Physical Review Research,
Journal Year:
2025,
Volume and Issue:
7(2)
Published: April 3, 2025
Oxygen-deficient
titanium
dioxide
(TiO2−x)
is
a
very
attractive
material
for
several
applications
ranging
from
photocatalysis
to
resistive
switching.
Oxygen
vacancies
turn
insulating
anatase
into
polaronic
conductor,
while
creating
defect-state
band
below
the
ultraviolet
semiconducting
gap.
Here
we
employ
combination
of
broadband
infrared
(IR)
reflectivity
and
THz-pump/IR-probe
measurements
investigate
relationship
between
localized
defect
states
delocalized
conducting
states.
We
show
that
THz
pump
allows
convert
deeply
electrons
metastable
polarons
with
lifetime
in
ns
range.
These
long-lived
may
find
application
novel
optoelectronic
exploiting
interplay
dc
resistivity,
terahertz
signals.
Published
by
American
Physical
Society
2025
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Ferroelectric
tunnel
junctions
(FTJs)
harness
the
combination
of
ferroelectricity
and
quantum
tunneling
thus
herald
opportunities
in
next-generation
nonvolatile
memory
technologies.
Recent
advancements
fabrication
ultrathin
heterostructures
have
enabled
integration
ferroelectrics
with
various
functional
materials,
forming
hybrid
tunneling-diode
junctions.
These
benefit
from
modulation
layer/ferroelectric
interface
through
ferroelectric
polarization,
enabling
further
modalities
capabilities
addition
to
electroresistance.
This
Perspective
aims
provide
in-depth
insight
into
physical
phenomena
several
typical
junctions,
ranging
ferroelectric/dielectric,
ferroelectric/multiferroic,
ferroelectric/superconducting
ferroelectric/2D
finally
their
expansion
realm
resonant
diodes
(FeRTDs).
latter
aspect,
i.e.,
tunneling,
offers
an
approach
exploiting
behavior
heterostructures.
We
discuss
examples
that
successfully
shown
room-temperature
control
parameters
such
as
peak,
current
ratio
at
negative
differential
resistance.
conclude
by
summarizing
challenges
highlighting
for
future
development
FTJs,
a
special
emphasis
on
possible
type
FeRTD
device.
The
prospects
enhanced
performance
expanded
functionality
ignite
tremendous
excitement
FTJs
FeRTDs
nanoelectronics.
Advanced Intelligent Systems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 14, 2025
Neuromorphic
computing
has
the
potential
to
revolutionize
future
technologies
and
our
understanding
of
intelligence,
yet
it
remains
challenging
realize
in
practice.
The
learning‐from‐mistakes
algorithm,
inspired
by
brain's
simple
learning
rules
inhibition
pruning,
is
one
few
brain‐like
training
methods.
This
algorithm
implemented
neuromorphic
memristive
hardware
through
a
codesign
process
that
evaluates
essential
trade‐offs.
While
effectively
trains
small
networks
as
binary
classifiers
perceptrons,
performance
declines
significantly
with
increasing
network
size
unless
tailored
algorithm.
work
investigates
trade‐offs
between
depth,
controllability,
capacity—the
number
learnable
patterns—in
hardware.
highlights
importance
topology
governing
equations,
providing
theoretical
tools
evaluate
device's
computational
capacity
based
on
its
measurements
circuit
structure.
findings
show
breaking
neural
symmetry
enhances
both
controllability
capacity.
Additionally,
pruning
circuit,
algorithms
all‐memristive
circuits
can
utilize
stochastic
resources
create
local
contrasts
weights.
Through
combined
experimental
simulation
efforts,
parameters
are
identified
enable
exhibit
emergent
intelligence
from
rules,
advancing
computing.
Physical Review Research,
Journal Year:
2025,
Volume and Issue:
7(2)
Published: April 3, 2025
Oxygen-deficient
titanium
dioxide
(TiO2−x)
is
a
very
attractive
material
for
several
applications
ranging
from
photocatalysis
to
resistive
switching.
Oxygen
vacancies
turn
insulating
anatase
into
polaronic
conductor,
while
creating
defect-state
band
below
the
ultraviolet
semiconducting
gap.
Here
we
employ
combination
of
broadband
infrared
(IR)
reflectivity
and
THz-pump/IR-probe
measurements
investigate
relationship
between
localized
defect
states
delocalized
conducting
states.
We
show
that
THz
pump
allows
convert
deeply
electrons
metastable
polarons
with
lifetime
in
ns
range.
These
long-lived
may
find
application
novel
optoelectronic
exploiting
interplay
dc
resistivity,
terahertz
signals.
Published
by
American
Physical
Society
2025
