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  Spatial Distortion of Vibration Modes via Magnetic Correlation of Impurities

Krasniqi, F., Zhong, Y. P., Epp, S. W., Foucar, L., Trigo, M., Chen, J., et al. (2018). Spatial Distortion of Vibration Modes via Magnetic Correlation of Impurities. Physical Review Letters, 120(10): 105501. doi: 10.1103/PhysRevLett.120.105501.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-AB76-A Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8FDC-4
Genre: Journal Article

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PhysRevLett.120.105501.pdf (Publisher version), 807KB
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 Creators:
Krasniqi, F. S.1, 2, Author
Zhong, Y. P.1, 2, 3, Author              
Epp, S. W.1, 3, 4, Author              
Foucar, L.1, 2, Author
Trigo, M.5, Author
Chen, J.5, Author
Reis, D. A.5, Author
Wang, H. L.6, Author
Zhao, J. H.6, Author
Lemke, H. T.7, Author
Zhu, D.7, Author
Chollet, M.7, Author
Fritz, D. M.7, Author
Hartmann, R.8, Author
Englert, L.9, Author
Strüder, L.1, 8, 9, 10, Author
Schlichting, I.1, 2, Author
Ullrich, J.1, 4, Author
Affiliations:
1Max Planck Advanced Study Group at CFEL/DESY, ou_persistent22              
2Max-Planck-Institut für medizinische Forschung, ou_persistent22              
3Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938286              
4Max Planck Institute for Nuclear Physics, ou_persistent22              
5Stanford PULSE and SIMES Institutes, SLAC National Accelerator Laboratory, Menlo Park, ou_persistent22              
6State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, ou_persistent22              
7Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, ou_persistent22              
8PNSensor GmbH, ou_persistent22              
9Max Planck Institute for Extraterrestrial Physics, ou_persistent22              
10Max-Planck-Society Semiconductor Laboratory, ou_persistent22              

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 Abstract: Long wavelength vibrational modes in the ferromagnetic semiconductor Ga0.91Mn0.09As are investigated using time resolved x-ray diffraction. At room temperature, we measure oscillations in the x-ray diffraction intensity corresponding to coherent vibrational modes with well-defined wavelengths. When the correlation of magnetic impurities sets in, we observe the transition of the lattice into a disordered state that does not support coherent modes at large wavelengths. Our measurements point toward a magnetically induced broadening of long wavelength vibrational modes in momentum space and their quasilocalization in the real space. More specifically, long wavelength vibrational modes cannot be assigned to a single wavelength but rather should be represented as a superposition of plane waves with different wavelengths. Our findings have strong implications for the phonon-related processes, especially carrier-phonon and phonon-phonon scattering, which govern the electrical conductivity and thermal management of semiconductor-based devices.

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Language(s): eng - English
 Dates: 2017-06-182018-03-082018-03-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.120.105501
 Degree: -

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Project name : F. S. K., Y. Z., S. W. E., L. F., R. H., L. E., L. S., I. S., and J. U. gratefully acknowledge financial support by the Max Planck Society. M. T., J. C., and D. A. R. were supported by the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. DE-AC02-76SF00515. Use of the LCLS, SLAC National Acceleration Laboratory, is supported by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 120 (10) Sequence Number: 105501 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1