Condensed Matter Physics

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8 domain-specific abstractions whose origin domain is Condensed Matter Physics.

• BCS theory — Model conventional superconductivity microscopically by an effective attraction that pairs fermions near the Fermi surface into a phase-coherent many-body state with a self-consistent excitation gap, while separating the original weak-coupling isotropic theory from justified extensions.
• Cophonicity — A vibrational-overlap metric measuring how strongly two atomic species contribute together within a selected frequency range.
• Nernst Effect — Measure the ordinary off-diagonal thermoelectric response in which a longitudinal temperature gradient and perpendicular applied magnetic field generate a transverse open-circuit electric field, while keeping the response geometry distinct from its several microscopic mechanisms.
• Phase space crystal — A state exhibiting discrete translational or rotational order in phase space rather than ordinary real-space position.
• Second sound — Wave-like propagation of temperature or entropy disturbances in a material where heat transport becomes hydrodynamic rather than diffusive.
• Soft matter — Characterize materials whose mesoscopic organization and weak interactions make thermal fluctuations, entropy, interfaces, and small mechanical stresses comparable to the energies that reorganize structure and response.
• Topological superconductor — A superconducting phase with a nontrivial bulk topological invariant and protected boundary or defect excitations.
• Zak phase — The Berry phase accumulated by a Bloch band along a closed noncontractible loop through the Brillouin zone.