Electronic Structure of Helium Atom in a Quantum Dot  

作　　者：Jayanta K.Saha S.Bhattacharyya T.K.Mukherjee 

机构地区：[1]Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India [2]Aliah University, IIA/27, New Town, Kolkata 700156, India [3]Acharyya Prafulla Chandra College, New Barrackpore, Kolkata 700131, India [4]Narula Institute of Technology, Agarpara, Kolkata 700109, India

出　　处：《Communications in Theoretical Physics》2016年第3期347-353,共7页理论物理通讯（英文版）

基　　金：Financial Support under Grant No.37(3)/14/27/2014-BRNS from the Department of Atomic Energy,BRNS,Government of India;Financial Support under Grant No.PSW-160/14-15(ERO)from University Grants Commission,Government of India

摘　　要：Bound and resonance states of helium atom have been investigated inside a quantum dot by using explicitly correlated Hylleraas type basis set within the framework of stabilization method.To be specific,precise energy eigenvalues of bound 1sns(~1S^e)(n=1-6)states and the resonance parameters i.e.positions and widths of^lS^e states due to 2sns(n=2-5)and 2pnp(n=2-5)configurations of confined helium below N=2 ionization threshold of He^+have been estimated.The two-parameter(Depth and Width)finite oscillator potential is used to represent the confining potential due to the quantum dot.It has been explicitly demonstrated that the electronic structural properties become sensitive functions of the dot size.It is observed from the calculations of ionization potential that the stability of an impurity ion within a quantum dot may be manipulated by varying the confinement parameters.A possibility of controlling the autoionization lifetime of doubly excited states of two-electron ions by tuning the width of the quantum cavity is also discussed here.

关 键 词：helium atom variational method quantum dot CORRELATION 

分 类 号：O471.1[理学—半导体物理]