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Article overview
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Strongly Interacting Phases of Metallic Wires in Strong Magnetic Field | Daniel Bulmash
; Chao-Ming Jian
; Xiao-Liang Qi
; | Date: |
27 Feb 2017 | Abstract: | We investigate theoretically an interacting metallic wire with a strong
magnetic field directed along its length and show that it is a new and highly
tunable one-dimensional system. By considering a suitable change in spatial
geometry, we map the problem in the zeroth Landau level with Landau level
degeneracy $N$ to one-dimensional fermions with an $N$-component pseudospin
degree of freedom and $SU(2)$-symmetric interactions. This mapping allows us to
establish the phase diagram as a function of the interactions for small $N$
(and make conjectures for large $N$) using renormalization group and
bosonization techniques. We find pseudospin-charge separation with a gapless
$U(1)$ charge sector and several possible strong-coupling phases in the
pseudospin sector. For odd $N$, we find a fluctuating pseudospin-singlet charge
density wave phase and a fluctuating pseudospin-singlet superconducting phase
which are topologically distinct. For even $N>2$, similar phases exist,
although they are not topologically distinct, and an additional, novel
pseudospin-gapless phase appears. We discuss experimental conditions for
observing our proposals. | Source: | arXiv, 1702.8528 | Services: | Forum | Review | PDF | Favorites |
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