Pith Number

pith:RB7XMTHH

pith:2026:RB7XMTHHD7JKHPJ5IIESZUQBDD

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Microscopic Theory of Chiral-Phonon-Induced Orbital Selectivity in Helical Crystals

Akihito Kato, Alexander S. Ovchinnikov, Jun-ichiro Kishine, Tomomi Tateishi

Chiral phonons in helical crystals transfer angular momentum to electron orbitals via crystal angular momentum conservation.

arxiv:2604.25328 v2 · 2026-04-28 · cond-mat.other

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Claims

C1strongest claim

phonon-induced local rotations generate a rotational electron-phonon interaction proportional to L̂±, which drives the orbital transfer m_ℓ→m_ℓ−m_s in accordance with crystal angular momentum (CAM) conservation, where m_s=±1 denotes the eigenvalue of the phonon rotational mode. Evaluating ⟨L̂^z⟩ to leading order in perturbation theory, we find that the orbital response is suppressed near the Γ point and the BZ boundary, and enhanced at intermediate wave vectors -- a feature intimately tied to the degeneracy structure of the phonon bands.

C2weakest assumption

The assumption that the rotational electron-phonon interaction is strictly proportional to L̂± and that leading-order perturbation theory suffices to capture the orbital response without higher-order corrections or strong-coupling effects, particularly given the reliance on line-group symmetry L3_1 for the threefold helical crystal.

C3one line summary

Chiral phonons in L3_1 helical crystals generate rotational electron-phonon interactions that drive orbital angular momentum transfer m_ℓ to m_ℓ - m_s, with the response suppressed at Γ and zone boundary but enhanced at intermediate wavevectors due to phonon band degeneracies.

References

35 extracted · 2 resolved · 1 Pith anchors

[1] V . S. V onsovskii and M. S. Svirskii, Sov. Phys. Solid State 3, 1568 (1962) 1962

[2] L. Zhang and Q. Niu, Phys. Rev. Lett. 112, 085503 (2014) 2014

[3] L. Zhang and Q. Niu, Phys. Rev. Lett. 115, 115502 (2015) 2015

[4] D. M. Juraschek, R. M. Geilhufe, H. Zhu, M. Basini, P . Baum, A. Bay- din, S. Chaudhary, M. Fechner, B. Flebus, G. Grissonnanche, A. I. Kirilyuk, M. Lemeshko, S. F. Maehrlein, M. Mignolet, S. Mura kam 2025

[5] M. Hamada, E. Minamitani, M. Hirayama, and S. Murakami, Ph ys. Rev. Lett. 121, 175301 (2018) 2018

Receipt and verification

First computed	2026-05-22T01:04:03.355532Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

887f764ce71fd2a3bd3d42092cd20118f2dcca478df8f751b79e7246b1674104

Aliases

arxiv: 2604.25328 · arxiv_version: 2604.25328v2 · doi: 10.48550/arxiv.2604.25328 · pith_short_12: RB7XMTHHD7JK · pith_short_16: RB7XMTHHD7JKHPJ5 · pith_short_8: RB7XMTHH

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/RB7XMTHHD7JKHPJ5IIESZUQBDD \
  | 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: 887f764ce71fd2a3bd3d42092cd20118f2dcca478df8f751b79e7246b1674104

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb04fa6992fce1105bc4c0e785c011a81a7d0f3fa39829787935b64a833e8869",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.other",
    "submitted_at": "2026-04-28T07:44:22Z",
    "title_canon_sha256": "8b9ff91a9689c295857668fc38aa90b1e40511f71aa9053ed7c6186c099b8982"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.25328",
    "kind": "arxiv",
    "version": 2
  }
}