Fermionic random transverse-field Ising spin chain

Abstract

The interplay of spin and charge fluctuations in the random transverse-field Ising spin chain on the fermionic space is investigated. The finite chemical potential, which controls the charge fluctuations, leads to the appearance of the quantum critical region in the phase diagram where the magnetic correlations are quenched by nonmagnetic sites. Regions of nonmonotonous temperature dependence of spin-spin correlation length appear at nonzero $\mu$. The results on the one-fermion density of states of the model are discussed.

10 pages, 2 figures included, citation corrected

References in corpus (6)

• Gapless Spin-Fluid Ground State in a Random Quantum Heisenberg Magnet
• A Numerical Study of the Random Transverse-Field Ising Spin Chain
• Non Fermi Liquid Behaviour near a $T=0$ spin-glass transition
• Landau theory of quantum spin glasses of rotors and Ising spins
• A Solvable Spin-Glass of Quantum Rotors
• Tricritical behaviour of Ising spin glasses with charge fluctuations