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.
Physical Review Letters,
Journal Year:
2024,
Volume and Issue:
133(21)
Published: Nov. 19, 2024
Graphene-based
van
der
Waals
heterostructures
take
advantage
of
tailoring
spin-orbit
coupling
(SOC)
in
the
graphene
layer
by
proximity
effect.
At
long
wavelength---saddled
electronic
states
near
Dirac
points---the
proximitized
features
can
be
effectively
modeled
Hamiltonian
involving
novel
SOC
terms
and
allow
for
an
admixture
tangential
radial
spin-textures---by
so-called
Rashba
angle
${\ensuremath{\theta}}_{\mathrm{R}}$.
Taking
such
effective
models
we
perform
realistic
large-scale
magnetotransport
calculations---transverse
magnetic
focusing
Dyakonov-Perel
spin
relaxation---and
show
that
there
are
unique
qualitative
quantitative
allowing
unbiased
experimental
disentanglement
conventional
from
its
counterpart,
called
here
SOC.
Along
with
that,
propose
a
scheme
direct
estimation
exploring
magneto
response
symmetries
when
swapping
in-plane
field.
To
complete
story,
analyze
spin-relaxation
signatures
presence
emergent
Dresselhaus
also
provide
some
generic
ramifications
about
possible
scenarios
superconducting
diode
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Abstract
Hybrid
heterostructures
are
pivotal
in
the
advanced
broadband
detection
technology.
The
emergence
of
2D
semimetals
has
expanded
range
materials
beyond
conventional
narrow‐gap
for
room‐temperature
applications
due
to
their
extraordinary
optical
and
electrical
properties.
This
review
outlines
cutting‐edge
latest
advancements
photodetectors
(PDs)
engineered
from
that
synergistically
combine
with
several
different
dimensional
materials.
It
begins
a
fundamental
investigation,
offering
an
in‐depth
explanation
essential
material
properties
summary
synthesis
methodologies.
Then,
discussion
advances
provide
analytical
overview
categorization,
underlying
photodetection
mechanism,
figures‐of‐merit
these
PDs.
Subsequently,
narrative
shifts
comprehensive
analysis
heterogeneous
integrated
devices.
further
highlights
diverse
optoelectronic
PDs,
spanning
image
sensing,
communication,
position‐sensitive
detection,
sensing
computing,
spintronics,
computational
spectroscopy
thoroughly
highlighted.
Finally,
concludes
by
addressing
challenges
opportunities
advancing
semimetal
photodetection.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 18, 2025
Abstract
An
important
goal
of
spintronics
research
is
to
discover
efficient
methods
for
generating
spin
currents.
Generally,
symmetry
conditions
constrain
polarization
be
orthogonal
both
the
charge
and
currents
in
nonmagnetic
metals.
However,
certain
systems
with
low
structural
may
permit
generation
different
orientations.
Here,
observation
non‐orthogonal
current
PtMnGa
thin
film
reported,
where
composition
gradient
Pt
Mn
along
normal
direction
results
mirror
breaking
about
plane.
Through
second
harmonic
Hall
(SHH)
resistance,
spin‐torque
ferromagnetic
resonance
(ST‐FMR),
spin‐orbit
torques
induced
magnetization
switching
measurements
on
PtMnGa/ferromagnets
films,
robust
s
x
,
y
z
polarizations
are
confirmed,
which
supported
by
density
functional
theory
calculations.
The
angles
i
(
=
)
calculated
using
SHH
ST‐FMR
methods,
yielding
consistent
results.
Furthermore,
a
zero‐field
partial
realized
perpendicularly
magnetized
PtMnGa/Co/Pt
multilayers
due
presence
These
demonstrate
that
can
promising
source,
providing
key
strategy
finding
new
device
functionalities.
Applied Physics Letters,
Journal Year:
2025,
Volume and Issue:
126(16)
Published: April 21, 2025
The
Rashba
effect
in
Janus
structures,
accompanied
by
nontrivial
topology,
plays
an
important
role
spintronics
and
even
photovoltaic
applications.
Herein,
through
first-principles
calculations,
we
systematically
investigate
the
geometric
stability
electronic
structures
of
135
kinds
MAA'ZxZ'(4−x)
family
derived
from
two-dimensional
MA2Z4
(M
=
Mg,
Ga,
Sr;
A
Al,
Ga;
Z
S,
Se,
Te)
monolayers
design
numerous
semiconductors
inversion-asymmetric
topological
insulators.
Specifically,
there
are
a
total
26
with
isolated
spin-splitting
bands
contributed
Se/Te-pz
orbitals
at
conduction
band
minimum,
magnitude
constant
correlates
strongly
both
intrinsic
electric
field
strength
spin–orbit
coupling
(SOC).
As
atomic
number
increases,
bandgap
continually
decreases
until
it
shrinks
to
point
where,
when
SOC
is
considered,
inversion
occurs,
leading
reopening
phases.
In
conjunction
inversion,
pz
near
Fermi
level
can
introduce
double
splitting
featuring
distinctive
hybrid
spin
texture,
which
be
further
effectively
adjusted
small
biaxial
strains
show
continuous
evolution
non-topological
different
textures.
This
work
provides
significant
insights
into
topology
physics
presents
indispensable
inversion-asymmetry
materials
for
development
nonlinear
optoelectronics.
Physical Review Letters,
Journal Year:
2025,
Volume and Issue:
134(16)
Published: April 25, 2025
We
demonstrate
that
two-dimensional
Kramers-Weyl
fermions
can
be
engineered
in
spin-orbit
coupled
twisted
bilayers,
where
the
chiral
structure
of
these
moiré
systems
breaks
all
mirror
symmetries,
confining
to
high-symmetry
points
Brillouin
zone
under
time
reversal
symmetry.
Our
theoretical
analysis
reveals
a
symmetry-enforced,
Weyl-like
spinful
interlayer
coupling
universally
ensures
an
ideal
radial
spin-texture
at
arbitrary
twist
angles,
C_{nz}
symmetry
with
n>2.
First
principles
density
functional
calculation
confirm
realization
α-In_{2}Se_{3}
homobilayers,
flat
bands
and
out-of-plane
ferroelectric
polarization
each
layer
guarantee
physics
spin
textures.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 27, 2025
Abstract
The
key
attraction
of
graphene
in
spintronics
arises
from
its
high
electronic
mobility
and
low
intrinsic
spin‐orbit
coupling
(SOC),
which
enable
long
spin
relaxation
times.
However,
the
weak
SOC
limits
ability
to
control
currents
within
graphene.
A
promising
strategy
for
enhancing
functionalities
is
introduce
proximity
effects
with
other
materials.
In
this
context,
molecular
compounds
show
great
potential
tuning
properties
Here,
a
novel
fabrication
methodology
presented
that
integrates
graphene‐based
spintronic
nanodevices
using
stencil
hexagonal
boron
nitride
(hBN)
masks,
allowing
us
investigate
resulting
spin‐related
effects.
First,
our
non‐destructive
technique,
confirmed
by
micro‐Raman
spectroscopy,
preserves
integrity
compound.
Moreover,
combining
experimental
Hanle
precession
3D
diffusion
model,
it
demonstrated
fullerene
(C
60
)
molecules
enhance
time
established
can
be
further
expanded
integrate
exotic
compounds,
such
as
photochromic
cross‐over
molecules,
enabling
exploration
proximity‐induced
phenomena
paving
way
spin‐based
multifunctional
nanodevices.
