Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dramatic effective mass reduction driven by strong electronic
  correlations   We present angle-resolved photoemission experiments on 1T-TiSe2 at
temperatures ranging from 13K to 288K. The data evidence a dramatic
renormalization of the conduction band below 100K, whose origin can be
explained with the exciton condensate phase model. The renormalization
translates into a substantial effective mass reduction of the dominant charge
carriers and can be directly related to the low temperature downturn of the
resistivity of 1T-TiSe2. This observation is in opposition to the common belief
that strong interactions produce heavier quasiparticles through an increased
effective mass.

31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con