极低温电测量与分数量子霍尔态的分布
Transport measurement is a common method for studying physics. Ultra-low-temperature quantum transport encompasses rich and interesting physical phenomena, with new problems, ideas, and methods continually emerging. However, even under ideal thermal connection conditions, where the lattice temperature of the fridge is equal to that of the sample, the electron temperature of the sample is still higher than the fridge’s base temperature. In a dilution fridge with an environmental temperature of 10 mK, if no efforts are taken, the electron temperature of the sample typically exceeds 100 mK. Through methods such as filtering, vibration damping, and electromagnetic shielding, the electron temperature can be effectively reduced. This presentation will briefly introduce methods for achieving an ultra-low-temperature transport environment, as well as various technical developments pursued by the presenter. Additionally, it will discuss the search for new fractional quantum Hall states and summarize the patterns observed in most experimentally confirmed fractional states.
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