2D Materials,
Journal Year:
2024,
Volume and Issue:
12(2), P. 022002 - 022002
Published: Dec. 17, 2024
Abstract
Quantum
devices,
which
rely
on
quantum
mechanical
effects
for
their
operation,
may
offer
advantages,
such
as
reduced
dimensions,
increased
speed,
and
energy
efficiency,
compared
to
conventional
devices.
However,
phenomena
are
typically
observed
only
at
cryogenic
temperatures,
limits
practical
applications.
Two-dimensional
materials
van
der
Waals
(vdW)
heterostructures
provide
a
promising
platform
high-temperature
devices
owing
strong
Coulomb
interactions
and/or
spin–orbit
coupling.
In
this
review,
we
summarise
recent
research
emergent
in
vdW
based
interlayer
tunnelling
the
coupling
of
charged
particles
spins,
including
negative
differential
resistance,
Josephson
tunnelling,
exciton
condensation,
topological
superconductivity.
These
underlying
mechanisms
energy-efficient
tunnel
field-effect
transistors,
topological/superconducting
computers.
The
natural
homojunction
within
layered
offers
clean
interfaces
perfectly
aligned
structures
enhanced
Twisted
bilayers
with
small
angles
also
give
rise
novel
effects.
addition,
highlight
several
proposed
achieving
Majorana
zero
modes,
critical
elements
computing.
This
review
is
helpful
researchers
working
interface
engineering
towards
operating
above
liquid
nitrogen
temperature.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 15, 2024
Abstract
The
pronounced
exciton
binding
energy
(
E
b
)
in
covalent
organic
frameworks
(COFs)
results
significant
loss,
thereby
constraining
the
photocatalytic
efficiency
of
COFs.
Herein,
triphenylamine
is
employed
as
an
electron
donor,
while
triphenyltriazine
served
acceptor;
benzene,
naphthalene,
and
anthracene
are
utilized
π‐bridges
with
progressively
increasing
conjugation
to
synthesize
a
series
D‐π‐A
structured
COFs
photocatalysts
(COF‐1,
COF‐2,
COF‐3).
correlation
between
π‐bridge
structures
systematically
examined
through
removal
hexavalent
uranium
U(VI)
from
tailings
wastewater
under
visible
light
irradiation
model
reaction.
Notably,
increase
initially
enhanced
then
diminished
properties
these
three
catalysts.
This
phenomenon
can
be
attributed
fact
that
coplanarity
within
does
not
consistently
improve
greater
conjugations;
specifically,
COF‐2
featuring
naphthalene
exhibited
smallest
dihedral
angle.
reduced
angle
facilitated
more
planar
delocalized
transport
pathway
donor
acceptor
moieties,
leading
decreased
inhibited
recombination.
Consequently,
demonstrated
exceptional
reduction
U(VI),
achieving
efficiencies
1.8
times
1.5
than
those
COF‐1
COF‐3,
respectively.
approach
offers
novel
insights
into
mitigating
COFs‐based
photocatalysts.
APL Photonics,
Journal Year:
2025,
Volume and Issue:
10(1)
Published: Jan. 1, 2025
Recent
breakthroughs
in
high
repetition-rate
extreme
ultraviolet
(XUV)
light
sources
and
photoelectron
analyzers
have
led
to
dramatic
advances
the
performance
of
time-resolved
photoemission
experiments.
In
this
perspective
article,
we
discuss
application
cavity-enhanced
high-order
harmonic
generation,
with
repetition
rates
exceeding
10
MHz,
experiments
using
advanced
endstations
incorporating
time-of-flight
analyzers.
We
recent
results,
on
future
areas
for
further
technological
improvement,
wide
array
science
enabled
by
ultrafast
XUV
experiments,
now
a
qualitatively
new
regime.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(31), P. 9459 - 9467
Published: July 23, 2024
Heterostructures
(HSs)
formed
by
the
transition-metal
dichalcogenide
materials
have
shown
great
promise
in
next-generation
(opto)electronic
applications.
An
artificially
twisted
HS
allows
us
to
manipulate
optical
and
electronic
properties.
In
this
work,
we
introduce
understanding
of
energy
transfer
(ET)
process
governed
dipolar
interaction
a
molybdenum
diselenide
(MoSe
Advances in Physics X,
Journal Year:
2024,
Volume and Issue:
9(1)
Published: July 26, 2024
Excitons
–
two-particle
correlated
electron-hole
pairs
are
the
dominant
low-energy
optical
excitation
in
broad
class
of
semiconductor
materials,
which
range
from
classical
silicon
to
perovskites,
and
two-dimensional
organic
materials.
The
study
excitons
has
been
brought
on
a
new
level
detail
by
application
photoemission
momentum
microscopy
technique
that
dramatically
extended
capabilities
time-
angle
resolved
spectroscopy.
Here,
we
review
how
photoelectron
detection
scheme
enables
direct
access
energy
landscape
bright
dark
excitons,
and,
more
generally,
momentum-coordinate
exciton
wavefunction.
Focusing
materials
semiconductors,
first
discuss
typical
fingerprint
highlight
it
is
possible
obtain
information
not
only
electron-
but
also
hole-component.
Second,
focus
recent
orbital
tomography
such
this
provides
unique
real-space
properties
We
studies
performed
transition
metal
dichalcogenides
semiconductors
lead
very
similar
conclusions,
manner,
strength
for
excitations
semiconductors.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
In
this
short
review,
an
overview
of
recent
progress
in
deploying
advanced
characterization
techniques
is
provided
to
understand
the
effects
spatial
variation
and
inhomogeneities
moiré
heterostructures
over
multiple
length
scales.
Particular
emphasis
placed
on
correlating
impact
twist
angle
misalignment,
nano‐scale
disorder,
atomic
relaxation
potential
its
collective
excitations,
particularly
excitons.
Finally,
future
technological
applications
leveraging
excitons
are
discussed.
