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Drude weight and superconducting weight.

Raffaele Resta1,2

  • 1CNR-IOM Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, Strada Costiera 11, 34151 Trieste, Italy.

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Summary
This summary is machine-generated.

The Drude weight (D) and superconducting weight (Ds) are key metrics for understanding electrical conductivity and superfluid density. These quantities help distinguish between insulators, metals, and superconductors.

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Area of Science:

  • Condensed matter physics
  • Solid-state physics

Background:

  • The Drude weight (D) quantifies the effective electron density responsible for DC conductivity, vanishing in insulators.
  • It's a universal concept applicable to various metals, including those with disorder and electron-electron interactions.
  • The superconducting weight (Ds) relates to superfluid density and the Meissner effect.

Purpose of the Study:

  • To thoroughly analyze the Drude weight (D) and its implications.
  • To explore the relationship between the Drude weight and orbital magnetization in band metals.
  • To establish D and Ds as primary criteria for classifying materials as insulators, metals, or superconductors.

Main Methods:

  • Theoretical analysis of the Drude weight (D).
  • Investigation of the relationship between D and orbital magnetization in band metals.
  • Comparative analysis of D and Ds for material classification.

Main Results:

  • The Drude weight (D) is a general measure of charge stiffness in metals.
  • A close relationship between the Drude weight (D) and orbital magnetization was identified in band metals.
  • D and Ds serve as crucial discriminators between insulators, metals, and superconductors.

Conclusions:

  • The Drude weight (D) and superconducting weight (Ds) are fundamental quantities in condensed matter physics.
  • Understanding these weights is essential for characterizing electronic properties of materials.
  • These weights provide a unified framework for classifying materials based on their conductive and superfluid behaviors.