In
this
work,
we
propose
an
electronic
L\'evy
glass
built
from
graphene
nanoribbons
in
the
presence
of
regions
with
enhanced
spin-orbit
coupling.
Although
electrons
present
a
low
coupling
strength,
it
can
be
increased
by
proximity
effect
appropriate
substrate.
We
consider
different
edge
types,
which
contain
circular
tunable
Rashba
coupling,
whose
diameter
follows
power-law
distribution.
find
that
spin-orbital
clusters
induce
transition
superdiffusive
to
diffusive
charge
transport,
similar
what
recently
reported
for
electrostatic
[Phys.
Rev.
B
107,
155432
(2023)].
also
investigate
spin
polarization
glasses,
and
show
finite
found
only
regime.
contrast,
vanishes
regime,
making
useful
device
transmission
controlled
its
Fermi
energy.
Finally,
apply
multifractal
analysis
polarization,
time
series
regime
are
multifractal,
while
they
tend
monofractal
both
regimes,
characterizing
marked
difference
between
mesoscopic
fluctuations
transport
proposed
glass.
Exploring
spin-valley
coupling
in
two-dimensional
(2D)
materials
with
strong
spin-orbit
(SOC)
is
of
great
significance
for
fundamental
physics
and
practical
applications.
Using
first-principles
calculations,
we
investigate
the
valley-related
properties
Janus
$XM{\mathrm{SiN}}_{2}$
$(X=\mathrm{S},
\mathrm{Se};
M=\mathrm{Mo},
\mathrm{Cr})$
monolayer.
The
monolayer
forms
a
pair
nonequivalent
valleys,
conduction
valence
bands
are
degenerated
at
valleys.
inversion
symmetry
breaking
SOC
effect
induce
remarkable
valley
spin
splitting
Rashba
splitting.
Our
calculations
indicate
that
not
only
valley-contrasting
transport
but
also
optical
selection
rules
result
coexistence
Hall
effects
Moreover,
demonstrate
valley-spin
can
be
modulated
by
in-plane
biaxial
strains,
allowing
its
extraordinary
potential
spintronics
valleytronic
We
show
V-doped
${\mathrm{SMoSiN}}_{2}$
exhibit
giant
polarization
89.51
meV
$(\ensuremath{-}24.48
\mathrm{meV})$
(conduction)
band.
These
findings
could
helpful
applications
npj Spintronics,
Journal Year:
2024,
Volume and Issue:
2(1)
Published: June 28, 2024
Abstract
One
of
the
ultimate
goals
spintronics
is
to
realize
an
efficient
electrical
manipulation
spin
for
high-speed
and
low-power
nanodevices.
A
core
ingredient
achieving
this
goal
relativistic
interaction
between
electron’s
orbital
motion
spin,
but
properties
angular
momentum
itself
have
remained
largely
unexplored.
However,
recent
theories
experiments
uncovered
that
electrons
may
acquire
nonvanishing
when
external
electric
field
applied,
even
without
spin–orbit
coupling.
These
findings
spurred
emergence
a
burgeoning
known
as
orbitronics,
which
harnesses
manipulate
magnetic
devices.
In
Review,
we
provide
overview
developments
in
orbitronics
discuss
their
implications
spintronics.
We
then
outline
future
avenues
research
at
intersection
orbitronics.
Nonlinear
responses
in
transport
experiments
may
unveil
information
and
generate
new
phenomena
materials
that
are
not
accessible
at
linear
order
due
to
symmetry
constraints.
While
the
anomalous
Hall
response
strictly
requires
absence
of
time-reversal
symmetry,
second-order,
thus
nonlinear,
needs
broken
inversion
symmetry.
Recently,
much
effort
has
been
made
obtain
a
second-order
voltage
longitudinal
ac
driving
current,
both
about
band
geometric
quantities
for
its
useful
technological
applications,
including
rectification
frequency
doubling.
Typically,
additional
material
engineering
is
required
noncentrosymmetric
systems
since
it
obeys
stringent
crystallographic
constraint.
To
circumvent
this,
an
alternative
route
apply
dc
electric
field.
In
this
Letter,
we
uncover
field
induced
effect
inversion-broken
possessing
experimentally
unconventional
Rashba
bands.
We
establish
quantum
metric,
geometrical
feature
electronic
wave
functions
providing
on
nontrivial
structure
Bloch
bands,
responsible
nonlinear
response.
Published
by
American
Physical
Society
2025
The
Rashba
effect
is
quintessential
in
condensed
matter
physics,
appearing
virtually
any
electronic
heterostructure.
Its
well-known
manifestation
a
tangential
spin
texture.
Here,
the
authors
theoretically
demonstrate
emergence
and
engineering
of
radial
textures
twisted
van
der
Waals
heterostructures
using
rigorous
first-principles
simulations
phenomenological
modeling.
These
predictions
offer
new
opportunities
for
controlling
manipulation,
as
well
tuning
correlated
states
superconductivity
realm.
npj Spintronics,
Journal Year:
2025,
Volume and Issue:
3(1)
Published: Jan. 27, 2025
The
interplay
of
electronic
charge,
spin,
and
orbital
currents,
coherently
driven
by
picosecond
long
oscillations
light
fields
in
spin-orbit
coupled
systems,
is
the
foundation
emerging
terahertz
lightwave
spintronics
orbitronics.
essential
rules
for
how
interact
with
these
systems
a
nonlinear
way
are
still
not
understood.
In
this
work,
we
demonstrate
universally
applicable
nonlinearity
originating
from
interactions
conducting
materials,
wherein
light-induced
spin
textures
manifests.
We
utilized
harmonic
generation
spectroscopy
to
investigate
dynamics
over
timescales
various
transition
metal
films.
found
that
efficiency
scales
Hall
conductivity
studied
films,
while
phase
takes
two
possible
values
(shifted
π),
depending
on
d-shell
filling.
These
findings
elucidate
fundamental
mechanisms
governing
non-equilibrium
polarization
at
frequencies,
which
relevant
potential
applications
spin-
orbital-based
devices.
Physical Review Letters,
Journal Year:
2025,
Volume and Issue:
134(7)
Published: Feb. 19, 2025
In
ferroelectric
(FE)
semiconductors
with
strong
spin-orbit
coupling,
the
electron's
spin
direction
is
locked
to
its
momentum
by
an
intrinsic
field
(SOF)
switchable
polarization.
This
provides
a
promising
platform
for
novel
nonvolatile
spintronic
devices.
Here,
we
propose
exploiting
SOF
realize
FE
valve
(FE-SOV),
where
two
are
separated
thin
barrier
layer.
Because
of
locking
between
and
polarization
direction,
conductance
FE-SOV
strongly
depends
on
relative
orientation
semiconductors.
Using
tight-binding
model
density
functional
theory
calculations
FE-SOVs
based
two-dimensional
SnTe
Bi,
demonstrate
giant
effect
that
characterized
change
several
orders
in
magnitude.
Our
work
enriches
physics
ferroelectrics
proposes
new
type
all-electric
control
spin-orbitronic
device,
which
holds
promise
future
electronic
memory
applications.
