Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbital-selective Mass Enhancements in Multi-band
  Ca$_{2-x}$Sr$_{x}$RuO$_{4}$ Systems Analyzed by the Extended Drude Model   We investigated optical spectra of quasi-two-dimensional multi-band Ca$%
_{2-x} $Sr$_{x}$RuO$_{4}$ systems. The extended Drude model analysis on the
ab-plane optical conductivity spectra indicates that the effective mass should
be enhanced near $x=0.5$. Based on the sum rule argument, we showed that the
orbital-selective Mott-gap opening for the $d_{yz/zx}$ bands, the widely
investigated picture, could not be the origin of the mass enhancement. We
exploited the multi-band effects in the extended Drude model analysis, and
demonstrated that the intriguing heavy mass state near $x=0.5$ should come from
the renormalization of the $d_{xy}$ band.

18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an