Physical Review Materials,
Год журнала:
2025,
Номер
9(1)
Опубликована: Янв. 14, 2025
The
relaxation
of
atomic
positions
to
their
optimal
structural
arrangement
is
crucial
for
understanding
the
emergence
new
physical
behavior
in
long
scale
superstructures
twisted
bilayers
two-dimensional
materials.
amount
deviation
from
a
rigid
moiré
structure
will
depend
on
elastic
properties
constituent
monolayers
which,
bilayer,
more
flexible
are,
lower
energy
required
deform
layers
maximize
areas
with
an
energetically
interlayer
atoms.
We
investigate
this
reconstruction
highly
InSe.
Results
using
two
methods
are
demonstrated:
first
we
train
machine-learned
interatomic
potential
(MLIP)
enable
fully
atomistic
relaxations
small-twist-angle
large-length-scale
supercells
while
retaining
density
functional
theory
(DFT)
level
accuracy.
find
substantial
out-of-plane
corrugation
and
in-plane
domain
formation
wide
range
twist
angles
length
scales.
then
adapt
existing
continuum
approach
show
that
it
can
reproduce
some,
but
not
all,
features
calculations.
Published
by
American
Physical
Society
2025
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Фев. 17, 2025
The
observation
of
a
superconducting
phase,
an
intertwined
insulating
and
continuous
transition
between
the
two
at
commensurate
filling
ν
=
1
in
bilayers
twisted
WSe2
θ
3.650
raises
number
intriguing
questions
about
origin
this
phenomenology.
Here
we
report
possibility
displacement-field
induced
superconductor
quantum
spin-liquid
Mott
insulator
1,
starting
with
simplified
three-orbital
model
WSe2,
including
on-site,
nearest-neighbor
density-density
interactions,
chiral-exchange
interaction,
respectively.
By
employing
parton
mean-field
theory,
discuss
nature
these
correlated
insulators,
their
expected
evolution
displacement-field,
phenomenological
properties.
Recently,
superconductivity
phase
band-filling
was
discovered
bilayer
WSe2.
Here,
authors
theoretically
propose
that
observed
state
may
be
electron
fractionalization,
separated
from
via
transition.
Physical Review Research,
Год журнала:
2025,
Номер
7(2)
Опубликована: Апрель 24, 2025
Motivated
by
a
recent
experiment
reporting
the
fractional
quantum
spin
Hall
effect
in
twisted
MoTe2,
we
investigate
microscopically
prospects
of
realizing
exotic
topologically
ordered
states
beyond
conventional
physics.
We
show
that
insulator,
state
two
copies
non-Abelian
Moore-Read
state,
can
be
stabilized
at
half
filling
time-reversal
conjugate
Chern
bands.
elucidate
existence
this
phase
relies
on
reduction
opposite-spin
interactions
short
distances
to
overcome
Ising
ferromagnetism.
Moreover,
demonstrate
band
mixing
provides
generic
mechanism
for
achieved.
Quite
remarkably,
find
renormalization
as
small
15%
moiré
period
is
sufficient
transition
completely
spin-unpolarized
which
supports
insulator.
Furthermore,
insulator
either
break
symmetry
or
preserve
it
depending
underlying
topological
order.
Published
American
Physical
Society
2025
Physical Review Letters,
Год журнала:
2024,
Номер
133(6)
Опубликована: Авг. 7, 2024
We
predict
the
emergence
of
a
state
matter
with
intertwined
ferromagnetism,
charge
order,
and
topology
in
fractionally
filled
moiré
superlattice
bands.
Remarkably,
these
exhibit
quantized
integer
Hall
conductance
that
is
different
than
expected
from
filling
Chern
number
band.
Microscopic
calculations
show
this
phase
robustly
favored
at
half-filling
(ν=1/2)
larger
twist
angles
twisted
semiconductor
bilayer
tMoTe2.
Published
by
American
Physical
Society
2024
