Phys. Rev. Lett. 80, 2669–2672 (1998)Spontaneous dc Current Generation in a Resistively Shunted Semiconductor Superlattice Driven by a Terahertz FieldReceived 22 August 1997; published in the issue dated 23 March 1998 We study a resistively shunted semiconductor superlattice subject to a high-frequency electric field. Using a balance equation approach that incorporates the influence of the electric circuit, we determine numerically a range of amplitude and frequency of the ac field for which a dc bias and current are generated spontaneously and show that this region is likely accessible to current experiments. Our simulations reveal that the Bloch frequency corresponding to the spontaneous dc bias is approximately an integer multiple of the ac field frequency. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.2669
DOI:
10.1103/PhysRevLett.80.2669
PACS:
72.20.Ht, 05.45.+b, 73.20.Dx
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