Quantum oscillation and decoherence in triangular antidot lattice

Quantum oscillation phenomena in triangular antidot lattice have been investigated. Altshuler–Aronov–Spivak oscillations and Aharonov–Bohm (AB)-type oscillations are observed at low magnetic field, and AB-type oscillations due to edge channels are observed in the quantum Hall regime. Measurements of the temperature dependence of these oscillations furnish information on the mechanism of decoherence in the antidot lattice, which is compared with the single ring case.