Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of spin-orbit coupling and evolution of the electronic structure of
  WTe$_2$ under an external magnetic field   Here, we present a detailed study on the temperature and angular dependence
of the Shubnikov-de-Haas (SdH) effect in the semi-metal WTe$_2$. This compound
was recently shown to display a very large non-saturating magnetoresistance
which was attributed to nearly perfectly compensated densities of electrons and
holes. We observe four fundamental SdH frequencies and attribute them to
spin-orbit split, electron- and hole-like, Fermi surface (FS) cross-sectional
areas. Their angular dependence seems consistent with ellipsoidal FSs with
volumes suggesting a modest excess in the density of electrons with respect to
that of the holes. We show that density functional theory (DFT) calculations
fail to correctly describe the FSs of WTe$_2$. When their cross-sectional areas
are adjusted to reflect the experimental data, the resulting volumes of the
electron/hole FSs obtained from the DFT calculations would imply a pronounced
imbalance between the densities of electrons and holes. We find evidence for
field-dependent Fermi surface cross-sectional areas by fitting the oscillatory
component superimposed onto the magnetoresistivity signal to several
Lifshitz-Kosevich components. We also observe a pronounced field-induced
renormalization of the effective masses. Taken together, our observations
suggest that the electronic structure of WTe$_2$ evolves with the magnetic
field. This evolution might be a factor contributing to its pronounced
magnetoresistivity.

5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics