Excitations in Biphenyl's Incommensurate Phase III
- 25 May 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 58 (21), 2232-2234
- https://doi.org/10.1103/physrevlett.58.2232
Abstract
Recent measurements of proton spin resonance in biphenyl showed a strong relaxation mechanism below 15 K with a surprisingly high activation energy of 172 K. We show quantitatively that this relaxation mode can be the shifting of the modulation boundaries in the metastable incommensurate phase III, and we explain the apparently high energy. The calculations are based on a microscopic theory of both the I-II and II-III phase transitions including the effects of pressure, which makes biphenyl the best understood incommensurate material.Keywords
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