PMID: 15245061Jul 13, 2004Paper

Unusual oscillation in tunneling magnetoresistance near a quantum critical point in Sr3Ru2O7

Physical Review Letters
J HooperY Maeno

Abstract

We performed single-electron tunneling measurements on bilayer ruthenate Sr3Ru2O7. We observe an unusual oscillation in tunneling magnetoresistance near the metamagnetic quantum phase transition. The characteristic features of this oscillation suggest that it is unrelated to traditional quantum oscillations caused by orbit quantization. In addition, tunneling spectra are found to change sharply in the low bias voltage range of V<2 mV near the transition field. These observations reveal that the Fermi surface of Sr3Ru2O7 changes in a surprising way as the system undergoes strong critical fluctuations.

References

May 1, 1993·Physical Review. B, Condensed Matter·H Yamada
Sep 1, 1993·Physical Review. B, Condensed Matter·A J Millis
Jun 13, 2002·Physical Review Letters·A J MillisS A Grigera
Jul 13, 2004·Physical Review Letters·R A BorziA P Mackenzie

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Citations

Jun 29, 2006·Physical Review Letters·B BinzM Sigrist

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