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Related Experiment Videos

Multiple first-order metamagnetic transitions and quantum oscillations in ultrapure Sr3Ru2O7.

R S Perry1, K Kitagawa, S A Grigera

  • 1Kyoto University International Innovation Center, Kyoto 606-8501, Japan.

Physical Review Letters
|June 1, 2004
PubMed
Summary

Measurements on Sr3Ru2O7 reveal quantum oscillations and anomalous resistivity near its metamagnetic transition. Decreasing disorder enhances resistivity minima, indicating complex quantum critical behavior in this bilayered ruthenate metal.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Materials

Background:

  • Sr3Ru2O7 is a bilayered ruthenate metal exhibiting a magnetic-field-tuned quantum critical point.
  • Understanding the electronic properties near quantum criticality is crucial for developing new materials and technologies.

Purpose of the Study:

  • To investigate the quantum oscillations and resistivity behavior of ultraclean single crystals of Sr3Ru2O7.
  • To explore the relationship between Fermi surface changes, magnetization, and the metamagnetic transition.
  • To characterize the anomalous resistivity behavior near the quantum critical point and its dependence on disorder.

Main Methods:

  • Resistivity measurements on ultraclean single crystals of Sr3Ru2O7.
  • Application of magnetic fields to tune the quantum critical point and induce metamagnetic transitions.

Related Experiment Videos

  • Analysis of quantum oscillations in resistivity to probe Fermi surface properties.
  • Temperature-dependent resistivity measurements to study anomalous behavior and disorder effects.

    • Main Results:

    • Quantum oscillations with differing frequencies were observed below and above the metamagnetic transition, consistent with small Fermi surface volume changes.
    • A strong enhancement of resistivity was found in a narrow magnetic field window near the metamagnetic field.
    • A temperature-dependent resistivity minimum below 1 K became more pronounced with decreasing disorder.
    • The anomalous behavior was bounded by two first-order phase transitions at low temperatures.

    Conclusions:

    • The observed phenomena in Sr3Ru2O7 provide insights into the complex interplay of electronic correlations, magnetic fields, and disorder near a quantum critical point.
    • The findings suggest a small change in Fermi surface volume across the metamagnetic transition, aligning with magnetization data.
    • Further research is warranted to fully elucidate the nature of the anomalous resistivity and phase transitions in this material.