Flexoelectronic doping of the degenerate silicon and the correlated electron behavior

Abstract

In metal/degenerately doped silicon bilayer structure, the interfacial flexoelectric effect due to strain gradient leads to charge carrier transfer from metal layer to the silicon layer. This excess charge carrier concentration is called flexoelectronic doping or flexoelectronic charge transfer, which gives rise to an electronically polarized (order of magnitude larger than ferroelectric materials) silicon layer. In the transport measurements, the charge carrier concentration in silicon is found to increase by two orders of magnitude due to flexoelectronic doping, which changes the Fermi level and the Hall response. The flexoelectronic charge accumulation modifies the electron-electron and the electron phonon coupling, which gives rise to Mott metal-insulator transition and magnetism of phonons, respectively. The coexistence of flexoelectronic polarization and magnetism gives rise to a new class of materials called electronic multiferroics. By controlling the flexoelectronic doping, material behavior can potentially be engineered for quantum, spintronics and electronics applications in semiconductor materials.

References in corpus (5)

• Orbital magnetic moments of phonons
• Enhanced flexoelectricity at reduced dimensions revealed by mechanically tunable quantum tunnelling
• Large Magnetic Moment in Flexoelectronic Silicon at Room Temperature
• Spin driven emergent antiferromagnetism and metal insulator transition in nanoscale p-Si
• Giant Flexoelectricity in Bent Silicon Thinfilms

Cited by in corpus (4)

• Oscillatory Hall effect from magnetoelectronic coupling in flexoelectronic silicon
• Evidence of magnetoelectronic electromagnon mediated transport in flexoelectronic heterostructures
• A semiclassical nonequilibrium Green's Function approach to electron transport in systems exhibiting electron-phonon couplings
• Interlayer charge transfer from contact electrification in conducting micro and nanoscale thin film heterostructures