Home
For authors
Submission status

Current
Archive
Archive (English)
   Volumes 21-40
   Volumes 1-20
   Volumes 41-62
      Volume 62
      Volume 61
      Volume 60
      Volume 59
      Volume 58
      Volume 57
      Volume 56
      Volume 55
      Volume 54
      Volume 53
      Volume 52
      Volume 51
      Volume 50
      Volume 49
      Volume 48
      Volume 47
      Volume 46
      Volume 45
      Volume 44
      Volume 43
      Volume 42
      Volume 41
Search
VOLUME 62 | ISSUE 11 | PAGE 894
Nonlocalizability of contact phenomena in composite, two-dimensional charged systems
A two-imensional Corbino disk is used as an example to show that contact of an initially neutral, two-dimensional electronic system (2DEG) with "external" metal electrodes, whose internal characteristics are different from the 2DEG (the work functions are different), leads to breakdown of local neutrality of the two-dimensional part of the disk over the entire width of the disk. A classical description is given of anomalously long contact nonuniformities in the distribution of the 2D electron density. The role of quantum corrections to the classical theory is discussed. The effect of contact nonuniformities of the density on the linear part of the current-voltage characteristic of a Corbino sample under the conditions of the quantum Hall effect is discussed. The available experimental data for a Corbino disk, which indicate the existence of an equilibrium nonuniformity of the 2D electron density in the disk, are evaluated. In particular, the contact potential difference in this system is estimated. © 1995 American Institute of Physics.




Permission given by American Institute of Physics is appreciated.