39K NMR evidence for a phason gap in K2SeO4

Topič, B.; Haeberlen, U.; Blinc, R.

doi:10.1103/physrevb.40.799

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39K NMR evidence for a phason gap in K2SeO4

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Topič, B.
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;

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Haeberlen, U.
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;

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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.40.799
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引用

Topič, B., Haeberlen, U., & Blinc, R. (1989). 39K NMR evidence for a phason gap in K2SeO4. Physical Review B, 40(1), 799-801. doi: 10.1103/physrevb.40.799.

引用: https://hdl.handle.net/21.11116/0000-000B-4EE3-E

要旨

The temperature dependence of the 39K spin-lattice relaxation time T1 has been measured in the paraelectric and incommensurate phases of K2SeO4. The phason and amplitudon contributions to T1 have been determined from the variation of T−11 over the incommensurate line. We found that in K2SeO4 the modulation wave is pinned to the underlying crystal lattice and that a gap of about 160 GHz exists in the phason excitation spectrum.