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Chih-Wei Chen1, Jesse Choe, E Morosan

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Strong electron correlations drive phenomena in charge density wave (CDW) systems. This review surveys CDW mechanisms, emergent phenomena, and their interplay with magnetism and superconductivity.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science

Background:

  • Strong electron correlations are fundamental to many physical phenomena.
  • Charge Density Waves (CDWs) are a key area of condensed matter research.
  • Understanding CDW mechanisms is crucial for exploring emergent quantum states.

Purpose of the Study:

  • To survey the mechanisms underlying electron correlations in CDW systems.
  • To review theoretical understanding and experimental evidence for CDW transitions.
  • To focus on emergent phenomena arising from CDW interactions with other electronic states.

Main Methods:

  • Review of theoretical models for CDW formation in 1D, 2D, and 3D systems.
  • Analysis of experimental evidence supporting CDW transitions.
  • Examination of the interplay between CDWs and magnetism, superconductivity, and quantum criticality.

Main Results:

  • CDW systems exhibit complex emergent phenomena when interacting with magnetic and superconducting states.
  • CDW mechanisms are prevalent in high-temperature superconductors (cuprates) and transition metal dichalcogenides.
  • Competition between magnetic fluctuations and electronic instabilities can lead to quantum criticality.

Conclusions:

  • Electron correlations in CDW systems are central to diverse physical phenomena.
  • The interaction of CDWs with other electronic states, like magnetism and superconductivity, yields significant emergent properties.
  • Investigating CDW systems offers insights into quantum criticality and novel material functionalities.