Recently, advanced materials with unusual electronic and/or magnetic
properties have been desired. Aperiodic crystals with long range ordered
atomic arrangements, for example, present interesting structural properties
for the functional materials above mentioned. Especially, in the composite
crystals with plural substructures, a variety of interesting properties
for superconductors or thermoelectric materials have been observed
because there are mutual lattice modulations between the substructures.
The (3+1)-dimensional superspace group symmetry is the most convenient
method to describe the modulated structures of aperiodic crystals.
By the use of the superspace group approach, the mechanism of hole
transfer in (Sr2Cu2O3)0.70CuO2,
"Sr14Cu24O41" has been
investigated.
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| Modulated composite structure
of (Sr2Cu2O3)0.70CuO2,
"Sr14Cu24O41". |
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| Relational Information |
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AIST Today Vol. 3, No. 3 (2003) 17
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No.8
Spring 2003
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