Phys. Rev. Lett. 97, 055504 (2006) [4 pages]

Universal Features of Terahertz Absorption in Disordered Materials

Abstract

References

Citing Articles (14)

Download: PDF (429 kB) Buy this article Export: BibTeX or EndNote (RIS)

S. N. Taraskin^1,2,*, S. I. Simdyankin², S. R. Elliott², J. R. Neilson^2,3, and T. Lo⁴
¹St. Catharine’s College, Trumpington Street, Cambridge CB2 1RL, United Kingdom
²Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
³Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
⁴Teraview Ltd., Platinum Building, St. John’s Innovation Park, Cambridge CB4 OW5, United Kingdom

Received 10 March 2006; published 2 August 2006

Using an analytical theory, experimental terahertz time-domain spectroscopy data, and numerical evidence, we demonstrate that the frequency dependence of the absorption coupling coefficient between far-infrared photons and atomic vibrations in disordered materials has the universal functional form, C(ω)=A+Bω², where the material-specific constants A and B are related to the distributions of fluctuating charges obeying global and local charge neutrality, respectively.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.97.055504

DOI:

10.1103/PhysRevLett.97.055504

PACS:

63.50.+x, 61.43.Fs, 78.30.Ly

^*Electronic address: snt1000@cam.ac.uk

About | Terms and Conditions | Subscriptions | Search | Help

Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.

Citation Search:

Phys. Rev. Lett. 97, 055504 (2006) [4 pages]

Universal Features of Terahertz Absorption in Disordered Materials