Transition between Stationary and Moving High‐Field Domains in CdS in a Range of N‐Shaped Negative Differential Conductivity due to Field‐Quenching

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Abstract
In CdS, unstable moving domains are observed, which exist in a current‐voltage range between the range for stationary electrode‐adjacent domains and the range for transitions to undeformed moving domains. These current–voltage ranges have been investigated in the same crystal by changing the electron concentration at the boundary of a pseudocathode. Several CdS crystals, differently doped with Ag, Al, and Cu, have been investigated. An electro‐optical method using the Franz‐Keldysh effect was employed for domain observation. The influence of the distance between the electrodes on domain formation is discussed.