Magnetic doping of Ge-quantum dots: growth studies exploring the feasibility of modulating QD properties

Abstract

o 0 10 15 20 sample number Figure 1: Compendium of literature data of Curie temperatures for Ge -Mn thin films and nanostructures fabricated using a wide range of deposition methods. This is by no means a complete list but illustrates the breadth in growth methods and magnetic performance which has been reported in recent years. ABSTRACTThe magnetic doping of Ge-QDs is highly coveted and has been pursued for several years. The Ge-Mn-Si substrate system presents a complex challenge, and the competition between dopant integration and formation of silicides, germanides and metastable phases makes the magnetic doping a considerable, and maybe insurmountable challenge. We will discuss the interaction of Mn with all growth surface, Si(100), Ge(100) wetting layer, and Ge{105} QD facet, as well as the co-deposition of Mn and Ge. The monoatomic Mn-wires, which form on Si(100), and their magnetic signatures allow unique insight into the relation between bonding and magnetism. We will close with an outlook on the feasibility of QD manipulation by controlling dopant-surface interactions. KEYWORD LISTGe-quantum dot, doping, spintronics, germanide, Scanning tunneling microscopy, metastable phase, dilute magnetic semiconductor, ferromagnetism. Curie temperature

Microstructure and Ferromagnetism of Mn0.05Ge0.95 Quantum Dots/Graphene Heterostructures for Spintronic Devices

“…Mn x Ge 1– x dilute magnetic semiconductors (DMSs) are considered one of the most promising materials for spintronic devices due to their properties of excitation and response to optical, electrical, and magnetic signals simultaneously. , The spintronic properties of Mn x Ge 1– x QDs can enhance the performance and efficiency of high-density memory devices . Meanwhile, Mn x Ge 1– x DMSs are compatible with CMOS technology while having stable ferromagnetism and a Curie temperature above room temperature, which provides the basis for device operation tuning. , Exploring Mn x Ge 1– x QDs with high Curie temperatures and superior magnetic properties is of significant research interest and holds promising prospects for spintronic devices.…”

“…3 Meanwhile, Mn x Ge 1−x DMSs are compatible with CMOS technology while having stable ferromagnetism and a Curie temperature above room temperature, which provides the basis for device operation tuning. 4,5 Exploring Mn x Ge 1−x QDs with high Curie temperatures and superior magnetic properties is of significant research interest and holds promising prospects for spintronic devices.…”