Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological Semimetal Nanostructures: From Properties to Topotronics   Characterized by bulk Dirac or Weyl cones and surface Fermi-arc states,
topological semimetals have sparked enormous research interest in recent years.
The nanostructures, with large surface-to-volume ratio and easy field-effect
gating, provide ideal platforms to detect and manipulate the topological
quantum states. Exotic physical properties originating from these topological
states endow topological semimetals attractive for future topological
electronics (topotronics). For example, the linear energy dispersion relation
is promising for broadband infrared photodetectors, the spin-momentum locking
nature of topological surface states is valuable for spintronics, and the
topological superconductivity is highly desirable for fault-tolerant qubits.
For real-life applications, topological semimetals in the form of
nanostructures are necessary in terms of convenient fabrication and
integration. Here, we review the recent progresses in topological semimetal
nanostructures and start with the quantum transport properties. Then
topological semimetal-based electronic devices are introduced. Finally, we
discuss several important aspects that should receive great effort in the
future, including controllable synthesis, manipulation of quantum states,
topological field effect transistors, spintronic applications, and topological
quantum computation.

15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an