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Sliding charge-density wave in manganites.

Susan Cox1, J Singleton, R D McDonald

  • 1National High Magnetic Field Laboratory, Ms-E536, Los Alamos National Laboratory, New Mexico 87545, USA. scox@lanl.gov

Nature Materials
|December 7, 2007
PubMed
Summary
This summary is machine-generated.

The stripe phase in manganites is reinterpreted as a charge-density wave (CDW) exhibiting collective transport. This finding suggests that complex behaviors in these materials may arise from the interplay of CDW phases and disorder.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Solid-State Chemistry

Background:

  • Stripe and chequerboard phases in metal oxides are linked to exotic phenomena like high-temperature superconductivity and colossal magnetoresistance.
  • Understanding these phases is crucial for advancing materials science and condensed matter physics.
  • The stripe phase in manganites has been traditionally viewed as charge localization.

Purpose of the Study:

  • To investigate the fundamental nature of the stripe phase in manganites.
  • To re-evaluate the interpretation of the manganite stripe phase.
  • To explore the transport properties of La(0.50)Ca(0.50)MnO(3).

Main Methods:

  • Detailed resistance measurements on La(0.50)Ca(0.50)MnO(3).
  • Analysis of hysteresis effects in resistance.
  • Characterization of broadband noise properties.

Main Results:

  • Resistance measurements strongly indicate a charge-density wave (CDW) state in the manganite stripe phase.
  • Observed dramatic resistance hysteresis and broadband noise are characteristic of collective CDW transport.
  • The behavior aligns with well-established disordered CDW materials.

Conclusions:

  • The manganite stripe phase is likely a prototypical charge-density wave (CDW) with collective transport properties.
  • Unusual transport and structural properties in manganites may not require exotic physics.
  • These properties can emerge from the coexistence of a CDW phase and inherent material disorder.