2DEGs at Perovskite Interfaces between KTaO3 or KNbO3 and Stannates
نویسندگان
چکیده
منابع مشابه
2DEGs at Perovskite Interfaces between KTaO3 or KNbO3 and Stannates
We report density functional studies of electron rich interfaces between KTaO3 or KNbO3 and CaSnO3 or ZnSnO3 and in particular the nature of the interfacial electron gasses that can be formed. We find that depending on the details these may occur on either the transition metal or stannate sides of the interface and in the later case can be shifted away from the interface by ferroelectricity. We...
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We use molecular-dynamics simulation to examine the order-disorder behavior in pure ferroelectric KNbO3 and in KNbO3-KTaO3 ferroelectric-paraelectric solid solutions and superlattices. We find that the order-disorder behavior is remarkably robust and plays an important role in both the polarization rotation associated with switching of the perfect crystal and in the dynamical behavior of the so...
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متن کاملFirst-principles and semiempirical Hartree-Fock calculations for F centers in KNbO3 and Li impurities in KTaO3
The linear muffin-tin-orbital method based on the density-functional theory and the semi-empirical method of the Intermediate Neglect of the Differential Overlap based on the Hartree–Fock formalism are used for the supercell study of the F centers in cubic and orthorhombic ferroelectric KNbO3 crystals. Two electrons are found to be considerably delocalized even in the ground state of the defect...
متن کاملSubband structure of a two-dimensional electron gas formed at the polar surface of the strong spin-orbit perovskite KTaO3.
We demonstrate the formation of a two-dimensional electron gas (2DEG) at the (100) surface of the 5d transition-metal oxide KTaO3. From angle-resolved photoemission, we find that quantum confinement lifts the orbital degeneracy of the bulk band structure and leads to a 2DEG composed of ladders of subband states of both light and heavy carriers. Despite the strong spin-orbit coupling, our measur...
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ژورنال
عنوان ژورنال: PLoS ONE
سال: 2014
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0091423