Transmission coefficients and Hall resistance in a small cross-shaped semiconductor junction
S K Greene; M Pepper; D A Wharam; D C Peacock; D A Ritchie; J E F Frost; D G Hasko; H Ahmed; G A C Jones; S K Greene; Cavendish Lab., Cambridge Univ., UK; M Pepper; Cavendish Lab., Cambridge Univ., UK; D A Wharam; Cavendish Lab., Cambridge Univ., UK; D C Peacock; Cavendish Lab., Cambridge Univ., UK; D A Ritchie; Cavendish Lab., Cambridge Univ., UK; J E F Frost; Cavendish Lab., Cambridge Univ., UK; D G Hasko; Cavendish Lab., Cambridge Univ., UK; H Ahmed; Cavendish Lab., Cambridge Univ., UK; G A C Jones; Cavendish Lab., Cambridge Univ., UK
Журнал:
Journal of Physics: Condensed Matter
Дата:
1991-03-25
Аннотация:
A method is described that measures both the transmission coefficients and the Hall resistance for a narrow cross. Buttiker's formula relating these quantities has been verified. The amount of collimation is estimated from the magnetoresistance and shown to be small, with approximately=5% more electrons travelling straight on at the cross in zero magnetic field compared with a magnetic field of 0.1 T. This illustrates that the reason for the quenching of the Hall effect here is a scrambling mechanism rather than the collimation mechanism.
341.8Кб