منابع مشابه
superconductivity ∗
We present a 2+1-dimensional lattice model for the copper oxide superconductors and their parent compounds, in which both the charge and spin degrees of freedom are treated dynamically. The spin-charge coupling parameter is associated to the doping fraction in the cuprates. The model is able to account for the various phases of the cuprates and their properties, not only at low and intermediate...
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Background & aim: Forensic midwifery is a new major which has been established in response to the need of endangered women for forensic services and also the lack of service provision in this domain. However, there are ambiguities in the definition of this major and its scope of practice. The present study was conducted to investigate the scope of practice in forensic ...
متن کاملSuperconductivity and Electric Fields: a Relativistic Extension of Bcs Superconductivity
The effects of static electric fields on the superconducting state are studied within a relativistic extension of the BCS theory of superconductivity.
متن کاملStudying the research scope of mathematics education specialists using keywords
Background and aim: Due to the importance of keywords in the field of research and scientometrics, the keywords used in scientific outputs of mathematics education specialists were investigated in this study to determine the scope of their research. Material and methods: This cross-sectional study was conducted on the Persian scientific papers published by mathematics education specialists who ...
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ژورنال
عنوان ژورنال: Nature
سال: 1970
ISSN: 0028-0836,1476-4687
DOI: 10.1038/225109a0