# Anisotropic optical conductivity accompanied by a small energy gap in the one-dimensional thermoelectric telluride <math>  <mrow>    <msub>      <mi>Ta</mi>      <mn>4</mn>    </msub>    <msub>      <mi>SiTe</mi>      <mn>4</mn>    </msub>  </mrow></math>

https://mdr.nims.go.jp/datasets/2716cb2d-6a48-44f2-8030-907a6d835eb2

## File

- [PhysRevB.109.L161105.pdf](https://mdr.nims.go.jp/filesets/4fe2b69b-7fc7-4d1d-a4c6-212ce3d7ff6c/download) ([Detail](https://mdr.nims.go.jp/filesets/4fe2b69b-7fc7-4d1d-a4c6-212ce3d7ff6c.md))

## Id

2716cb2d-6a48-44f2-8030-907a6d835eb2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-04-11T07:49:31.750958Z

## Updated at

2024-04-11T23:30:12.877261Z

## Published at

2024-04-11T23:30:13.295461Z

## Doi



## First published url

https://doi.org/10.1103/physrevb.109.l161105

## Date published

2024-04-08

## Recorded date published

2024-4

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Anisotropic optical conductivity accompanied by a small energy gap in the
    one-dimensional thermoelectric telluride <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi
    mathvariant="normal">Ta</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi>SiTe</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>
  title_type: original
  lang: en

## Description

- description: We investigated the optical properties of single crystals of one-dimensional
    van der Waals crystal Ta4SiTe4, which exhibited high thermoelectric performance
    below room temperature. Optical conductivity estimated from reflectivity spectra
    indicates the presence of a small energy gap of 0.1–0.15 eV at the Fermi energy.
    At the lowest energy, optical conductivity along the Ta4SiTe4 chain is an order
    of magnitude higher than that perpendicular to this direction, reflecting anisotropic
    electron conduction in Ta4SiTe4 . These results suggest that the coexistence of
    a small band gap and moderate anisotropy in electron conduction is a promising
    strategy for developing high-performance thermoelectric materials for low-temperature
    applications.
  description_type: abstract
  lang: und

## Creator

- name: Fumiya Matsunaga
  role: author
- name: Yoshihiko Okamoto
  role: author
  orcid: https://orcid.org/0000-0003-4468-0522
- name: Yasunori Yokoyama
  role: author
  orcid: https://orcid.org/0000-0002-6884-9022
- name: Kanji Takehana
  role: author
  orcid: https://orcid.org/0000-0001-6386-1746
- name: Yasutaka Imanaka
  role: author
  orcid: https://orcid.org/0000-0003-2804-4438
- name: Yuto Nakamura
  role: author
- name: Hideo Kishida
  role: author
  orcid: https://orcid.org/0000-0002-6369-2660
- name: Shoya Kawano
  role: author
- name: Kazuyuki Matsuhira
  role: author
  orcid: https://orcid.org/0000-0001-9185-0016
- name: Koshi Takenaka
  role: author
  orcid: https://orcid.org/0000-0003-3206-1919

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Optical Conductivity
  schema: not_defined
- subject: van der Waals
  schema: not_defined
- subject: one-dimensional
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: '24699950'
  volume: '109'
  issue: '16'
  article_number: L161105

## Conference



## Related item



## Funding

- identifier: 19H05823
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H00346
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H02603
  funder_name: Japan Society for the Promotion of Science
- identifier: 22H04953
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H01831
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H04871
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJAP2314
  funder_name: Japan Science and Technology Corporation
- funder_name: Research Foundation for the Electrotechnology of Chubu
- funder_name: University of Tokyo

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 4fe2b69b-7fc7-4d1d-a4c6-212ce3d7ff6c
  filename: PhysRevB.109.L161105.pdf
  content_type: application/pdf
  size: 699608
  md5: 5121b0dbb1bb6978510a5869472a99dc

## Thumbnail

fileset_id: 4fe2b69b-7fc7-4d1d-a4c6-212ce3d7ff6c
filename: PhysRevB.109.L161105.pdf