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  2. Potts model - Wikipedia

    en.wikipedia.org/wiki/Potts_model

    that is, the set of all possible strings where k+1 spins match up exactly to a given, specific set of values ξ 0, ..., ξ k. Explicit representations for the cylinder sets can be gotten by noting that the string of values corresponds to a q -adic number , however the natural topology of the q-adic numbers is finer than the above product topology.

  3. Spin network - Wikipedia

    en.wikipedia.org/wiki/Spin_network

    Spin network diagram, after Penrose. In physics, a spin network is a type of diagram which can be used to represent states and interactions between particles and fields in quantum mechanics. From a mathematical perspective, the diagrams are a concise way to represent multilinear functions and functions between representations of matrix groups ...

  4. Spin structure - Wikipedia

    en.wikipedia.org/wiki/Spin_structure

    When a manifold carries a spin C structure at all, the set of spin C structures forms an affine space. Moreover, the set of spin C structures has a free transitive action of H 2 (M, Z). Thus, spin C-structures correspond to elements of H 2 (M, Z) although not in a natural way.

  5. Spin states (d electrons) - Wikipedia

    en.wikipedia.org/wiki/Spin_states_(d_electrons)

    Low-spin [Fe(NO 2) 6] 3− crystal field diagram. The Δ splitting of the d orbitals plays an important role in the electron spin state of a coordination complex. Three factors affect Δ: the period (row in periodic table) of the metal ion, the charge of the metal ion, and the field strength of the complex's ligands as described by the spectrochemical series.

  6. Solid solution - Wikipedia

    en.wikipedia.org/wiki/Solid_solution

    a solid solution mixes with others to form a new solution The phase diagram in the above diagram displays an alloy of two metals which forms a solid solution at all relative concentrations of the two species. In this case, the pure phase of each element is of the same crystal structure, and the similar properties of the two elements allow for ...

  7. Spin crossover - Wikipedia

    en.wikipedia.org/wiki/Spin_crossover

    Spin crossover is sometimes referred to as spin transition or spin equilibrium behavior. The change in spin state usually involves interchange of low spin (LS) and high spin (HS) configuration. [2] Spin crossover is commonly observed with first row transition metal complexes with a d 4 through d 7 electron configuration in an octahedral ligand ...

  8. Spin representation - Wikipedia

    en.wikipedia.org/wiki/Spin_representation

    Spin representations can be analysed according to the following strategy: if S is a real spin representation of Spin(p, q), then its complexification is a complex spin representation of Spin(p, q); as a representation of so(p, q), it therefore extends to a complex representation of so(n, C).

  9. Jordan–Wigner transformation - Wikipedia

    en.wikipedia.org/wiki/Jordan–Wigner_transformation

    The Jordan–Wigner transformation is a transformation that maps spin operators onto fermionic creation and annihilation operators.It was proposed by Pascual Jordan and Eugene Wigner [1] for one-dimensional lattice models, but now two-dimensional analogues of the transformation have also been created.