Pith Number

pith:TV6SOOV5

pith:2026:TV6SOOV5V3MCKIGVNNLPJULSME

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The thermopower properties of interacting systems

M. A. Habitzreuter, Natanael C. Costa, Rodrigo A. Fontenele, Thereza Paiva, Willdauany C. de Freitas da Silva

Additional interactions beyond on-site repulsion enhance the Seebeck coefficient and produce multiple anomalous sign changes with doping.

arxiv:2605.14225 v1 · 2026-05-14 · cond-mat.str-el

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Claims

C1strongest claim

We find that additional interaction scales can enhance the Seebeck coefficient, while also leading to multiple anomalous changes of sign as a function of doping. We connect these changes of sign in the Seebeck coefficient with a restructuring of the Fermi surface and a change in its topology.

C2weakest assumption

The numerical or analytic method used to compute the Seebeck coefficient from the extended interacting Hamiltonians accurately captures the low-energy physics without uncontrolled approximations or finite-size artifacts.

C3one line summary

Additional interaction terms enhance the Seebeck coefficient and produce multiple doping-dependent sign changes tied to gap opening and Fermi-surface topology changes.

References

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[1] Around half-filling We now discuss the effects of near-neighbor interac- tions on the thermoelectric properties. To this end, we examine the extended Hubbard model (EHM) [32, 44], which describes ferm

[2] 3 and 4 show an additional sign change of the Seebeck coefficient near quarter-filling, which is robust forT /t≲1

[3] Since the con- nection between density plateaus and entropy peaks was already highlighted in the previous Hamiltonians, here we show only the Seebeck coefficient in Figure 9

[4] Around quarter-filling We now turn our attention to the quarter-filling regime, in which the ground state is less clear. Figure 9 (a) shows that, as ∆ increases for fixedU/t= 10, the Seebeck response 2023

[5] D. M. Rowe,Thermoelectrics handbook: macro to nano (CRC press, 2005) 2005

Receipt and verification

First computed	2026-05-17T23:39:10.787723Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d7d273abdaed82520d56b56f4d1726117512a558d1e7e2d8b4669d071746a0d

Aliases

arxiv: 2605.14225 · arxiv_version: 2605.14225v1 · doi: 10.48550/arxiv.2605.14225 · pith_short_12: TV6SOOV5V3MC · pith_short_16: TV6SOOV5V3MCKIGV · pith_short_8: TV6SOOV5

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TV6SOOV5V3MCKIGVNNLPJULSME \
  | 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: 9d7d273abdaed82520d56b56f4d1726117512a558d1e7e2d8b4669d071746a0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2bc533b1cf5269b0102c8407c21a053c46ab65f3618dc70cb71c90dc16e689a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cond-mat.str-el",
    "submitted_at": "2026-05-14T00:41:54Z",
    "title_canon_sha256": "471ef49e83b683345f92f4676a5f7a34c1d76bfedff60c82becd246ec90235cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14225",
    "kind": "arxiv",
    "version": 1
  }
}