Detecting an exciton crystal by statistical means

作者：Breyel D; Soller H^*; Schmidt T L; Komnik A

来源：Physica B: Condensed Matter , 2014, 441: 33-36.

DOI：10.1016/j.physb.2014.01.042

• Exciton
• Wigner crystal
• Exact cliagonalization
• Laser

We investigate art ensemble of excitons in a coupled quantum well excited via an applied laser field. Using an effective disordered quantum Ising model, we perform a numerical simulation of the experimental procedure and calculate the probability distribution function P(M) to create M excitons as well as their correlation function, It shows clear evidence of the existence of two phases corresponding to a liquid and a crystal phase. We demonstrate that not only the correlation function but also the distribution P(M) is very well suited to monitor this transition.

• 出版日期2014-5-15