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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 1-2 (Jan. 1991), p. 1-9 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 83-87 (Jan. 1992), p. 1069-1074 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 979-988 
    ISSN: 0392-6737
    Keywords: Optical properties and materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro si riportano e discutono misure di riflettanza ed elettroriflettanza, nell'intervallo (2.5÷5.5) eV, eseguite sui campioni di silicio pesantemente drogato con arsenico. I campioni di silicio, impiantati con arsenico fino a una dose di 1017cm−2, sono stati sottoposti a laser annealing e sono state raggiunte concentrazioni di portatori liberi dell'ordine di 1021cm−3. Il riordinamento del sistema è studiato in dettaglio in corrispondenza a diverse condizioni iniziali e un confronto fra riflettanza ed elettroriflettanza appare molto utile per determinare il comportamento di un semiconduttore pesantemente drogato.
    Abstract: Резюме Приводятся и обсуждаются результаты измерений отражения и электроотражения в области от 2.5 до 5.5 эВ на образцах кремния, сильно легированных мишьяком. Кристаллы кремния, имплантированные мышьяком с флуенсом 1017cm−2, облучаются лазером и концентрация свободных носителей достигает порядка 1021cm−3. При различных началыных условиях подробно исследуется переупорядочение системы. Сравнение отражения и электроотражения оказывается поленым для определения поведения сильно легированных полупроводников.
    Notes: Summary Reflectance and electroreflectance measurements from 2.5 to 5.5 eV, performed on arsenic heavily doped silicon samples, are reported and discussed. Silicon crystals implanted with arsenic up to a fluence of 1017 cm−2 were laser irradiated and a free-carrier concentration of the order of 1021cm−3 was reached. The reordering of the system is studied in detail at different initial conditions. A comparison between reflectance and electro-reflectance appears to be quite useful to determine the behaviour of the heavily doped semiconductor.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 4 (1984), S. 141-152 
    ISSN: 0392-6737
    Keywords: Optical properties and materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Sono state studiate, mediante la tecnica della termoriflettanza, le principali strutture dello spettro interbanda dei cristalli Ti1−x Hf x Se2 (0≤x≤0.3 ex=1), fra 1 e 9 eV. Si sono così ottenute nuove indicazioni circa la corrispondenza fra gli spettri interbanda del TiSe2 e dell'HfSe2. Si riportano in dettaglio e discutono i dati di termoriflettanza a valori intermedi dix con evidenza di possibili effetti di «bowing». Non sono stati osservati apprezzabili effetti della transizione di fase a 200 K ad energie superiori a 2 eV.
    Abstract: Резюме Исследуются главные особенности междузонных спектров кристаллов Ti1−xHf x Se2 (0≤x≤0.3 иx=1) с помощью техники термоотражения в области от 1 до 9 эВ. Приводятся новые данные о соответствии между междузонными спектрами TiSe2 и HfSe2. Подробно обсуждаются данные при промежуточных значенияхx. Не наблюдаются заметные эффекты фазового перехода при 200 К в TiSe2 при энергиях выше 2 эВ.
    Notes: Summary The main structures of interband spectra of Ti1−x Hf x Se2 crystals (0≤x≤0.3 andx=1) have been investigated by means of thermoreflectance from 1 to 9 eV. New indications about the correspondence of the interband spectra of TiSe2 and HfSe2 are given. Detailed data at intermediate stoichiometries, which give also evidence of possible bowing effects, are reported and discussed. No relevant effect of the 200 K phase transition in TiSe2 is observable above 2 eV.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 5 (1985), S. 292-303 
    ISSN: 0392-6737
    Keywords: Optical properties and materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro sono riportati e discussi gli spettri di riflettanza (R) e termoriflettanza (TR) in infrarosso di campioni di silicio drogati pesantemente per diffusione con P e B. Dai dati sono ricavati i valori dei tempi di rilassamento e della massa effettiva, come pure la derivata in temperatura della frequenza di plasma, del tempo di rilassamento e della costante dielettrica ad alta frequenza, che sono analizzati sulla base delle interazioni fra portatori liberi e fononi e fra portatori liberi e impurezze.
    Notes: Summary In this work reflectance (R) and thermoreflectance (TR) spectra in the infra-red of bulk P and B heavily doped silicon samples are reported and discussed. The values of the scattering time and of the effective mass, as well as the temperature derivative of the plasma frequency, scattering time and high-frequency dielectric constant are extracted from the data and analysed in terms of free-carrier-photon and free-carrier-impurity interaction.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 1487-1496 
    ISSN: 0392-6737
    Keywords: Optical properties and materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro si presentano recenti misure FTIR relative allo stretching del legame Si−O ed al bending dei legami Si−O−Si O−Si−O in film amorfi di biossido di silicio. Si paragonano i risultati ottenuti per film cresciuti secondo differenti tecniche: APCVD, LPCVD, PACVD ed, infine, ossidazione termica. Si studia inoltre l’effetto dell’annealing termico sullo spettro ottico di assorbanza.
    Notes: Summary In this work we report new FTIR absorbance measurements due to Si−O stretching bond, Si−O−Si and O−Si−O bending bonds of silicon dioxide amorphous films. We compare the optical results obtained from films grown by APCVD, LPCVD, PACVD and thermal oxidation techniques. The effect of thermal annealing on optical obsorbance structures has been studied.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 14 (1992), S. 33-39 
    ISSN: 0392-6737
    Keywords: Other optical properties of bulk materials ; Impurity and defect absorption in solids ; Magnetic semiconductors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We report the absorption edge spectra of the new family of diluted magnetic semiconductors Cd1−x Mn x Ga2Se4 (0≤x≤1), grown from the vapour phase by chemical transport. Absorption bands observed under the gap of CdGa2Se4 are attributed to intra-Mn2+ transitions involving excited states of the 3d 5 electrons, split by the crystal field.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 169-176 
    ISSN: 0392-6737
    Keywords: Optical properties of bulk materials ; Electronic properties of specific thin films ; Optical instruments and techniques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Ellipsometric measurements on TaSi2 polycrystalline films are presented in this paper. The optical functions are directly obtained in the wavenumber range from 400 to 3000 cm−1 using an infrared ellipsometer coupled with a Fourier transform spectrometer. The analysis of the results provides the spectral range where the infrared response has a Drude-like behaviour. Finally, the optical resistivity at zero frequency is evaluated from the Drude parameters.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 75 (1979), S. 121-124 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 185 (1994), S. 431-434 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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