Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kondo-lattice theory of anisotropic singlet superconductivity   Kondo-lattice theory for the t-J model and a phenomenological theory based on
it are developed to study superconductivity in the vicinity of the Mott
metal-insulator transition. Since the quenching of magnetic moments by
single-site quantum spin fluctuations or the Kondo effect is reduced by the
opening of a superconducting gap, spin density wave (SDW) can appear in a
superconducting state and the Knight shift can deviate from the Yosida function
to be small. The electron-phonon interaction, which arises from the modulation
of the superexchange interaction by phonons, is crucial in the coexistence of
superconductivity and SDW. It is proposed that the coexistence of
superconductivity, a double-Q SDW, a double-Q lattice distortion, and a
double-Q charge density wave induced by the SDW rather than the lattice
distortion, is responsible for the checkerboard structure and the
zero-temperature pseudo-gap observed in under-doped cuprate superconductors.

24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph