1. (a) A 1D crystal consists of N (N +00) basis points separated by a lattice constant a. Sketch the energy band structu

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1. (a) A 1D crystal consists of N (N +00) basis points separated by a lattice constant a. Sketch the energy band structu

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1 A A 1d Crystal Consists Of N N 00 Basis Points Separated By A Lattice Constant A Sketch The Energy Band Structu 1
1 A A 1d Crystal Consists Of N N 00 Basis Points Separated By A Lattice Constant A Sketch The Energy Band Structu 1 (39.48 KiB) Viewed 35 times
1. (a) A 1D crystal consists of N (N +00) basis points separated by a lattice constant a. Sketch the energy band structure of the nearly-free-electron model (NFEM) of the 1D crystal. (b) Based on your sketch, briefly describe classification of ID conductor and insulator in terms of the valence electron number per crystal basis. Hence answer: i. Under high pressure, hydrogen molecules are connected to form molec- ular chains (1D crystal with two hydrogen atoms per basis). Is such a molecular chain a conductor or an insulator according to NFEM? ii. Under further increasing pressure, atomic hydrogen chains (1D crystal with one hydrogen atom per basis) were observed'. Is such a hydrogen chain a conductor or an insulator according to NFEM?
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