Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study
We report on the numerical and experimental study of the vibrational spectrum of the charge-density-wave (CDW) conductor (TaSe4)(2)I. The microscopic mechanism accounting for the giant IR peak at frequencies about similar to 40 cm(-1) in the (TaSe4)(2)I is proposed. The mechanism is based on an assu...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
1998
|
| _version_ | 1797071817839476736 |
|---|---|
| author | Burlakov, V Moskalenko, M Berner, D Geserich, H Zibold, A Tanner, D Levy, F Berger, H |
| author_facet | Burlakov, V Moskalenko, M Berner, D Geserich, H Zibold, A Tanner, D Levy, F Berger, H |
| author_sort | Burlakov, V |
| collection | OXFORD |
| description | We report on the numerical and experimental study of the vibrational spectrum of the charge-density-wave (CDW) conductor (TaSe4)(2)I. The microscopic mechanism accounting for the giant IR peak at frequencies about similar to 40 cm(-1) in the (TaSe4)(2)I is proposed. The mechanism is based on an assumption about dynamical charge transfer between adjacent CDW periods accompanying their vibration in corresponding normal mode with wave vector equal to that of superstructure. The mechanism is consistent also with the increase in the IR intensity of the peak observed experimentally when heating the (TaSe4)(2)I crystal above the Peierls transition temperature T-p = 261 K. Critical index of the Peierls transition order parameter determined from the temperature dependence of the phase phonons intensity is found to be about 0.17, consistent with the results of X-ray experiments. (C) 1998 Elsevier Science B.V. All rights reserved. |
| first_indexed | 2024-03-06T22:58:42Z |
| format | Journal article |
| id | oxford-uuid:6153907a-d800-4bd3-93f9-27b00230e0fc |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:58:42Z |
| publishDate | 1998 |
| record_format | dspace |
| spelling | oxford-uuid:6153907a-d800-4bd3-93f9-27b00230e0fc2022-03-26T17:59:05ZVibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental studyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6153907a-d800-4bd3-93f9-27b00230e0fcEnglishSymplectic Elements at Oxford1998Burlakov, VMoskalenko, MBerner, DGeserich, HZibold, ATanner, DLevy, FBerger, HWe report on the numerical and experimental study of the vibrational spectrum of the charge-density-wave (CDW) conductor (TaSe4)(2)I. The microscopic mechanism accounting for the giant IR peak at frequencies about similar to 40 cm(-1) in the (TaSe4)(2)I is proposed. The mechanism is based on an assumption about dynamical charge transfer between adjacent CDW periods accompanying their vibration in corresponding normal mode with wave vector equal to that of superstructure. The mechanism is consistent also with the increase in the IR intensity of the peak observed experimentally when heating the (TaSe4)(2)I crystal above the Peierls transition temperature T-p = 261 K. Critical index of the Peierls transition order parameter determined from the temperature dependence of the phase phonons intensity is found to be about 0.17, consistent with the results of X-ray experiments. (C) 1998 Elsevier Science B.V. All rights reserved. |
| spellingShingle | Burlakov, V Moskalenko, M Berner, D Geserich, H Zibold, A Tanner, D Levy, F Berger, H Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study |
| title | Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study |
| title_full | Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study |
| title_fullStr | Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study |
| title_full_unstemmed | Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study |
| title_short | Vibrational properties of the CDW condensate in the quasi-one-dimensional conductor (TaSe4)(2)I: Numerical and experimental study |
| title_sort | vibrational properties of the cdw condensate in the quasi one dimensional conductor tase4 2 i numerical and experimental study |
| work_keys_str_mv | AT burlakovv vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT moskalenkom vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT bernerd vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT geserichh vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT zibolda vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT tannerd vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT levyf vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy AT bergerh vibrationalpropertiesofthecdwcondensateinthequasionedimensionalconductortase42inumericalandexperimentalstudy |