Pith Number

pith:C4LBJY3F

pith:2026:C4LBJY3FNMBLDT6H6RQBPY2SNW

not attested not anchored not stored refs resolved

Negative Differential Resistance and Ultra-High TMR in Altermagnetic Tunnel Junctions

Declan Nell, Luke Keenan, Sajjan Sheoran, Stefano Sanvito

Altermagnetic tunnel junctions with KV2Se2O produce large low-bias negative differential resistance and sign-inverting TMR.

arxiv:2605.12711 v1 · 2026-05-12 · cond-mat.mes-hall · cond-mat.mtrl-sci

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\pithnumber{C4LBJY3FNMBLDT6H6RQBPY2SNW}

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We predict that a large low-bias negative differential resistance can be observed in an altermagnetic tunnel junction... supports a large tunneling magnetoresistance with sign inversion at 0.13 V.

C2weakest assumption

The quasi-2D Fermi surface of KV2Se2O plays a crucial role in realizing the negative differential resistance, and the DFT+NEGF model accurately captures the bias-dependent transport without significant errors from functional choice or interface details.

C3one line summary

Altermagnetic tunnel junctions based on KV2Se2O exhibit low-bias negative differential resistance and sign-inverting ultra-high TMR due to the material's quasi-2D Fermi surface.

References

14 extracted · 14 resolved · 0 Pith anchors

[1] (1) Šmejkal, L.; Sinova, J.; Jungwirth, T.Phys. Rev. X2022,12, 031042. (2) Yuan, L.-D.; Wang, Z.; Luo, J.-W.; Zunger, A.Phys. Rev. Mater.2021,5, 014409. (3) Hayami, S.; Yanagi, Y.; Kusunose, H.Phys. R 2021

[2] (5) Sheoran, S.; Dev, P.Phys. Rev. B2025,111, 184407. (6) González-Hernández, R.; Šmejkal, L.; V` yborn` y, K.; Yahagi, Y.; Sinova, J.; Jungwirth, T.; Železn` y, J. Phys. Rev. Lett.2021,126, 127701. ( 2021

[3] (11) Zhang, X.-P.; Feng, W.; Zhang, R.-W.; Fan, X.; Wang, X.; Yao, Y.Phys. Rev. Lett.2025,135, 266706. (12) Xu, S.; Zhang, Z.; Mahfouzi, F.; Huang, Y.; Cheng, H.; Dai, B.; Kim, J.; Zhu, D.; Cai, W.; S 2025

[4] (13) Noh, S.; Kim, G.-H.; Lee, J.; Jung, H.; Seo, U.; So, G.; Lee, J.; Lee, S.; Park, M.; Yang, S., et al.Phys. Rev. Lett.2025,134, 246703. (14) Halder, A.; Nell, D.; Sihi, A.; Bajaj, A.; Sanvito, S.; 2025

[5] M.; Archer, T.; Rungger, I.; Sanvito, S.Phys 2012

Receipt and verification

First computed	2026-05-18T03:09:49.539617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

171614e3656b02b1cfc7f46017e3526daccbfd935c777df8c41e0e7c4a43188e

Aliases

arxiv: 2605.12711 · arxiv_version: 2605.12711v1 · doi: 10.48550/arxiv.2605.12711 · pith_short_12: C4LBJY3FNMBL · pith_short_16: C4LBJY3FNMBLDT6H · pith_short_8: C4LBJY3F

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/C4LBJY3FNMBLDT6H6RQBPY2SNW \
  | 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: 171614e3656b02b1cfc7f46017e3526daccbfd935c777df8c41e0e7c4a43188e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d612db7fc69f9410555dabafc19e8920a7dbde825436157addb4d3c9c3721280",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2026-05-12T20:19:35Z",
    "title_canon_sha256": "8717e2bad5eb559450b15f2e9f15becc466e6fecf469d8edab15a432b9cdc8cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.12711",
    "kind": "arxiv",
    "version": 1
  }
}