Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Barkhausen effect in the first order structural phase transition in
  type-II Weyl semimetal MoTe2   We report the first observation of the non-magnetic Barkhausen effect in van
der Waals layered crystals, specifically, between the Td and 1T' phases in
type-II Weyl semimetal MoTe2. Thinning down the MoTe2 crystal from bulk
material to about 25nm results in a drastic strengthening of the hysteresis in
the phase transition, with the difference in critical temperature increasing
from 40K to more than 300K. The Barkhausen effect appears for thin samples and
the temperature range of the Barkhausen zone grows approximately linearly with
reducing sample thickness, pointing to a surface origin of the phase pinning
defects. The distribution of the Barkhausen jumps shows a power law behavior,
with its critical exponent {\alpha} = 1.27, in good agreement with existing
scaling theory. Temperature-dependent Raman spectroscopy on MoTe2 crystals of
various thicknesses shows results consistent with our transport measurements.

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The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
2
The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th