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In condensed matter physics, the Fermi surface is the surface in reciprocal space which separates occupied electron states from unoccupied electron states at zero temperature. [1] The shape of the Fermi surface is derived from the periodicity and symmetry of the crystalline lattice and from the occupation of electronic energy bands.
Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter, especially the solid and liquid phases, that arise from electromagnetic forces between atoms and electrons. More generally, the subject deals with condensed phases of matter: systems of many constituents with strong ...
In condensed matter physics, quantum oscillations describes a series of related experimental techniques used to map the Fermi surface of a metal in the presence of a strong magnetic field. [1] These techniques are based on the principle of Landau quantization of Fermions moving in a magnetic field. [2]
Luttinger's theorem states that the volume enclosed by a material's Fermi surface is directly proportional to the particle density.. While the theorem is an immediate result of the Pauli exclusion principle in the case of noninteracting particles, it remains true even as interactions between particles are taken into consideration provided that the appropriate definitions of Fermi surface and ...
The general definition of Dirac matter is a condensed matter system ... experimentally observable feature of Weyl semimetals is that the surface states form Fermi ...
The electrons near the Fermi surface couple strongly with the phonons of 'nesting' wave number Q = 2k F. The 2 k F mode thus becomes softened as a result of the electron-phonon interaction. [ 6 ] The 2 k F phonon mode frequency decreases with decreasing temperature, and finally goes to zero at the Peierls transition temperature.
When 21.22 eV photons are used, the Fermi level is imaged at 16.64 eV. Angle-resolved photoemission spectroscopy (ARPES) is an experimental technique used in condensed matter physics to probe the allowed energies and momenta of the electrons in a material, usually a crystalline solid.
Phase diagram for a doped cuprate superconductor showing the pseudogap phase. In condensed matter physics, a pseudogap describes a state where the Fermi surface of a material possesses a partial energy gap, for example, a band structure state where the Fermi surface is gapped only at certain points.