We usually think of an electron as having one form of kinetic energy, but what if it could have more? In this episode, we delve into the exciting world of electron interactions with Dr. Vianez, whose groundbreaking research focuses on the kinetic energy of an electron's spin and charge by exciting other electrons in a one-dimensional (1D) setting.

Dr. Vianez's work builds upon the Tomonaga-Luttinger model, a theory that successfully captures the physics of interacting electrons in 1D at low energies. However, experiments extending beyond this linear regime have been scarce. Through detailed tunneling spectroscopy measurements in 1D gated wires, Dr. Vianez and his team have observed separate Fermi seas for spin and charge excitations, challenging the traditional understanding of electron energy.

In addition, the team uncovered the emergence of two 1D "replica" modes, shedding light on a new dimension of electron interaction. Furthermore, they manipulated the interaction strength, altering the level of 1D intersubband screening and offering unprecedented insights into electron behavior.

This episode not only deepens our understanding of spin-charge separation in the entire energy band outside the low-energy limit of the Tomonaga-Luttinger model but also helps define the boundary of the newer, nonlinear Tomonaga-Luttinger theory.

Tune in as we journey into the intricate world of electrons with Dr. Vianez, pushing the boundaries of our understanding of quantum physics.

Keywords: Dr. Vianez, electron kinetic energy, Tomonaga-Luttinger model, spin-charge separation, one-dimensional gated wires, tunneling spectroscopy, Fermi seas, intersubband screening, nonlinear Tomonaga-Luttinger theory.

Observing separate spin and charge Fermi seas in a strongly correlated one-dimensional conductor https://doi.org/10.1126/sciadv.abm2781