Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-dimensional charge order stabilized in clean polytype
  heterostructures   Compelling evidence suggests distinct correlated electron behavior may exist
only in clean 2D materials such as 1T-TaS2. Unfortunately, experiment and
theory suggest that extrinsic disorder in free standing 2D layers disrupts
correlation-driven quantum behavior. Here we demonstrate a route to realizing
fragile 2D quantum states through endotaxial polytype engineering of van der
Waals materials. The true isolation of 2D charge density waves (CDWs) between
metallic layers stabilizes commensurate long-range order and lifts the coupling
between neighboring CDW layers to restore mirror symmetries via interlayer CDW
twinning. The twinned-commensurate charge density wave (tC-CDW) reported herein
has a single metal--insulator phase transition at ~350 K as measured
structurally and electronically. Fast in-situ transmission electron microscopy
and scanned nanobeam diffraction map the formation of tC-CDWs. This work
introduces endotaxial polytype engineering of van der Waals materials to access
latent 2D ground states distinct from conventional 2D fabrication.

23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
2
The categories of this paper are: math