882 research outputs found
A New Type of Electron Nuclear-Spin Interaction from Resistively Detected NMR in the Fractional Quantum Hall Effect Regime
Two dimensional electron gases in narrow GaAs quantum wells show huge
longitudinal resistance (HLR) values at certain fractional filling factors.
Applying an RF field with frequencies corresponding to the nuclear spin
splittings of {69}Ga, {71}Ga and {75}As leads to a substantial decreases of the
HLR establishing a novel type of resistively detected NMR. These resonances are
split into four sub lines each. Neither the number of sub lines nor the size of
the splitting can be explained by established interaction mechanisms.Comment: 4 pages, 3 figure
Variable Curvature Slab Molecular Dynamics as a Method to Determine Surface Stress
A thin plate or slab, prepared so that opposite faces have different surface
stresses, will bend as a result of the stress difference. We have developed a
classical molecular dynamics (MD) formulation where (similar in spirit to
constant-pressure MD) the curvature of the slab enters as an additional
dynamical degree of freedom. The equations of motion of the atoms have been
modified according to a variable metric, and an additional equation of motion
for the curvature is introduced. We demonstrate the method to Au surfaces, both
clean and covered with Pb adsorbates, using many-body glue potentials.
Applications to stepped surfaces, deconstruction and other surface phenomena
are under study.Comment: 16 pages, 8 figures, REVTeX, submitted to Physical Review
Method for atomic-layer-resolved measurement of polarization fields by nuclear magnetic resonance
Ponatinib in patients with refractory acute myeloid leukaemia: findings from a phase 1 study
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/99099/1/bjh12382.pd
Poaching and firm-sponsored training: first clean evidence
A series of seminal theoretical papers argues that poaching of employees may hamper company-sponsored general training. However, the extent of poaching, its determinants and consequences, remains an open empirical question. We provide a novel empirical identification strategy for poaching and investigate its causes and consequences. We find that only a small number of training firms in Germany are poaching victims. Firms are more likely to poach employees during an economic downturn. Training firms respond to poaching by lowering the share of new apprentice intakes in the following years
Long-term benefits and risks of frontline nilotinib vs imatinib for chronic myeloid leukemia in chronic phase: 5-year update of the randomized ENESTnd trial
Fine material in grain
Fine material in grain: an overview / Richard Stroshine -- Factors that affect the costs of fines in the corn export market / Lowell D. Hill, Mack Leath -- Effects of fine material on mold growth in grain / David B. Sauer, Richard A. Meronuck, John Tuite -- Effects of fine material on insect infestation: a review / Paul W. Flinn, William H. McGaughey, Wendell E. Burkholder -- Reducing or controlling damage to grain from handling: a review / Charles R. Martin, George H. Foster -- Evaluating grain for potential production of fine material - breakage susceptibility testing / Steven R. Eckhoff -- Genotypic differences in breakage susceptibility of corn and soybeans -- M. R. Paulsen, L. L. Darrah, R. L. Stroshin
Optical manipulation of nuclear spin by a two-dimensional electron gas
Conduction electrons are used to optically polarize, detect and manipulate
nuclear spin in a (110) GaAs quantum well. Using optical Larmor magnetometry,
we find that nuclear spin can be polarized along or against the applied
magnetic field, depending on field polarity and tilting of the sample with
respect to the optical pump beam. Periodic optical excitation of the
quantum-confined electron spin reveals a complete spectrum of optically-induced
and quadrupolar-split nuclear resonances, as well as evidence for delta m = 2
transitions.Comment: 13 pages, 4 figures. Submitted for publicatio
Does It Pay To Be a Woman? Labour Demand Effects of Maternity-Related Job Protection and Replacement Incomes
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