9 research outputs found
One- and two-magnon excitations in the antiferromagnet PbFeBO4
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234203.pdf (Publisher’s version ) (Open Access
High-Field Raman Scattering in an Antiferromagnet Fe3BO6
The detailed Raman scattering investigation of the lattice and spin dynamics of a single crystal of the Fe3BO6 antiferromagnet is reported. Azimuthally resolved polarization measurements provided an unambiguous determination of the symmetry of observed excitations. Low-temperature experiments at T=4.2 K allowed us to reduce anharmonic contribution and deconvolute several overlapping phonon modes. Low-frequency measurements have made it possible to find two excitations at 13.1 and 16.6 cm−1, which were assigned to quasi-ferromagnetic and quasi-antiferromagnetic magnon excitations, respectively. The magnetic field applied along the hard-magnetization axis causes energy shifts of these excitations, but no spin-flip transition was observed up to B=30 T
Subterahertz and terahertz spin and lattice dynamics of the insulating ferromagnet PbMnBO4
Strain-Induced Exciton Hybridization in WS2 Monolayers Unveiled by Zeeman-Splitting Measurements
Polarized emission of CdSe nanocrystals in magnetic field: the role of phonon-assisted recombination of the dark exciton
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230493.pdf (publisher's version ) (Open Access
Thermally populated versus field-induced triplon bound states in the Shastry-Sutherland lattice SrCu2(BO3)(2)
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242562.pdf (Publisher’s version ) (Open Access
Strain-Induced Exciton Hybridization in WS2 Monolayers Unveiled by Zeeman-Splitting Measurements
Strain-Induced Exciton Hybridization in WSâ‚‚ Monolayers Unveiled by Zeeman-Splitting Measurements
Mechanical deformations and ensuing strain are routinely exploited to tune the band gap energy and to enhance the functionalities of two-dimensional crystals. In this Letter, we show that strain leads also to a strong modification of the exciton magnetic moment in WS2 monolayers. Zeeman-splitting measurements under magnetic fields up to 28.5 T were performed on single, one-layer-thick WS2 microbubbles. The strain of the bubbles causes a hybridization of k-space direct and indirect excitons resulting in a sizable decrease in the modulus of the g factor of the ground-state exciton. These findings indicate that strain may have major effects on the way the valley number of excitons can be used to process binary information in two-dimensional crystals