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Floquet-Bloch Oscillations and Intraband Zener Tunneling in an Oblique Spacetime Crystal | | Qiang Gao
; Qian Niu
; | | Date: |
1 Nov 2020 | | Abstract: | We study an oblique spacetime crystal realized by a monoatomic crystal in
which a sound wave propagates, and analyze its quasienergy band structure
originating from a tight-binding Bloch band for the static crystal. We
investigate Floquet-Bloch oscillations under an external field and discover
intraband Zener tunneling which otherwise cannot occur for a rectangular
spacetime crystal with separate space and time periodicities. The intraband
tunneling changes the band topology of the oblique spacetime crystal, resulting
in the possibility of a quantum acoustoelectric generator that converts energy
between the sound wave and a DC electric field in quantized units. | | Source: | arXiv, 2011.00421 | | Services: | Forum | Review | PDF | Favorites | |
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