The Piezoaxionic Effect

Understand

Axion dark matter (DM) constitutes an oscillating background that violates parity and time-reversal symmtries.

• Inside piezoelectric crystals, where parity is broken spontaneously, this axion background can result in a stress.
• We call this new phenomenon "the piezoaxionic effect".
• When the frequency of axion DM matches the natural frequency of a bulk acoustic normal mode of the piezoelectric crystal, the piezoaxionic effect is resonantly enhanced and can be read out electrically via the piezoelectric effect.