Evidence map›Paper›PMID 41538411›Full record

ArticleScience (New York, N.Y.)2026

Metallic θ-phase tantalum nitride has a thermal conductivity triple that of copper.

Suixuan Li, Chuanjin Su, Zihao Qin, Ahmet Alatas, Martin Kunz, Takahiro Yamada, Shelly D Kelly, Mary H Upton, Anthony Gironda, Jiyong Zhao and 4 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Science (New York, N.Y.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Review
  2. Halide Perovskite: A Rich Source of Thermal Insulator.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors.

Suixuan Li *Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA.ORCID 0000-0003-3242-4185
Chuanjin Su *Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA.ORCID 0000-0002-0301-8068
Zihao Qin *Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
Ahmet AlatasAdvanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
Martin KunzAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Takahiro YamadaInstitute of Multidisciplinary Research for Advanced Material, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan.
Shelly D KellyAdvanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
Mary H UptonAdvanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
Anthony GirondaAdvanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
Jiyong ZhaoAdvanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
Bora KalkanAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Wanli YangAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Toshihiro AokiIrvine Materials Research Institute, Irvine, CA, USA.
Yongjie HuDepartment of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, USA.ORCID 0000-0001-7225-1130

Funding

Nanoscale Temperature Mapping and Thermal Regulation of Intracellular DynamicsR35GM147391 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI Yongjie Hu · 2022 to 2026
$2.2M
NIGMS NIH HHS R35 GM147391
6 · The paper itself

Abstract

Efficient heat dissipation is fundamentally limited by intrinsic scattering mechanisms that cap the thermal conductivity of metallic materials such as copper to ~400 watts per meter-kelvin. Here we report the experimental realization of single-crystalline θ-phase tantalum nitride (θ-TaN), a metastable transition metal nitride predicted to overcome this limitation. We measured a room-temperature thermal conductivity of ~1100 watts per meter-kelvin, nearly three times that of copper. Synchrotron-based inelastic x-ray scattering revealed a distinctive phonon band structure with a large acoustic-optical gap and phonon bunching, which suppress phonon-phonon scattering. Ultrafast optical spectroscopy confirmed exceptionally weak electron-phonon coupling and validated first-principles calculations. These findings redefine the thermal transport limits of metallic materials and open new opportunities for advancing thermal management in electronics and power systems.

Identifiers

PMID41538411
PMCPMC13371953

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.