scholarly journals Chemical potential-functional-theory about the properties of one-dimensional Hubbard model at finite temperature

2017 ◽  
Vol 66 (12) ◽  
pp. 126701
Author(s):  
Lu Zhan-Peng ◽  
Wei Xing-Bo ◽  
Liu Tian-Shuai ◽  
Chen A-Hai ◽  
Gao Xian-Long
Keyword(s):  
Hubbard Model ◽  
Finite Temperature ◽  
Chemical Potential ◽  
Functional Theory ◽  
One Dimensional ◽  
Potential Functional Theory

scholarly journals Exact Ground-State Properties and Phase Transitions within One-dimensional Hubbard Model in Magnetic Field

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3771-3776
Author(s):  
C. Yang ◽  
A. N. Kocharian ◽  
Y. L. Chiang
Keyword(s):  
Magnetic Field ◽  
Hubbard Model ◽  
Ground State ◽  
Chemical Potential ◽  
Interaction Strength ◽  
Upper And Lower Bounds ◽  
One Dimensional ◽  
Ground State Properties ◽  
Half Filling ◽  
The One

The phase diagram, the Bethe-ansatz ground-state properties, including the chemical potential μ, the spin (magnetic) and charge susceptibilities, are calculated within the one-dimensional Hubbard model in entire range of interaction strength (-∞< U/t<+∞), magnetic field (h≥ 0) and all electron concentrations (0≤n≤1). The continuous and smooth variation of μ with n and h in the vicinity of n=1 points on the gapless character of charge excitations at U<0 and provides rigorous upper and lower bounds for μ. The spin (magnetic) susceptability χ at half-filling changes discontinuously as U→0 and is strongly enhanced by electron repulsion, comparing with that of the non-interactig case. The compressibility κ ch increases with n at U<0 and shows non-monotonous behavior with a dramatic increase at U>0. Variations of κ ch -1 in both repulsive and attractive cases qualitatively well reproduces corresponding behavior of charge stiffness.

scholarly journals Finite-temperature charge transport in the one-dimensional Hubbard model

2015 ◽  
Vol 92 (20) ◽  
Author(s):  
F. Jin ◽  
R. Steinigeweg ◽  
F. Heidrich-Meisner ◽  
K. Michielsen ◽  
H. De Raedt
Keyword(s):  
Hubbard Model ◽  
Charge Transport ◽  
Finite Temperature ◽  
One Dimensional ◽  
The One
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