NANOlab Center of Excellence literature database -- Query Results

“Biaxial strain tuning of exciton energy and polarization in monolayer WS2”. Kourmoulakis G, Michail A, Paradisanos I, Marie X, Glazov MM, Jorissen B, Covaci L, Stratakis E, Papagelis K, Parthenios J, Kioseoglou G, Applied Physics Letters 123 (2023). http://doi.org/10.1063/5.0167724 Abstract: We perform micro-photoluminescence and Raman experiments to examine the impact of biaxial tensile strain on the optical properties of WS2 monolayers. A strong shift on the order of −130 meV per % of strain is observed in the neutral exciton emission at room temperature. Under near-resonant excitation, we measure a monotonic decrease in the circular polarization degree under the applied strain. We experimentally separate the effect of the strain-induced energy detuning and evaluate the pure effect coming from the biaxial strain. The analysis shows that the suppression of the circular polarization degree under the biaxial strain is related to an interplay of energy and polarization relaxation channels as well as to variations in the exciton oscillator strength affecting the long-range exchange interaction. Keywords: A1 Journal Article; Condensed Matter Theory (CMT) ; Impact Factor: 4 DOI: 10.1063/5.0167724 Additional Links: UA library record; WoS full record show.php?record=8991
“Spin-current generation from Coulomb-Rashba interaction in semiconductor bilayers”. Glazov MM, Semina MA, Badalyan SM, Vignale G, Physical review : B : condensed matter and materials physics 84, 033305 (2011). http://doi.org/10.1103/PhysRevB.84.033305 Abstract: Electrons in double-layer semiconductor heterostructures experience a special type of spin-orbit interaction that arises in each layer from the perpendicular component of the Coulomb electric field created by electron-density fluctuations in the other layer. We show that this interaction, acting in combination with the usual spin-orbit interaction, can generate a spin current in one layer when a charge current is driven in the other. This effect is distinct symmetrywise from the spin-Hall drag. The spin current is not, in general, perpendicular to the drive current. Keywords: A1 Journal article; Condensed Matter Theory (CMT) Impact Factor: 3.836 Times cited: 5 DOI: 10.1103/PhysRevB.84.033305 Additional Links: UA library record; WoS full record; WoS citing articles show.php?record=3081

Abstract: We perform micro-photoluminescence and Raman experiments to examine the impact of biaxial tensile strain on the optical properties of WS2 monolayers. A strong shift on the order of −130 meV per % of strain is observed in the neutral exciton emission at room temperature. Under near-resonant excitation, we measure a monotonic decrease in the circular polarization degree under the applied strain. We experimentally separate the effect of the strain-induced energy detuning and evaluate the pure effect coming from the biaxial strain. The analysis shows that the suppression of the circular polarization degree under the biaxial strain is related to an interplay of energy and polarization relaxation channels as well as to variations in the exciton oscillator strength affecting the long-range exchange interaction.

Keywords: A1 Journal Article; Condensed Matter Theory (CMT) ;

Impact Factor: 4

DOI: 10.1063/5.0167724

Additional Links: UA library record; WoS full record

show.php?record=8991

Abstract: Electrons in double-layer semiconductor heterostructures experience a special type of spin-orbit interaction that arises in each layer from the perpendicular component of the Coulomb electric field created by electron-density fluctuations in the other layer. We show that this interaction, acting in combination with the usual spin-orbit interaction, can generate a spin current in one layer when a charge current is driven in the other. This effect is distinct symmetrywise from the spin-Hall drag. The spin current is not, in general, perpendicular to the drive current.