Exotic specific heat anomaly in the GdY system: A probable signature of the Lifshitz transitionстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.
Аннотация:The order-order magnetic phase transition “helical antiferromagnet–ferromagnet” in the GdxY1−x system have been examined by means of the specific heat vs temperature. The observed anomaly in the specific heat does not follow the ordinary second-order transition scenario but resembles the exotic second-and-a-half–order behavior, according to the Ehrenfest’s classification of the phase transitions. Such a behavior was first predicted for the Lifshitz electronic topological transition. We suggest that the observed anomaly is likely a product of the underlying Lifshitz transition associated with the magnetic phase transition.