# Nanometer Scale Dielectric Fluctuations at the Glass Transition

Source: [Nanometer Scale Dielectric Fluctuations at the Glass Transition](<https://www.sota2.com/research/paper/68fa248f2c2a3760193a5dab>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T09:18:10.151Z

Authors: E. Vidal Russell, N. E. Israeloff, L. E. Walther, H. Alvarez Gomariz

Published: 1998-07-08T22:16:22.000Z

## Abstract

Using non-contact scanning probe microscopy (SPM) techniques, dielectric properties were studied on 50 nanometer length scales in poly-vinyl-acetate (PVAc) films in the vicinity of the glass transition. Low frequency (1/f) noise observed in the measurements, was shown to arise from thermal fluctuations of the electric polarization. Anomalous variations observed in the noise spectrum provide direct evidence for cooperative nano-regions with heterogeneous kinetics. The cooperative length scale was determined. Heterogeneity was long-lived only well below the glass transition for faster than average processes.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/9807126>)

[PDF](<https://arxiv.org/pdf/cond-mat/9807126.pdf>)