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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 12 (1990), S. 649-655 
    ISSN: 0392-6737
    Keywords: Kinetic and transport theory ; Classical, semiclassical, quantum theories of liquid structure ; Studies of specific liquid structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro si studiano le proprietà strutturali di elementi liquidi di gruppo V (ed un composto InSb) e si analizzano le differenze con le loro fasi cristalline a temperatura ambiente. Si fanno esperimenti di diffrazione dei neutroni usando neutroni a breve lunghezza d'onda (0.7 Å). Si mostrano i diversi comportamenti in fusione di un elemento leggero (As) e di un elemento pesante (Sb) in studio. Mentre As mantiene la sua coordinazione tre sopra fusione, Sb ha coordinazione 6 in fusione. Similmente InSb ha numero di coordinazione in aumento da 4 a circa 6 sopra fusione. Grandi entropie di fusione sono in relazione con importanti variazioni strutturali.
    Abstract: Резюме В этой работе мы исследуем структурные свойства жидких элементов группы V (и соединения InSb). Мы анализируем различия их кристаллических фаз при комнатной температуре. Проводятся эксперименты по дифракции нейтронов, исполъзуя нейтроны с короткой длиной волны (0.7 Å). Мы обнаруживаем различные поведения при плавлении для легкого элемента (As) и для тяжелого элемента (Sb). Тогда как As сохраняет координационное число три при плавлении, Sb является шестикоординированным в расплаве. Аналогично, InSb имеет координационное число, которое увеличивается от 4 до 6 при плавлении. Большие энтропии расплавов связаны с существенными изменениями структуры.
    Notes: Summary In this paper, we study the structural properties of liquid group-V elements (and a compound InSb) and we analyse the differences with their room temperature crystalline phases. Neutron diffraction experiments are performed using short-wavelength neutrons (0.7 Å). We show different melting behaviours of a light element (As) and a heavy element (Sb) under study. Whereas As keeps its coordination three upon melting, Sb is six-coordinated in the melt. Similarly, InSb has a coordination number increasing from 4 to about 6 upon melting. Large entropies of melting are related to important structural variations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 28 (1977), S. 43-46 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the moment method and the continued fraction expansion for the one-particle Green's function we have studied thed-electron surface density of states for a transition metal. Besides the reduction of nearest neighbours for a surface atom compared to a bulk atom we have also taken into account the effect that the atomic environment of a surface atom is quite different from that of a bulk atom. This leads to important modifications in the surface density of states which can effect e.g. magnetic surface properties.
    Type of Medium: Electronic Resource
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