Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A different NMR view of cuprate superconductors   Nuclear magnetic resonance (NMR) is a powerful quantum probe, but the early
conclusions on the physics of the cuprates, based on a limited set of data,
have to be revised in view of recent findings and results from extensive
literature analyses of most NMR data. These show two coupled electronic spin
components that influence the nuclei, most easily seen with the planar Cu shift
anisotropy. One component is spin from the recently identified ubiquitous
metallic excitations, the other due to the intrinsic, antiferromagnetically
coupled electronic Cu spin. Both components and its intricate interaction leave
their imprint on nuclear shifts and relaxation. They also show a family
dependence seen in the charge sharing between planar Cu and O. The main
phenomena of the doping and temperature dependences of the interplay between
both spins components are discussed in terms of an apparent phenomenology that
awaits explanation from theory.

17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex