation for this effect is not available. | |
650 | 7 | a TEKNIK OCH TEKNOLOGIERx Elektroteknik och elektronik0 (SwePub)2022 hsv//swe |
650 | 7 | a ENGINEERING AND TECHNOLOGYx Electrical Engineering, Electronic Engineering, Information Engineering0 (SwePub)2022 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
653 | a Electron energy levels; Electronic structure; Electrons; Ellipsometry; Energy gap; Isotopes; Phonons | |
653 | a Isotope effects | |
653 | a Semiconducting germanium | |
700 | 1 | a Lastras-Martínez, L. F.u Max Planck Institut für Festkörperforschung, Stuttgart, Germany4 aut |
700 | 1 | a Cardona, M.u Max Planck Institut für Festkörperforschung, Stuttgart, Germany4 aut |
710 | 2 | a Max Planck Institut für Festkörperforschung, Stuttgart, Germany4 org |
773 | 0 | t European Physical Journal Bd : Springer Science and Business Media LLCg 5:1, s. 29-35q 5:1<29-35x 1434-6028x 1434-6036 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-23227 |
856 | 4 8 | u https://doi.org/10.1007/s100510050415 |
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