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Now showing items 791-800 of 2111
Spin polaron effective magnetic model for La0.5Ca0.5MnO3
(2004)
The conventional paradigm of charge order for La1−xCaxMnO3 for x=0.5 has been challenged recently by a Zener polaron picture emerging from experiments and theoretical calculations. The effective low energy Hamiltonian for ...
Surface Studies of Oxidised Metals: Mo, Nb and Cu
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
The atomic structure and evolution of ultra-thin film oxides is investigated for Mo, Nb and Cu using surface sensitive techniques such as scanning tunneling microscopy (STM), scanning tunneling spectroscopy (STS), low ...
Liquid exfoliation of defect-free graphene
(2013)
Due to its unprecedented physical properties, graphene has generated huge interest over the last 7 years. Graphene is generally fabricated in one of two ways: as very high quality sheets produced in limited quantities by ...
The energy of fcc and hcp foams
(2020)
We present Surface Evolver evaluations of the difference in energy between face-centred cubic (fcc) and hexagonal close-packed (hcp) foams in the usual idealized model, for liquid fractions ranging from the dry to the wet ...
Micromechanical mass sensors for biomolecular detection in a physiological environment
(2005)
Micromechanical cantilever arrays are used to measure time-resolved adsorption of tiny masses based on
protein-ligand interactions. Here, streptavidin-biotin interactions are investigated in a physiological environment.
A ...
Electrodeposition of coercive ferromagnetic films
(Trinity College (Dublin, Ireland). School of Physics, 2005)
The need for even more compact and low power consumption devices has been the
driving force for microeiectromechanical systems (MEMS). Also the integration of
MEMS into current state of the art silicon technology has set ...
MoO3 nanoparticles dispersed uniformly in carbon matrix: a high capacity composite anode for Li-ion batteries
(2011)
A MoO3?carbon nanocomposite was synthesized from a mixture of MoO3 and graphite by a controlled ball milling procedure. The as-prepared product consists of nanosized MoO3 particles (2?180 nm) homogeneously distributed in ...
Observation of nonradiative energy transfer in the excitation of Nd3+ in GaP
(American Physical Society, 1990)
We have carried out luminescence-excitation measurements on a Nd3+ complex in GaP in the range 1.5?2.2 eV to determine the mechanisms by which the internal Nd3+ luminescence is generated. At low temperatures we observe ...
Effect of Coulomb enhancement on optical gain in (Zn,Cd)Se/ZnSe multiple quantum wells
(American Physical Society, 1997)
The optical-gain spectra of a 40-? (Zn,Cd)Se/ZnSe multiple quantum well has been measured at various temperatures using a variable-stripe method. By comparison with a gain calculation including many-body effects, we have ...
Optimization techniques in elastic proton-proton collisions
(Trinity College (Dublin, Ireland). School of Physics, 2000)
The proton spin puzzle has intrigued experimentalists and theorists since
the surprising result from the EMC experiment at CERN in 1988, which found a smaller than expected contribution to the spin of the proton from the ...