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Diamagnetism in quasicrystals |
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| Authors: | YuKh Vekilov B Johansson |
| Institution: | a Theoretical Physics Department, Moscow State Institute of Steel and Alloys (Technological University), 4, Leninskii prospect, 119049 Moscow, Russian Federation b Condensed Matter Theory Group, Uppsala University, SE-751 21 Uppsala, Sweden c Department of Materials Science and Engineering, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden |
| Abstract: | 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. |
| Keywords: | 71 23 Ft 75 20 &minus g |
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