Dynamics of Single Selenium Chains Confined in One-Dimensional Nanochannels of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>AlPO</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow><mi>−</mi><mn>5</mn></math></span>: Temperature Dependencies of the First- and Second-Order Raman Spectra

Vladimir V. Poborchii; Alexander V. Kolobov; Jürgen Caro; Victor V. Zhuravlev; Kazunobu Tanaka

doi:10.1103/PhysRevLett.82.1955

Dynamics of Single Selenium Chains Confined in One-Dimensional Nanochannels of ${AlPO}_{4} - 5$ : Temperature Dependencies of the First- and Second-Order Raman Spectra

Vladimir V. Poborchii, Alexander V. Kolobov, Jürgen Caro, Victor V. Zhuravlev, and Kazunobu Tanaka

Phys. Rev. Lett. 82, 1955 – Published 1 March 1999

Abstract

The temperature dependence of the Raman spectrum of single helical Se chains in nanochannels of ${AlPO}_{4} - 5$ was studied. Dramatic changes in the spectra due to structure transformations in this one-dimensional system are observed. The chains are found to be ordered at 77 K. Reversible weak disordering of the chains (mainly due to the large-amplitude torsional vibrations) occurs with increasing temperature. At temperatures above $\sim 340 K$ , a phase transition accompanied with a structural relaxation of the chains to the strongly disordered state with unfixed dihedral angles (“torsional melting”) is observed.

Received 30 March 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.1955

Authors & Affiliations

Vladimir V. Poborchii^1,*, Alexander V. Kolobov^2,†, Jürgen Caro³, Victor V. Zhuravlev⁴, and Kazunobu Tanaka²

¹Joint Research Center for Atom Technology-Angstrom Technology Partnership, 1-1-4, Higashi, Tsukuba, Ibaraki 305, Japan
²Joint Research Center for Atom Technology-National Institute for Advanced Interdisciplinary Research, 1-1-4, Higashi, Tsukuba, Ibaraki 305, Japan
³Institute for Applied Chemistry, Rudower Chaussee 5, 12489 Berlin, Germany
⁴Ioffe Physico-Technical Institute, St. Petersburg 194021, Russia