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Journal articles
Dielectric Constant of Glasses: Evidence for Dipole-Dipole Interactions
Abstract : The 1 kHz real part chi(') of the dielectric constant of a structural glass (a-SiO(2+x)C(1+y)H(z)) was measured at low temperature T. Reducing the sample thickness h below 100 nm weakens the slope /delta(chi('))/delta (T) for T less than or approximately equal 0.1 K, for all measuring fields E. This contrasts with the predictions of the two-level system (TLS) model but is in agreement with the recently proposed delocalization of excitations derived from a field-induced TLS-TLS interaction mechanism. For small h this interaction is screened, which explains the h effects on chi('). Hence, interactions must play a key role in standard thick samples as soon as T less than or approximately equal 0.1 K.
Cited literature [10 references]
https://hal-cea.archives-ouvertes.fr/cea-01395448
Contributor : Dominique Girard <>
Submitted on : Thursday, November 10, 2016 - 4:46:28 PM
Last modification on : Monday, February 10, 2020 - 6:13:46 PM
Long-term archiving on: : Monday, March 20, 2017 - 9:37:48 PM
Contributor : Dominique Girard <>
Submitted on : Thursday, November 10, 2016 - 4:46:28 PM
Last modification on : Monday, February 10, 2020 - 6:13:46 PM
Long-term archiving on: : Monday, March 20, 2017 - 9:37:48 PM
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PhysRevLett.90.205501.pdf
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