Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of superconductivity in isovalent Te-substituted KxFe2-ySe2
  crystals   We report the evolution of superconductivity and the phase diagram of the
KxFe2-ySe2-zTez (z=0-0.6) crystals grown by a simple one-step synthesis. No
structural transition is observed in any crystals, while lattice parameters
exhibit a systematic expansion with Te content. The Tc exhibits a gradual
decrease with increasing Te content from Tconset = 32.9 K at z = 0 to Tconset =
27.9 K at z = 0.5, followed by a sudden suppression of superconductivity at z =
0.6. Upon approaching a Te concentration of 0.6, the shielding volume fraction
decreases and eventually drops to zero. Simultaneously, hump positions in r-T
curve shift to lower temperatures. These results suggest that isovalent
substitution of Te for Se in KxFe2-ySe2 crystals suppresses the
superconductivity in this system.

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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin