13,666 research outputs found
Probing of valley polarization in graphene via optical second-harmonic generation
Valley polarization in graphene breaks inversion symmetry and therefore leads
to second-harmonic generation. We present a complete theory of this effect
within a single-particle approximation. It is shown that this may be a
sensitive tool to measure the valley polarization created, e.g., by polarized
light and, thus, can be used for a development of ultrafast valleytronics in
graphene.Comment: 5 pages, 3 figure
A HIERARCHICAL BAYES APPROACH TO MODELING CHOICE DATA: A STUDY OF WETLAND RESTORATION PROGRAMS
This study examines the factors the influence the values and importance that landowners place on the attributes of voluntary wetland restoration programs. Choice-based conjoint analysis, a stated preference method, was used to estimate the marginal utilities and values for restoration program attributes for North Carolina landowners. Landowner preferences were estimated at individual and aggregate levels to examine the importance of modeling heterogeneous preferences. Choice modeling performed at both aggregate and individual levels demonstrated the information gains from a disaggregated approach.Research Methods/ Statistical Methods,
- …