Phonon Dispersion in ω Helical Poly-L-Phenylalanine

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概要

• 論文の詳細を見る

• Poly(L-Phenylalanine) is the simplest polypeptide which goes into the rare ω form. Complete normal mode calculations and their dispersions are reported using Urey Bradley force field and Higgs method for infinite systems. The results indicate that the modes below 1350 cm^<-1> show appreciable dispersion. Two main chacteristics of the dispersion curves are cross-over between torsional and bending modes at δ=ψ/2 and repulsion with character exchange between junction and ring modes in the neighbourhood of δ=ψ. The crossover within the Brillouin Zone (B-Z) is permissible between different species at the same frequency and it can be called as a "nonfundamental resonance". The regions of high density of states in the neighbourhood of δ= 0.75π are critical points akin to Von Hove Singularities in lattice dynamics. Detailed assignments of various modes are also given.

• 社団法人日本物理学会の論文
• 1995-01-15

著者

• TANDON Poonam

  Physics Department, Lucknow University

• Tandon P

  Physics Department Lucknow University

• Tandon Poonam

  Physics Department Lucknow University

• Srivastava Seema

  Divison Of Biopolymers Central Drug Research Institute

• BURMAN Leena

  Physics Department, Lucknow University

• Rastogi Shantanu

  Physics Department, Lucknow University

• SRIVASTAVA Seema

  Physics Department, Lucknow University

• Rastogi Shantanu

  Physics Department Lucknow University

• Burman Leena

  Physics Department Lucknow University

• Gupta D.

  Physics Department, University of Lucknow

• Gupta P.

  Physics Department, University of Lucknow

• Srivastava Seema

  Physics Department Lucknow University

• Gupta D.

  Physics Department University Of Lucknow

• Gupta P.

  Physics Department University Of Lucknow

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