Magnetic localization in the spin-polarized one-dimensional Anderson-Hubbard model

Journal Article · Fri May 01 04:00:00 EDT 2009 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.79.184417· OSTI ID:21287013

Okumura, M; Yamada, S; Machida, M ^[1]; Taniguchi, N ^[2]

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1. CCSE, Japan Atomic Energy Agency, 6-9-3 Higashi-Ueno, Taito-ku, Tokyo 110-0015 (Japan)
2. Institute of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571 (Japan)

In order to study an interplay of disorder, correlation, and spin imbalance on antiferromagnetism, we systematically explore the ground state of one-dimensional spin-imbalanced Anderson-Hubbard model by using the density-matrix renormalization-group method. We find that disorders localize the antiferromagnetic spin-density wave induced by imbalanced fermions and the increase in the disorder magnitude shrinks the areas of the localized antiferromagnetized regions. Moreover, the antiferromagnetism finally disappears above a large disorder. The localization behaviors are observable in atomic Fermi gases loaded on optical lattices as broadening of the momentum distribution of the spin density by using the Stern-Gerlach type of time-of-flight imaging.

• OSTI ID: 21287013
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 18 Vol. 79; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
CORRELATIONS
DENSITY MATRIX
ELECTRONS
FERMI GAS
GROUND STATES
HUBBARD MODEL
MAGNETIZATION
ONE-DIMENSIONAL CALCULATIONS
POLARIZATION
RENORMALIZATION
SPIN
SPIN ORIENTATION
TIME-OF-FLIGHT METHOD