Impact of nuclear spin cooling on carrier spin coherence (A06)

• Subject Area: Experimental Condensed Matter Physics
• Term: from 2015 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 249492093

The project objective is to investigate the possibility to increase the spin coherence time of charge carriers interacting with the nuclear spin system providing deep cooling of the nuclear spins. This would allow us to suppress spin fluctuations of the lattice nuclei known to be one of the main factors limiting the coherence time of charge carriers in semiconductors. We will optimize the dynamic nuclear polarization for reaching a high nuclear spin ordering and investigate experimentally and theoretically the coherent spin dynamics of carriers and nuclei in this situation. We will also search for a spin-ordered nuclear state in the deeply cooled nuclear spin system.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 160: Coherent manipulation of interacting spin excitations in tailored semiconductors
• Applicant Institution: Technische Universität Dortmund
• Co-Applicant Institution: Russian Academy of Sciences ; Ioffe Institute, until 2/2022; Saint Petersburg University, until 2/2022
• Project Heads: Roman Cherbunin, from 1/2019 until 2/2022; Professor Dr. Ivan V. Ignatiev, until 12/2018; Dr. Kirill Kavokin, until 2/2022; Professor Dr. Dieter Suter; Professor Dmitri Yakovlev, Ph.D.