Predicted pressure-induced s-band ferromagnetism in alkali metals.
نویسندگان
چکیده
First-principles density-functional-theory calculations show that compression of alkali metals stabilizes open structures with localized interstitial electrons which may exhibit a Stoner-type instability towards ferromagnetism. We find ferromagnetic phases of the lithium-IV-type, simple cubic, and simple hexagonal structures in the heavier alkali metals, which may be described as s-band ferromagnets. We predict that the most stable phases of potassium at low temperatures and pressures around 20 GPa are ferromagnets.
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عنوان ژورنال:
- Physical review letters
دوره 107 8 شماره
صفحات -
تاریخ انتشار 2011