Publications by authors named "Colin Ming Earn Chow"
Article Synopsis
- Auger recombination in semiconductors involves electrons and holes recombining while exciting other charge carriers, with excess energy typically converted to heat.
- The researchers developed a method to detect Auger-excited carriers by observing the current generated when they tunnel through a barrier in a specific semiconductor setup using WSe, hexagonal boron nitride, and graphite.
- Their findings reveal strong Auger scattering even with weak excitation and add new techniques for studying relaxation processes in two-dimensional materials.
We demonstrate the suppression of nuclear-spin fluctuations in an InAs quantum dot and measure the timescales of the spin narrowing effect. By initializing for tens of milliseconds with two continuous wave diode lasers, fluctuations of the nuclear spins are suppressed via the hole-assisted dynamic nuclear polarization feedback mechanism. The fluctuation narrowed state persists in the dark (absent light illumination) for well over 1 s even in the presence of a varying electron charge and spin polarization.
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