We present a detection of 21 cm emission from largescale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment. Radio observations acquired over 102 nights are used to construct maps that are foreground filtered and stacked on the angular and spectral locations of luminous red galaxies (LRGs), emissionline galaxies (ELGs), and quasars (QSOs) from the eBOSS clustering catalogs. We find decisive evidence for a detection when stacking on all three tracers of LSS, with the logarithm of the Bayes factor equal to 18.9 (LRG), 10.8 (ELG), and 56.3 (QSO). An alternative frequentist interpretation, based on the likelihood ratio test, yields a detection significance of 7.1
The valley Zeeman physics of excitons in monolayer transition metal dichalcogenides provides valuable insight into the spin and orbital degrees of freedom inherent to these materials. Being atomicallythin materials, these degrees of freedom can be influenced by the presence of adjacent layers, due to proximity interactions that arise from wave function overlap across the 2D interface. Here, we report 60 T magnetoreflection spectroscopy of the A and B excitons in monolayer WS_{2}, systematically encapsulated in monolayer graphene. While the observed variations of the valley Zeeman effect for the A exciton are qualitatively in accord with expectations from the bandgap reduction and modification of the exciton binding energy due to the grapheneinduced dielectric screening, the valley Zeeman effect for the B exciton behaves markedly different. We investigate prototypical WS_{2}/graphene stacks employing firstprinciples calculations and find that the lower conduction band of WS_{2}at the
 Publication Date:
 NSFPAR ID:
 10416137
 Journal Name:
 2D Materials
 Volume:
 10
 Issue:
 3
 Page Range or eLocationID:
 Article No. 034002
 ISSN:
 20531583
 Publisher:
 IOP Publishing
 Sponsoring Org:
 National Science Foundation
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