Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The chiral anomaly and thermopower of Weyl fermions in the half-Heusler
  GdPtBi   The Dirac and Weyl semimetals are unusual materials in which the nodes of the
bulk states are protected against gap formation by crystalline symmetry. The
chiral anomaly~\cite{Adler,Bell}, predicted to occur in both systems, was
recently observed as a negative longitudinal magnetoresistance (LMR) in
Na$_3$Bi and in TaAs. An important issue is whether Weyl physics appears in a
broader class of materials. We report evidence for the chiral anomaly in the
half-Heusler GdPtBi. In zero field, GdPtBi is a zero-gap semiconductor with
quadratic bands. In a magnetic field, the Zeeman energy leads to Weyl nodes. We
have observed a large negative LMR with the field-steering properties specific
to the chiral anomaly. The chiral anomaly also induces strong suppression of
the thermopower. We report a detailed study of the thermoelectric response
function $\alpha_{xx}$ of Weyl fermions. The scheme of creating Weyl nodes from
quadratic bands suggests that the chiral anomaly may be observable in a broad
class of semimetals.

30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol