Magnetic Susceptibility of Andreev Bound States in Superfluid He 3 - B

J. W. Scott; M. D. Nguyen; D. Park; W. P. Halperin

doi:10.1103/PhysRevLett.131.046001

Magnetic Susceptibility of Andreev Bound States in Superfluid He 3 - B

J. W. Scott, M. D. Nguyen, D. Park, W. P. Halperin

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Nuclear magnetic resonance measurements of the magnetic susceptibility of superfluid He3 imbibed in anisotropic aerogel reveal anomalous behavior at low temperatures. Although the frequency shift clearly identifies a low-temperature phase as the B phase, the magnetic susceptibility does not display the expected decrease associated with the formation of the opposite-spin Cooper pairs. This susceptibility anomaly appears to be the predicted high-field behavior corresponding to the Ising-like magnetic character of surface Andreev bound states within the planar aerogel structures.

Original language	English (US)
Article number	046001
Journal	Physical review letters
Volume	131
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.131.046001
State	Published - Jul 28 2023

Funding

This work was supported by NSF Division of Materials Research Grant No. DMR-2210112. We are grateful to J.\u2009A. Sauls and A.\u2009M. Zimmerman for useful discussion and to V.\u2009P. Mineev for communication. We also thank the Northwestern University Instrument Shop for use of its facilities.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.131.046001

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abstract = "Nuclear magnetic resonance measurements of the magnetic susceptibility of superfluid He3 imbibed in anisotropic aerogel reveal anomalous behavior at low temperatures. Although the frequency shift clearly identifies a low-temperature phase as the B phase, the magnetic susceptibility does not display the expected decrease associated with the formation of the opposite-spin Cooper pairs. This susceptibility anomaly appears to be the predicted high-field behavior corresponding to the Ising-like magnetic character of surface Andreev bound states within the planar aerogel structures.",

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AB - Nuclear magnetic resonance measurements of the magnetic susceptibility of superfluid He3 imbibed in anisotropic aerogel reveal anomalous behavior at low temperatures. Although the frequency shift clearly identifies a low-temperature phase as the B phase, the magnetic susceptibility does not display the expected decrease associated with the formation of the opposite-spin Cooper pairs. This susceptibility anomaly appears to be the predicted high-field behavior corresponding to the Ising-like magnetic character of surface Andreev bound states within the planar aerogel structures.

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Magnetic Susceptibility of Andreev Bound States in Superfluid He 3 - B

Abstract

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