Non-charge degrees of freedom of electron waves in solids
We describe the transfer and manipulation of non-charge quantum degrees of freedom in solid matter. In particular, we focus on the measurement and control of the phase of an electron wave function achieved by realizing a true two-path interferometer, and generation and detection of the pure valley current in bilayer graphene. Realization of the two-path interferometer opens a path to quantum electron optics, where the quantum states of traveling electrons are manipulated at the unit of a single electron or single quasi-particle. Demonstration of the pure valley current, or the valley Hall effect, is also an important step towards development of novel electronic devices, where the current of non-charge degrees of freedom plays a major role.
- 1 RIKEN Center for Emergent Matter Science