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The field of low-dimensional conductors has been very active for
more than twenty years. It has grown continuously and both the
inorganic and organic materials have remark able properties, such
as charge and spin density waves and superconductivity. The
discovery of superconductivity at high temperature in copper-based
quasi two-dimensional conducting oxides nearly ten years ago has
further enlarged the field and stimulated new research on inorganic
conductors. It was obviously impossible to cover such a broad field
in a ten day Institute and it seemed pertinent to concentrate on
inorganic conductors, excluding the high Tc superconducting oxides.
In this context, it was highly desirable to include both physics
and chemistry in the same Institute in order to tighten or in some
cases to establish links between physicists and chemists. This
Advanced Study Institute is the continuation of a series of similar
ones which have taken place every few years since 1974. 73
participants coming from 13 countries have taken part in this
School at the beautiful site of the Centre de Physique des Houches
in the Mont-Blanc mountain range. The scientific programme included
more than forty lectures and seminars, two poster sessions and ten
short talks. Several discussion sessions were organized for the
evenings, one on New Materials, one on New Topics and one on the
special problem of the Fermi and Luttinger liquids. The scientific
activity was kept high from the beginning to the end of the
Institute."
The field of low-dimensional conductors has been very active for
more than twenty years. It has grown continuously and both the
inorganic and organic materials have remark able properties, such
as charge and spin density waves and superconductivity. The
discovery of superconductivity at high temperature in copper-based
quasi two-dimensional conducting oxides nearly ten years ago has
further enlarged the field and stimulated new research on inorganic
conductors. It was obviously impossible to cover such a broad field
in a ten day Institute and it seemed pertinent to concentrate on
inorganic conductors, excluding the high Tc superconducting oxides.
In this context, it was highly desirable to include both physics
and chemistry in the same Institute in order to tighten or in some
cases to establish links between physicists and chemists. This
Advanced Study Institute is the continuation of a series of similar
ones which have taken place every few years since 1974. 73
participants coming from 13 countries have taken part in this
School at the beautiful site of the Centre de Physique des Houches
in the Mont-Blanc mountain range. The scientific programme included
more than forty lectures and seminars, two poster sessions and ten
short talks. Several discussion sessions were organized for the
evenings, one on New Materials, one on New Topics and one on the
special problem of the Fermi and Luttinger liquids. The scientific
activity was kept high from the beginning to the end of the
Institute.
For many years it was believed that translational symmetry would be
the fundamental property of crystal structures of natural and
synthetic compounds. It is now recognised that many compounds
crystallise without translational symmetry of their atomic
structures. "Incommensurate Crystallography" gives a comprehensive
account of the superspace theory for the description of crystal
structures and symmetries of these incommensurately modulated
crystals and incommensurate composite crystals. It thus provides
the necessary background for quantitative analysis of
incommensurate crystals by methods in Solid State Chemistry and
Solid State Physics. The second half of "Incommensurate
Crystallography" is devoted to crystallographic methods of
structural analysis of incommensurate compounds. Thorough accounts
are given of the diffraction by incommensurate crystals, the choice
of parameters in structure refinements, and the use of superspace
in analysing crystal structures. The presentation of methods of
structure determination includes modern methods like the Maximum
Entropy Method and Charge Flipping.
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