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Diamagnetism in quasicrystals

机译:准晶体中的反磁性

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A reliable explanation of diamagnetism in quasicrystals is given. We show that the weak diamagnetism in perfect icosahedral quasicrystals is due to an atomic-like diamagnetic contribution of tightly bound conduction electrons in electron pockets of a multiconnected Fermi surface. The Landau-Peierls diamagnetic term is small due to large effective masses. At temperatures above the Debye temperature the intervalley electron-phonon scattering makes the electrons 'free', and the temperature dependence of the Pauli paramagnetism related to a pseudogap in the density of states at the Fermi level becomes important. (C) 2004 Elsevier Ltd. All rights reserved.
机译:给出了准晶体中反磁性的可靠解释。我们表明,在理想的二十面体准晶体中弱的反磁性是由于多连接费米表面的电子腔中紧密结合的传导电子的原子状反磁性作用所致。由于有效质量大,Landau-Peierls的反磁性项很小。在高于德拜温度的温度下,间隔电子声子散射使电子“自由”,与费米能级上的伪间隙相关的泡利顺磁性的温度依赖性变得很重要。 (C)2004 Elsevier Ltd.保留所有权利。

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