| Material Physics |
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| Bipolaron in different configuration of quantum confinement |
| RUAN Yong-hong, CHEN Qing-hu, JIAO Zheng-kuan |
| Department of Physics, Zhejiang University, Hangzhou 310027, China |
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Abstract The authors used Landau-Pekar variational method to investigate a strong-coupling singlet optical bipolaron in different configuration of quantum confinement. Numerical and analytical results showed that when configuration changes from quantum dot and wire to well, confinement shows different effect on the formation of a bipolaron. In contrast to a bipolaron in a quantum dot or wire, the binding energy of a bipolaron in a quantum well increases with increasing confinement, indicating that confinement favors bipolaron formation in a quantum well.
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Received: 18 February 2004
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