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arXiv:1005.3905 · Physical Review B

Magnetic resonance within vortex cores in the B phase of superfluid H3e

Ivan M. Khaymovich, М. А. Силаев

Published Sep 8, 2010• 2 citations
arXivHTMLPDF

Abstract

We investigate a magnetic susceptibility of vortices in the B phase of multicomponent triplet superfluid $^{3}\text{H}\text{e}$ focusing on a contribution of bound fermionic states localized within vortex cores. Several order-parameter configurations relevant to different types of quantized vortices in $^{3}\text{H}\text{e}$ B are considered. It is shown quite generally that an ac magnetic susceptibility has a sharp peak at the frequency corresponding to the energy of interlevel spacing in the spectrum of bound fermions. We suggest that measuring of a magnetic resonance within vortex cores can provide a direct probe of a discrete spectrum of bound vortex-core excitations.

DOI
10.1103/physrevb.82.094507

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Triple-Core Structure of the Double-Core Vortex in Superfluid 3^33He-B
Abstract The order parameter of superfluid 3^33 3 He involves nine complex components, and the multicomponent structure allows quantized vortices in superfluid 3^33 3 He to have complicated cores. One of the vortices found in the B phase is the double-core vortex, which has been often described as a pair of two half-quantum vortices (HQVs) connected by a domain wall. Our numerical calculations of the core structure suggest an alternative representation of the vortex as a combination of three vortices, one in each component of the spin-triplet superfluid. Based on the results we present a qualitative analytical model for the triple-core structure of the double-core vortex. Additionally we numerically calculate the structure of a double-core vortex stretched between pinning sites, and show that the HQV picture becomes more applicable when separation between subcores becomes large.
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