scholarly journals Fermi gas energetics in low-dimensional metals of special geometry

2007 ◽  
Vol 25 (4) ◽  
pp. 1270 ◽  
Author(s):  
Avto Tavkhelidze ◽  
Vasiko Svanidze ◽  
Irakli Noselidze
Keyword(s):  
Fermi Gas ◽  
Special Geometry ◽  
Low Dimensional

scholarly journals Thermodynamics of Low-Dimensional Trapped Fermi Gases

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Francisco J. Sevilla
Keyword(s):  
Isothermal Compressibility ◽  
Chemical Potential ◽  
Particle Density ◽  
Fermi Gas ◽  
Fermi Gases ◽  
Nonmonotonic Dependence ◽  
Characteristic Temperatures ◽  
Low Dimensionality ◽  
Thermodynamic Regime ◽  
Low Dimensional

The effects of low dimensionality on the thermodynamics of a Fermi gas trapped by isotropic power-law potentials are analyzed. Particular attention is given to different characteristic temperatures that emerge, at low dimensionality, in the thermodynamic functions of state and in the thermodynamic susceptibilities (isothermal compressibility and specific heat). An energy-entropy argument that physically favors the relevance of one of these characteristic temperatures, namely, the nonvanishing temperature at which the chemical potential reaches the Fermi energy value, is presented. Such an argument allows interpreting the nonmonotonic dependence of the chemical potential on temperature, as an indicator of the appearance of a thermodynamic regime, where the equilibrium states of a trapped Fermi gas are characterized by larger fluctuations in energy and particle density as is revealed in the corresponding thermodynamics susceptibilities.

Chemical potential of the low-dimensional multisubband Fermi gas

2010 ◽  
Vol 22 (46) ◽  
pp. 465304 ◽  
Author(s):  
Elena S Sokolova ◽  
Sviatoslav S Sokolov ◽  
Nelson Studart
Keyword(s):  
Chemical Potential ◽  
Fermi Gas ◽  
Low Dimensional

scholarly journals An Effect of the Space Dimension of Electron Fermi Gas upon the Spin Ordering in Clusters and Nanoparticles

Chemosensors ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 15
Author(s):  
Elena Orlenko ◽  
Fedor Orlenko
Keyword(s):  
Space Dimension ◽  
Fermi Gas ◽  
Spatial Dimension ◽  
Collective Effects ◽  
General Effect ◽  
Potential Wells ◽  
Low Dimensions ◽  
Spin Ordering ◽  
Arbitrary Space ◽  
Low Dimensional

Herein, the collective effects of spin polarization in a degenerate electron gas of an arbitrary space dimension are discussed. We consider these low-dimensional systems in light of potential wells (rectangular or cylindrical), and as a two- or one-dimensional oscillator system with the second (and third) spatial dimension proportional to the oscillator’s length. The concept of “intermediate” sizes ν = 6, 5, 4 corresponding to the quasi-low dimensions ν* = 0, 1, 2, contrary to “pure” space dimensions ν = 1, 2 is introduced. A general effect of the space dimension upon the spontaneous polarization in electron Fermi gas is detected.

Thermoelectric Properties of PbSr(Se,Te)-Based Low Dimensional Structures

2000 ◽  
Vol 626 ◽  
Author(s):  
Harald Beyer ◽  
Joachim Nurnus ◽  
Harald Böttner ◽  
Armin Lambrecht ◽  
Lothar Schmitt ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Power Factor ◽  
Evaluation Method ◽  
Interband Transition ◽  
Multiple Quantum Well ◽  
Calculated Data ◽  
Multiple Quantum ◽  
Ir Transmission ◽  
Low Dimensional

ABSTRACTThermoelectric properties of low dimensional structures based on PbTe/PbSrTe-multiple quantum-well (MQW)-structures with regard to the structural dimensions, doping profiles and levels are presented. Interband transition energies and barrier band-gap are determined from IR-transmission spectra and compared with Kronig-Penney calculations. The influence of the data evaluation method to obtain the 2D power factor will be discussed. The thermoelectrical data of our layers show a more modest enhancement in the power factor σS2 compared with former publications and are in good agreement with calculated data from Broido et al. [5]. The maximum allowed doping level for modulation doped MQW structures is determined. Thermal conductivity measurements show that a ZT enhancement can be achieved by reducing the thermal conductivity due to interface scattering. Additionally promising lead chalcogenide based superlattices for an increased 3D figure of merit are presented.

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