Download PDF by Joachim Wosnitza: Fermi Surfaces of Low-Dimensional Organic Metals and

By Joachim Wosnitza

ISBN-10: 3540606742

ISBN-13: 9783540606741

Fermi Surfaces of Low-Dimensional natural Metals and Superconductors is an advent to quasi-one- and quasi-two-dimensional natural metals and a evaluate of the present wisdom at the digital constitution of those fabrics. The vital structural, digital, and superconducting houses are defined and illustrated with many examples. The ebook introduces the fundamental theoretical options helpful for the certainty of the experimental thoughts and stories intimately contemporary ends up in the research of the Fermi floor topology. The booklet is meant either as an advent and as a reference ebook for lively researchers.

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Extra resources for Fermi Surfaces of Low-Dimensional Organic Metals and Superconductors

Example text

In the ac-susceptibility experiment consistent with [221,222, 223] a T 2 variation is found• This non-exponential non~BCS dependence can be explained with energy-gap nodes of several different topologies [222]. On the other hand, the data of [227] could very well be described by conventional weak-coupling theory in the clean limit as shown 56 2. Some Principal Properties by the solid line in Fig. 34b. The broken lines represent model curves for two triplet states denoted tl and t4 after Ref. [222].

V(/~ 3) Z Ref. 1 - - ~-IBr2 ~-I3 - superstr. ~-I3 t~-Cu(NCS)2 a-T1Hg(SCN)a a-KHg(SCN)4 a-NH4Hg(SCN)4 a-aHg(SeeN)4 a-RbHg(SCN)4 a-T1Hg(SeCN)4 in this "average" structure approximately 2% of I~ are replaced by AuI~. See also [33]. b here the usually stated values are given independent from the experimental determination of To. The actual thermodymanic values may differ slightly. When correlating Tc and structural parameters of the fl phase salts it was found t h a t the linear anion length and Tc are proportional to eac:h other [126].

6 K [148] (see also the discussion in [33]). There, however, two neighboring E T layers are nonequivalent. The molecules are tilted by N 20 ° from plane to plane. Within the layer the donors in each stack are centrosymmetric leading to an orthorhombic structure. In a subsequent report, however, a monoclinic cell twice as large was proposed to describe all atomic positions of the iodine [149]. 34 2. 2 B a n d S t r u c t u r e The general remarks in Sect. 2 given for the 1D organic metals are in principle also relevant for the 2D materials.

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Fermi Surfaces of Low-Dimensional Organic Metals and Superconductors by Joachim Wosnitza


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