Pith Number

pith:UKBN4U3E

pith:2026:UKBN4U3EWFO6EFVDWCMHMMZAUP

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Quantum Geometry-Driven Nonlinear Spin Currents in Floquet Non-Hermitian Altermagnets

Jie Zhu, Kai Chen

In Floquet non-Hermitian d-wave altermagnets the nonlinear spin conductivity is overwhelmingly dominated by the bare quantum metric.

arxiv:2605.15541 v1 · 2026-05-15 · cond-mat.mes-hall · cond-mat.mtrl-sci

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Claims

C1strongest claim

Applying this formalism to a Floquet non-Hermitian d-wave altermagnet, we uncover that the nonlinear spin conductivity is overwhelmingly dominated by the bare quantum metric.

C2weakest assumption

The derivation assumes a non-Hermitian phase possessing a spectral line gap; if the gap closes or becomes a point gap, the clean separation into quantum metric, Berry curvature and Berry connection dipole terms no longer holds and the dominance claim is invalidated (abstract, paragraph on general analytical expression).

C3one line summary

Nonlinear spin conductivity in Floquet non-Hermitian d-wave altermagnets separates into quantum-metric, Berry-curvature and dipole terms and is dominated by the bare quantum metric, with polarization reversing both longitudinal and transverse currents.

References

59 extracted · 59 resolved · 1 Pith anchors

[1] C. M. Bender, Reports on Progress in Physics70, 947 (2007) 2007

[2] Y. Ashida, Z. Gong, and M. Ueda, Advances in Physics 69, 249 (2020) 2020

[3] E. J. Bergholtz, J. C. Budich, and F. K. Kunst, Reviews of Modern Physics93, 015005 (2021) 2021

[4] N. Okuma, K. Kawabata, K. Shiozaki, and M. Sato, Phys- ical review letters124, 086801 (2020) 2020

[5] K. Zhang, Z. Yang, and C. Fang, Nature communications 13, 2496 (2022) 2022

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Receipt and verification

First computed	2026-05-20T00:01:04.336294Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a282de5364b15de216a3b098763320a3d0c90f257784529fcbb6bb0ec87cbcb4

Aliases

arxiv: 2605.15541 · arxiv_version: 2605.15541v1 · doi: 10.48550/arxiv.2605.15541 · pith_short_12: UKBN4U3EWFO6 · pith_short_16: UKBN4U3EWFO6EFVD · pith_short_8: UKBN4U3E

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UKBN4U3EWFO6EFVDWCMHMMZAUP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a282de5364b15de216a3b098763320a3d0c90f257784529fcbb6bb0ec87cbcb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ff06d8a9ea0e701755a19efa6ad722ecaab30114939a476a536d1949aabe1c2",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2026-05-15T02:26:10Z",
    "title_canon_sha256": "9c4e0338e07cdccb190b1dd573074b92cf495f196bc2c92ed43b70f4d6134919"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.15541",
    "kind": "arxiv",
    "version": 1
  }
}