Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Composition-induced structural instability and strong-coupling
  superconductivity in Au1-xPdxTe2   The physical properties and structural evolution of the MX$_2$-type solid
solution Au$_{1-x}$Pd$_x$Te$_2$ are reported. The end member AuTe$_2$ is a
normal metal with a monoclinic distorted CdI$_2$-type structure with preformed
Te-Te dimers. A monoclinic--trigonal structural phase transition at a finite
temperature occurs upon Pd substitution and is suppressed to zero temperature
near $x$ = 0.55, and a superconducting phase with a maximum $T_{\rm c}$ = 4.65
K emerges. A clear indication of strong coupling superconductivity is observed
near the composition of the structural instability. The competitive
relationship between Te-Te dimers and superconductivity is proposed.

20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics