PQI/ Condensed Matter Seminar

December 15, 2016 - 9:00pm to 10:00pm

Title: Dipolar exciton condensation in one-dimensional materials
 
Abstract: We demonstrate that spatially separated populations of one-dimensional electrons and holes may form a true condensate of dipolar excitons characterised by off-diagonal long range order and global phase coherence. This is unexpected, since the Mermin-Wagner theorem states that long range order should not exist in 1D systems. 
However, we show that adding a single particle hybridization between the electron and hole populations breaks a continuous symmetry and allows many body effects to dominate the ground state. The superfluid condensate may have important technological applications in transistor and thermoelectric devices.

Location and Address

321 Allen Hall