ISO 80000-12:2019

Overview

ISO 80000-12:2019, titled Quantities and units - Part 12: Condensed matter physics, is an internationally recognized standard developed by IEC and ISO. It provides a comprehensive framework for naming, symbolizing, defining, and quantifying physical quantities specifically used in condensed matter physics. The standard ensures uniformity and clarity in scientific communication by specifying the units to be used for various phenomena and properties related to condensed matter systems. Additionally, it includes conversion factors when necessary to facilitate practical application and interoperability across different regions and disciplines.

This standard is vital for researchers, engineers, educators, and industry professionals dealing with crystallography, solid-state physics, material science, and related fields. By standardizing these fundamental quantities and units, ISO 80000-12:2019 helps improve consistency and reduces ambiguity in technical documentation and experimental reporting.

Key Topics

ISO 80000-12:2019 covers an extensive range of condensed matter physics quantities, including but not limited to:

• Lattice Geometry: Defines lattice vectors, fundamental lattice vectors, and reciprocal lattice vectors, crucial for describing crystal structures and their symmetry.
• Diffraction Parameters: Includes terms such as lattice plane spacing, Bragg angle, and structure factors, which are essential in the analysis of X-ray and neutron diffraction experiments.
• Order Parameters: Short-range and long-range order parameters important for characterizing magnetic and other phase transitions in materials.
• Atomic and Electron Scattering: Defines atomic scattering factors and structure factors, key quantities in interpreting scattering experiments.
• Dislocations and Defects: Burgers vector, which quantifies the magnitude and direction of dislocation lines in crystals.
• Phonon and Electron Dynamics: Angular wavenumber, Debye angular frequency, Debye temperature, and vibration density of states, relevant for thermal and electrical transport studies.
• Thermoelectric Effects: Seebeck coefficient, Peltier coefficient, and Thomson coefficient that describe thermoelectric phenomena in solids.
• Electrical and Thermal Properties: Residual resistivity, Lorenz coefficient, and Hall coefficient, fundamental for electronic materials characterization.
• Energy Levels and Transitions: Work function, ionization energy, electron affinity, Fermi energy, and gap energy, which describe electronic structure and band properties.

Each quantity is accompanied by its symbol, precise definition, and the recommended unit, predominantly using SI units with notes on commonly used non-SI units (e.g., ångström).

Applications

ISO 80000-12:2019 is extensively applicable in several practical and scientific fields, including:

• Materials Science and Engineering: Standardized terminology and units help characterize and engineer materials such as semiconductors, metals, and insulators.
• Crystallography: The definitions of lattice vectors, plane spacing, and scattering factors support X-ray and neutron diffraction studies for structure determination.
• Solid-State Physics Research: Provides consistent foundation for describing phonons, electron behavior, and magnetic order in solids.
• Electronics and Semiconductor Industry: Facilitates design and analysis of electronic devices by standardizing parameters like electron density, Fermi energy, and thermoelectric coefficients.
• Nanotechnology: Assists in describing nanoscale phenomena where condensed matter properties dominate.
• Thermoelectric Device Development: Quantification of thermoelectric voltage and heat effects supports innovation in energy conversion technologies.

By adopting this standard, organizations can ensure that their measurement, design, and research activities align globally with accepted scientific norms, enhancing collaboration and innovation across borders.

Related Standards

ISO 80000-12:2019 is part of the broader ISO/IEC 80000 series, which covers quantities and units across various scientific and engineering domains. Related standards include:

• ISO 80000-1: General principles and definitions for quantities and units.
• ISO 80000-2: Mathematical signs and symbols for quantities.
• ISO 80000-3: Space and time quantities relevant to material structure.
• ISO 80000-4: Mechanics quantities including momentum and force.
• ISO 80000-5: Thermodynamics quantities covering temperature, energy, and heat.
• IEC 80000-6: Electrical quantities important for electrotechnical systems.

These interconnected parts provide a comprehensive glossary and framework to uniformly represent units and physical quantities, strengthening consistency across disciplines like physics, engineering, and applied sciences.

Key Keywords: condensed matter physics standard, ISO 80000-12, physical quantities units, lattice vectors, diffraction parameters, thermoelectric coefficients, Fermi energy, crystal structure units, material science standards, electrical and thermal properties, standardized physics terminology.