2003/01/13 by D. Rosenberg, P. Nalbach, D. D. Osheroff · 2 citations
Materials Science · Physics and Astronomy · #Glass properties and applications #Material Dynamics and Properties #Phase-change materials and chalcogenides #cond-mat
paper · pdf · doi:10.1103/physrevlett.90.195501
4 pages, 5 figures
arxiv created 2003/01/13 · openalex publication_date 2003/05/13 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
At temperatures below 1 K, the capacitance of a glass sample changes due to the application of a dc field in accordance with Burin's dipole gap theory [J. Low Temp. Phys. 100, 309 (1995)]]. However, we now report that below 20 mK, during the first sweep cycle of the dc electric field, the capacitance is smaller by about 10(-5) compared to any subsequent sweep. Despite this overall shift, the field dependence follows the dipole gap predictions. In a subsequent sweep to higher dc fields the dielectric constant drops by about 10(-5) as soon as the applied field is higher than any field previously applied. A picture involving the dynamics of resonant pairs provides a qualitative description of this behavior.