Kavli Affiliate: Michael F. Crommie
| First 5 Authors: , , , ,
| Summary:
Tomonaga-Luttinger liquid (TLL) behavior in one-dimensional systems has been
predicted and shown to occur at semiconductor-to-metal transitions within
two-dimensional materials. Reports of one-dimensional defects hosting a Fermi
liquid or a TLL have suggested a dependence on the underlying substrate,
however, unveiling the physical details of electronic contributions from the
substrate require cross-correlative investigation. Here, we study TLL formation
within defectively engineered WS$_2$ atop graphene, where band structure and
the atomic environment is visualized with nano angle-resolved photoelectron
spectroscopy, scanning tunneling microscopy and spectroscopy, and non-contact
atomic force microscopy. Correlations between the local density of states and
electronic band dispersion elucidated the electron transfer from graphene into
a TLL hosted by one-dimensional metal (1DM) defects. It appears that the
vertical heterostructure with graphene and the induced charge transfer from
graphene into the 1DM is critical for the formation of a TLL.
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