Ground state of a mobile vacancy in a quantum antiferromagnet: Small-cluster study

1990 ◽  
Vol 41 (10) ◽  
pp. 6715-6723 ◽  
Author(s):  
Veit Elser ◽  
David A. Huse ◽  
Boris I. Shraiman ◽  
Eric D. Siggia
Keyword(s):  
Ground State ◽  
Small Cluster ◽  
Quantum Antiferromagnet ◽  
Mobile Vacancy

QUANTUM DISORDER OF AN ANTIFERROMAGNETIC SPIN MODEL ON THE SIERPIŃSKI GASKET

2003 ◽  
Vol 17 (28) ◽  
pp. 5059-5063
Author(s):  
ANDREAS VOIGT ◽  
JOHANNES RICHTER
Keyword(s):  
Ground State ◽  
Magnetic Order ◽  
Spin Exchange ◽  
Sierpinski Gasket ◽  
Spin Model ◽  
Sierpiński Gasket ◽  
Spin Correlations ◽  
Quantum Antiferromagnet ◽  
Antiferromagnetic Spin ◽  
Exact Diagonalisation

We study the ground state magnetic order of the quantum antiferromagnet on the fractal Sierpiński gasket, a system with a dimension between one and two. Using exact diagonalisation we analyse the ground state and thermodynamic properties of small finite systems and calculate data like spin-spin correlations and specific heat. We find arguments that the ground state remains disordered for an XY or Ising like anisotropy in the spin exchange away from the isotropic Heisenberg point.

Mobile vacancy in a quantum antiferromagnet: Effective Hamiltonian

1990 ◽  
Vol 42 (4) ◽  
pp. 2485-2500 ◽  
Author(s):  
Boris I. Shraiman ◽  
Eric D. Siggia
Keyword(s):  
Effective Hamiltonian ◽  
Quantum Antiferromagnet ◽  
Mobile Vacancy

THE SPINLESS FALICOV–KIMBALL MODEL AWAY FROM HALF-FILLING

1999 ◽  
Vol 13 (15) ◽  
pp. 515-522 ◽  
Author(s):  
ŠTEFAN GÁL
Keyword(s):  
Strong Coupling ◽  
Ground State ◽  
Low Temperatures ◽  
Exact Diagonalization ◽  
Strong Coupling Limit ◽  
Small Cluster ◽  
One Dimensional ◽  
Small Band ◽  
Half Filling ◽  
The One

The one-dimensional spinless Falicov–Kimball (FKM) model is studied in the strong coupling limit away from half-filling. The small-cluster exact-diagonalization calculations are employed to obtain valence transitions in the ground state and for finite temperatures. It is found that in the ground state, the model describes continuous valence transitions for small band-fillings and both continuous and discontinuous transitions near half-filling. At finite temperatures, only continuous valence transitions are obtained. The valence is integer at low temperatures for small band-fillings and in other cases, it takes only intermediate values.

scholarly journals Observation of new magnetic ground state in frustrated quantum antiferromagnet spin-liquid system Cs2CuCl4

2017 ◽  
Vol 43 (8) ◽  
pp. 901-904 ◽  
Author(s):  
Hyeong-Jin Kim ◽  
C. R. S. Haines ◽  
C. Liu ◽  
Sae Hwan Chun ◽  
Kee Hoon Kim ◽  
...  
Keyword(s):  
Ground State ◽  
Liquid System ◽  
Spin Liquid ◽  
Magnetic Ground State ◽  
Quantum Antiferromagnet

scholarly journals Two-dimensional quantum antiferromagnet with a fourfold degenerate dimer ground state

2008 ◽  
Vol 77 (1) ◽  
Author(s):  
Alain Gellé ◽  
Andreas M. Läuchli ◽  
Brijesh Kumar ◽  
Frédéric Mila
Keyword(s):  
Ground State ◽  
Two Dimensional ◽  
Quantum Antiferromagnet
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