Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of spin-orbit interaction and electron correlations in strontium
  titanate   We show that the bottom of the conduction band in SrTiO3 is formed by the
Kramers doublet of states involving a superposition of all three t2g orbitals
of Ti mixed by the spin-orbit interaction. Analysis of electron correlations
based on the Hubbard model shows that Bloch states derived from this doublet
are unstable with respect to the formation of pseudo-spin singlet ground state.
These findings may be relevant to both superconductivity and high electron
mobility in SrTiO3 heterostructures.

16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess