Quantum disordered phase in a doped antiferromagnet
C. Kuebert, A. Muramatsu (Institut fuer theoretische Physik der, Universitaet Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany)
TL;DR
This paper models the transition to a quantum disordered phase in a doped antiferromagnet using a U(1) gauge-theory, revealing how gauge fields influence spin-wave gaps and mediate interactions leading to charge-spin separation and pairing.
Contribution
It introduces a quantitative gauge-theory framework to describe the quantum disordered phase transition in doped antiferromagnets, highlighting the role of gauge fields in mediating interactions.
Findings
Gauge fields mediate attractive long-range interactions.
Spin-wave spectrum gap determines gauge-field strength.
Possible bound-states indicate charge-spin separation and pairing.
Abstract
A quantitative description of the transition to a quantum disordered phase in a doped antiferromagnet is obtained with a U(1) gauge-theory, where the gap in the spin-wave spectrum determines the strength of the gauge-fields. They mediate an attractive long-range interaction whose possible bound-states correspond to charge-spin separation and pairing.
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