Can surface states of a one-dimensional model lie in the allowed energy bands? |
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| Authors: | Maria Steślicka |
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| Affiliation: | Quantum Theory Group, Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 |
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| Abstract: | The existence conditions for surface states of a semi-infinite Kronig-Penney model, recently reported by Roy and Tripathy, are analyzed critically and it is shown that the surface state energies must always lie in the forbidden gaps. |
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