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Structural Study of CuNCN and Its Theoretical Implications: A Case of a Resonating-Valence-Bond State?статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
- Авторы: Tchougréeff A.L., Liu X., Müller P., van Beek W., Ruschewitz U., Dronskowski R.
- Журнал: Journal of Physical Chemistry Letters
- Том: 3
- Год издания: 2012
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 3360
- Последняя страница: 3366
- DOI: 10.1021/jz301722b
- Аннотация: We present the results of a high-resolution low-temperature synchrotron structural study of the nitrogen-containing analogue of cupric oxide, copper carbodiimide (CuNCN). The material clearly manifests a surprising nonmonotonous behavior of the a lattice parameter as a function of the temperature: its decrease with decreasing temperature turns to a distinguishable increase below 100 K. The onset temperature of this anomaly nearly coincides with that of the onset of the activation temperature dependence, as seen from the magnetic susceptibility, which has been tentatively attributed to the formation of a gapped 2D spin-liquid (resonating-valence-bond) state. In accord with this assumption, we develop a theory relating the temperature behavior of the spin susceptibility to that of the lattice parameter, which semiquantitatively agrees with the observed behavior.
- Добавил в систему: Чугреев Андрей Львович