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Condensed Matter & Materials Physics

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Condensed Matter & Materials Physics

Seebeck Effect

The direct conversion of a temperature gradient into an electrical voltage across a conductor or semiconductor.

V = S ΔT = S (T_hot - T_cold) μV/K (Seebeck Coefficient S)
Condensed Matter & Materials Physics

Semiconductor

A class of crystalline solids possessing electrical conductivity between that of conductors and insulators, controllable by temperature…

σ = e (n μ_e + p μ_h), n_i = √(N_c N_v) e^(-E_g / (2 k_B T)) S/m (Electrical Conductivity)
Condensed Matter & Materials Physics

Shape Memory Alloys

A class of smart metallic alloys that can be deformed when cold, but return to their original pre-deformed shape when heated above a…

Reversible Austenite (High T) ↔ Martensite (Low T) Phase Shift % (Recoverable Superelastic Strain)
Condensed Matter & Materials Physics

Spin Glass

A disordered magnetic state characterized by random, competing ferromagnetic and antiferromagnetic interactions that freeze atomic spins…

Frustrated Exchange Interaction J_ij Disordered Magnetic Phase
Condensed Matter & Materials Physics

Superalloys

High-performance metallic alloys engineered to maintain exceptional mechanical strength, creep resistance, and oxidation resistance at high…

γ' Phase Precipitation: Ni₃(Al, Ti) High Temperature Strength (MPa at >800 °C)
Condensed Matter & Materials Physics

Superconductivity

A macroscopic quantum state of matter where certain materials exhibit exactly zero electrical DC resistance and complete expulsion of…

R = 0 (for T < T_c), B = 0 (Meissner expulsion) K (Critical Temperature T_c)
Condensed Matter & Materials Physics

Superfluidity

A macroscopic quantum state of matter where a fluid flows with exactly zero viscosity and zero kinetic entropy.

Viscosity η = 0 (Below Lambda point T_λ = 2.17 K) K (Lambda Transition Temperature)
Condensed Matter & Materials Physics

Surface Energy

The excess thermodynamic energy at the surface of a material relative to its interior bulk, caused by disrupted, incomplete atomic bonds.

γ = dW / dA J/m² or N/m