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Except where otherwise noted, this item's license is described as: All papers in Condensed Matter Physics journal are published under the terms of the Creative Commons Attribution 4.0 International License (CC-BY) with the authors retaining a copyright to their articles. This license permits anyone to copy, distribute, transmit, and adapt an article’s content, without obtaining permission from the author(s) or CMP journal, provided a proper attribution is given to the author(s) and to the source of the material. Please check full license terms and requirements at https://creativecommons.org/licenses/by/4.0/.