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Related Concept Videos

Resistivity01:22

Resistivity

6.3K
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
6.3K
Resistance01:19

Resistance

8.0K
When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
8.0K
Non-ohmic Devices00:51

Non-ohmic Devices

1.7K
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
1.7K
Ohm's Law01:19

Ohm's Law

3.0K
Resistors are fundamental components in electrical circuits, often manufactured from metallic alloys or carbon compounds. They model a material's ability to resist the flow of electric current, a characteristic that is crucial in controlling and regulating electrical power within a circuit.
This current-resisting behavior of resistors is governed by Ohm's law, which states that the voltage across a resistor is directly proportional to the current flowing through it.
3.0K
Ohm's Law01:21

Ohm's Law

13.2K
Many materials exhibit a simple relationship between the values of current, voltage, and resistance, known as Ohm’s law. The current that flows through most substances is directly proportional to the voltage applied to them. The German physicist Georg Simon Ohm (1787–1854) was the first to demonstrate experimentally that the current in a metal wire is directly proportional to the voltage applied. Any material, component, or device that obeys Ohm’s law, where the current...
13.2K
Semiconductors01:22

Semiconductors

2.0K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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Related Experiment Video

Updated: Apr 17, 2026

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
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Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

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Resistivity saturation in warm dense matter.

Gérald Faussurier1, Christophe Blancard1

  • 1CEA, DAM, DIF, F-91297 Arpajon, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 14, 2015
PubMed
Summary

Electrical resistivity saturates in solid-density aluminum under warm dense matter conditions. Calculations reveal a minimum mean free path near interatomic spacing, impacting conductivity.

Area of Science:

  • Condensed matter physics
  • Plasma physics
  • Materials science

Background:

  • Understanding electrical transport properties is crucial for materials under extreme conditions.
  • The warm dense matter regime bridges the gap between plasma and solid states.
  • Aluminum's behavior at high densities and temperatures is of significant interest.

Purpose of the Study:

  • To investigate the electrical resistivity of solid-density aluminum in the warm dense matter regime.
  • To determine the behavior of the electron mean free path in this regime.
  • To provide theoretical insights into electrical transport in dense plasmas.

Main Methods:

  • Utilizing the Screened-Coulomb Average-Atom Local-Potential (SCAALP) model for average-atom calculations.

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  • Applying the Ziman-Evans formula to compute electrical resistivity at finite temperatures.
  • Estimating the electron mean free path using the Drude model.

    • Main Results:

    • Electrical resistivity was observed to saturate at solid densities.
    • The calculated mean free path exhibited a minimum value.
    • This minimum mean free path was found to be on the order of the interatomic spacing.

    Conclusions:

    • The saturation of electrical resistivity in aluminum under warm dense matter conditions is theoretically demonstrated.
    • The findings suggest that electron scattering is significantly influenced by interatomic distances at these densities.
    • This research contributes to the understanding of electronic properties in extreme states of matter.