Magnetic field breakdown of electron hydrodynamics

Author(s)

Patricio, M. A. T. ; Jacobsen, G. M. ; Oliveira, V. A. ; Teodoro, M. D. ; Gusev, G. M. ; Bakarov, A. K. ; Pusep, Yu. A.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 110, n. 4, p. 5-pg., 2024-07-08.

Abstract

Using spatially and temporally resolved microphotoluminescence, the effect of a strong magnetic field on the hydrodynamic properties of an electron-hole fluid is studied. The recombination rate of photogenerated holes is related to the rate of their diffusion. In this way, the electronic Venturi effect is observed in a mesoscopic variable-width GaAs channel and is used as a tool to probe the hydrodynamic response. It is shown that a quantizing magnetic field leads to the disappearance of the Venturi effect, which means that electron-hole fluid becomes nonhydrodynamic. The observed transition from the hydrodynamic regime to the nonhydrodynamic one is due to the magnetic field-induced decrease in the electron-electron scattering rate and is similar in nature to viscous negative magnetoresistance. (AU)

• FAPESP's process: 22/02132-0 - Study of carrier and spin dynamics processes in hydrodynamic electron-hole plasma formed in mesoscopic GaAs channels and in AlGaAs and InGaAsP quantum wells
• Grantee: Iouri Poussep
• Support Opportunities: Regular Research Grants
• FAPESP's process: 22/10340-2 - Scientific MUE: acquisition of a high temporal, spatial and spectral resolution fluorescence system operating over a wide temperature range
• Grantee: Gilmar Eugenio Marques
• Support Opportunities: Research Infrastructure Program - Scientific
• FAPESP's process: 21/12470-8 - Research in quantum materiais involving intense magnetic fields and low temperatures
• Grantee: Gennady Gusev
• Support Opportunities: Research Projects - Thematic Grants