C. H. Du

Near band edge anisotropic optical transitions in wide band gap semiconductor Cu2ZnSiS4

In this study, anisotropic near band edge transitions of Cu2ZnSiS4 single crystals grown by chemical vapor transport were characterized by using polarization-dependent absorption, piezoreflectance (PzR) and surface photovoltage (SPV) spectroscopy techniques at room temperature. The measurements were carried out on the as grown basal plane with the normal along [2 1 0] and the axis c parallel to the long edge of the crystal platelet. Analysis of absorption and SPV spectra reveal indirect allowed transitions for the absorption edge of Cu2ZnSiS4. The estimated values of indirect band gap are 2.97 eV and 3.07 eV, respectively, for E⊥c and E∥c polarization configurations. The polarization-dependent PzR and SPV spectra in the vicinity of the direct band gap of Cu2ZnSiS4 reveal features E⊥ex and E∥ex at around 3.32 eV and 3.41 eV for E⊥c and E∥c polarizations, respectively. Both features E⊥ex and E∥ex are associated with the interband excitonic transitions at point Γ and can be explained by crystal-field splitti...

Determination of magnetic order of the rare-earth ions in multiferroic Tbmn2O5

We have employed resonant x-ray magnetic scattering to specifically probe the magnetic order of the rare-earth ions in multiferroic

Enhancement of Si-O hybridization in low-temperature grown ultraviolet photo-oxidized SiO2 film observed by x-ray absorption and photoemission spectroscopy

{\text{TbMn}}_{2}{\text{O}}_{5}

The electronic and magnetic properties of La0.85Zr0.15MnO3 deposited on SrTiO3 and MgO substrates

. Two energy resonances were observed, one originated from the E1-E1 dipolar transition and the other from the E2-E2 quadrupolar transition. These resonances directly probe the valence

Electronic and atomic structures of the Sr 3 Ir 4 Sn 13 single crystal: A possible charge density wave material

5d

Anisotropy in the thermal hysteresis of resistivity and charge density wave nature of single crystal SrFeO 3-δ : X-ray absorption and photoemission studies

band and the partially occupied

Charge and spin coupling in magnetoresistive oxygen-vacancy strontium ferrate SrFeO3–δ

4f

Anisotropy in the magnetic interaction and lattice-orbital coupling of single crystal Ni 3 TeO 6

band, respectively. First, full polarization analysis, which is a measurement of the scattered polarization as a function of incident polarization, confirmed a spin polarization of the terbium valence states (probed by the E1-E1 transition) by the

Elucidation of the helical spin structure of FeAs

{\text{Mn}}^{4+}

Study of the phase transition and charge ordering in single-crystalline Nd1/2Sr1/2MnO3 using x-ray scattering

spin density in the commensurate phase. Second, full polarization analysis data were collected in the low-temperature incommensurate and commensurate phases when tuned to the E2-E2 resonance. By employing a least-squares fitting procedure, the spin orientations of the terbium ion sublattice were refined.