Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strain-induced transformation of charge-density waves and mechanical
  anomalies in the quasi one-dimensional conductors TaS_3 and K_{0.3}MoO_3   We report studies of low-field conductivity, sigma, of the orthorhombic TaS_3
samples as a function of strain, epsilon. In the Peierls state the
sigma(epsilon) dependencies show hysteresis. A similar hysteresis loop is
observed for K_{0.3}MoO_3. For nano-sized TaS_3 samples the sigma(epsilon)
curves show step-like changes associated with the "quantization" of the wave
vector, q, of the charge-density wave (CDW). The dependences clearly reveal the
change of the q-vector with strain. In contrast with the traditional concept, q
is found to increase with sample expansion. This means that the stretch-induced
anomalies cannot be explained by the transition of the CDW to fourfold
commensurability with the pristine lattice (lock-in transition). Alternatively,
we suppose, that at the critical stretch a CDW with larger amplitude and
modified q-vector forms. Further, the models describing metastable length
states and drop of the Young modulus on CDW depinning in terms of longitudinal
CDW strain, require reconsideration. Presumably, transverse effects should be
taken into account.

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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph