STUDY OF EFFECT OF SURFACE-OPTICAL PHONON ON BIPOLARON IN QUANTUM-WELL WIRE  

作　　者：李泽民 顾世洧 林长净 

出　　处：《Journal of Shanghai Jiaotong university(Science)》1997年第1期11-17,共7页上海交通大学学报（英文版）

摘　　要：The motion of a bipolaron in the quantum well wire(QWW) has been investigated based on weakly or intermediately coupling with the surface optical phonon.This kind of system,in some sense,may represent the behaviour of bipolaron in high temperature ceramic superconductors.The Hamiltonian of the system is first transformed by double unitary transformation,so that some of the relevant quantities,such as the phonon induced potential energies V e so and U e so( z) ,can be calculated.The results of our calculation indicate that both of the phonon induced potential energies are strengthened as the radius ρ o of the QWW becomes thinner.However,this is valid merely for ρ o to be greater than a specific value that corresponds to the minimum of the energy.The total effective potential energy V eff ( z ) for the bipolaron in the QWW is also evaluated.The result of this wholy effective potential energy indicates that there is an equilibrium position for the two electrons which form the bipolaron.This position depends also on the radius of the QWW.The justification for our theoretical calculations awaits experimental results for future development in the low dimensional structure of superconductivity.ＳＴＵＤＹＯＦＥＦＦＥＣＴＯＦＳＵＲＦＡＣＥ┐ＯＰＴＩＣＡＬＰＨＯＮＯＮＯＮＢＩＰＯＬＡＲＯＮＩＮＱＵＡＮＴＵＭ┐ＷＥＬＬＷＩＲＥＣ．ＭＬｅ（李泽民）ＧｕＳｈｉｗｅｉ＊（顾世洧）Ｃ．ＣＬａｍ（林长净）（Ｄｅｐｔ．ｏｆＰｈｙｓｉｃｓａｎｄＭａｔｅｒｉａ...

关 键 词：quantum WELL WIRE BIPOLARON PHONON SUPERCONDUCTIVITY 

分 类 号：O511[理学—低温物理]