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Giant dielectric constants at the approach to the insulator-metal transition

Hess, Harald F. and DeConde, Keith and Rosenbaum, T. F. and Thomas, G. A. (1982) Giant dielectric constants at the approach to the insulator-metal transition. Physical Review B, 25 (8). pp. 5578-5580. ISSN 1098-0121. doi:10.1103/PhysRevB.25.5578.

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We have measured the real and imaginary parts of the dielectric susceptibility of insulating samples of P-doped Si at millikelvin temperatures at 400 MHz using a resonant transmission cavity. We find that the real part is enhanced by more than two orders of magnitude over the isolated donor polarizability, and we determine the exponent which describes the critical divergence of the real part at the insulator-metal transition by fitting the temperature dependence of the corresponding imaginary part. The form of the observed divergence remains unexplained theoretically.

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Additional Information:© 1982 The American Physical Society. Received 25 February 1982. The work at Princeton University was partially supported by Grant No. DMR 81-04414 from the NSF.
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NSFDMR 81-04414
Issue or Number:8
Record Number:CaltechAUTHORS:20140707-163042026
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47052
Deposited By: George Porter
Deposited On:09 Jul 2014 15:25
Last Modified:10 Nov 2021 17:34

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