Metallic state in a strongly interacting spinless two-valley electron system in two dimensions
Journal
Physical Review B
Journal Volume
101
Journal Issue
4
Date Issued
2020
Author(s)
Abstract
We have studied the strongly interacting, two-valley two-dimensional (2D) electron system in ultrahigh mobility SiGe/Si/SiGe quantum wells in parallel magnetic fields strong enough to completely polarize the electron spins thus making the electron system "spinless." It occurs that the metallic temperature dependence of the resistivity, although weaker than that in the absence of magnetic field, still remains strong even when the spin degree of freedom is removed. Several independent methods have been used to establish the existence of the genuine MIT in the spinless two-valley 2D system. This is in contrast to the previous results obtained on more disordered silicon samples, where the polarizing magnetic field causes a complete quench of the metallic temperature behavior. ? 2020 American Physical Society.
Subjects
Degrees of freedom (mechanics); Electrospinning; Landforms; Magnetic fields; Temperature distribution; Electron systems; Metallic state; Metallic temperature dependence; Parallel magnetic field; Polarizing magnetic fields; Silicon samples; Temperature behavior; Two Dimensional (2 D); Electrons
SDGs
Type
journal article