Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two distinct superconducting states controlled by orientation of local
  wrinkles in LiFeAs   We observe two types of superconducting states controlled by orientations of
local wrinkles on the surface of LiFeAs. Using scanning tunneling
microscopy/spectroscopy, we find type-I wrinkles enlarge the superconducting
gaps and enhance the transition temperature, whereas type-II wrinkles
significantly suppress the superconducting gaps. The vortices on wrinkles show
a C2 symmetry, indicating the strain effects on the wrinkles. A discontinuous
switch of superconductivity occurs at the border between two different
wrinkles. Our results demonstrate that the local strain effect could affect
superconducting order parameter of LiFeAs with a possible Lifshitz transition,
by alternating crystal structure in different directions.

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The categories of this paper are: adap-org
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga