2016/01/04 by P. Andreakou, A. V. Mikhailov, S. Cronenberger +9
Physics and Astronomy · #Condensed matter physics #Electric field #Electron #Exciton #Larmor precession #Magnetic field #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Quantum-confined Stark effect #Relaxation (psychology) #Saturation (graph theory) #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Spin polarization #Spins #Stark effect #cond-mat.quant-gas
paper · pdf · doi:10.1103/physrevb.93.115410
published as Phys. Rev. B 93, 115410 (2016) · 9 pages, 4 figures
arxiv created 2016/01/04 · openalex publication_date 2016/03/08 · arxiv updated 2016/03/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Exciton spin lifetimes in semiconductor quantum wells are usually short and decrease when magnetic field is applied in the plane of the structure. The authors here have discovered that in coupled semiconductor quantum wells, the spin lifetime dependence on magnetic field is quite unusual. It strongly increases at low magnetic fields, then saturates and decreases at higher fields. This behavior is a consequence of mixing between direct and indirect exciton states, via the magnetic quantum confined Stark effect. This effect can be a convenient tool for exciton spin engineering, and may complement the traditional quantum confined Stark effect in structures where inhomogeneity is important.