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Friday, November 15, 2002
Physics Building, Room 204
Note special time.
[Host: Eugene Kolomeisky]
" 0.7-anomaly in Quantum Point Contacts A"
A remarkable property of one-dimensional conductors is the
quantization of their resistance in units of Planck constant divided
by the square of the elementary charge. This effect is well
understood and readily observed in low-temperature experiments with
relatively short one-dimensional conductors called the quantum point
contacts. A puzzling feature of the transport through such contacts
was reported a few years ago, when it was discovered that at somewhat
higher temperatures the conduction drops to about 0.7 of its quantized
value. This phenomenon, often referred to as the 0.7-anomaly, has
been studied extensively in the last few years. I will discuss the
latest experimental data and the theoretical attempts at understanding
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