Bi-stability in a two-level quantum dot with attracting e-e interaction

作者：Eskandari asl Amir^*

来源：Physica B: Condensed Matter , 2016, 503: 51-54.

DOI：10.1016/j.physb.2016.09.018

• e-e attraction
• Hartree-Fock approximation
• Bi-stability
• Hysteresis
• Quantum phase transition

By considering a current carrying two-level quantum dot (QD) with e-e attraction, we obtain the current and electron populations as functions of applied bias voltage using a self-consistent Hartree-Fock (HF) approximation and show that the system could be bi-stable and there exist hysteresis loops. Investigating the permanent polarization, we also show that the permanent polarization changes sign and interpret this as a quantum phase transition, since our system is at zero temperature.

• 出版日期2016-12-15