Current rectification by spontaneous symmetry breaking in coupled nanomechanical shuttles.
We investigate the transport and the dynamical properties of tunnel-coupled double charge shuttles. The oscillation frequencies of two shuttles are mode locked to integer multiples of the applied voltage frequency omega. We show that left-right-symmetric double shuttles may generate direct net current due to bistable motions caused by parametric instability. The symmetry-broken direct current appears near omega = Omega0/(2j-1), (j = 1,2,...), where Omega0 is the dressed resonance frequency of the relative motion of the two shuttles.
Ahn
Kang-Hun
KH
Department of Physics, Chungnam National University, Daejeon 305-764, Republic of Korea.
Park
Hee Chul
HC
Wiersig
Jan
J
Hong
Jongbae
J