Electrons Move in Preferred Direction in Cuprate Superconductors: WPI-MANA

WPI-MANA

2021/11/18 17:00

TSUKUBA, Japan, Nov 18, 2021 /Kyodo JBN/ --

International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS)

A team at the International Center for Materials Nanoarchitectonics (WPI-MANA) has gleaned important insights into the properties of Lanthanum-based cuprate superconductors, the highest-temperature superconducting family yet discovered under ambient pressure.

 

(Image: https://kyodonewsprwire.jp/prwfile/release/M105739/202111052920/_prw_PI1fl_xUCB97EN.jpg)

 

The team’s results imply that, in contrast to common belief among researchers for the last 35 years, electrons have a preferred direction along either the x or the y axis in each CuO2 plane, and the preferred direction alternates between the planes.

 

High-temperature cuprate superconductors have continued to generate keen interest for more than 30 years due to the various phenomena they exhibit with changes in carrier doping and temperature, such as the pseudogap phase, nematic order, charge-density wave and spin-density wave, as well as superconductivity.

 

The Fermi surface is fundamental in condensed matter physics for understanding metallic properties. Its shape directly reflects the electron motion inside the material and as such it is the key to understanding materials’ properties.

 

High-temperature cuprate superconductors are characterized by stacks of copper–oxygen (CuO2) planes, a fact that has convinced many researchers that electrons exhibit two-dimensional motion in CuO2 planes.

 

The WPI-MANA team, led by Hiroyuki Yamase, applied the high-resolution X-ray Compton scattering technique to a sample of La(2-x)Sr(x)CuO4 and imaged the momentum distribution of electrons.

 

The results provide new understanding of the electronic properties of cuprate superconductors. Compton scattering can be a powerful tool to elucidate electronic properties in materials and sometimes works beyond other widely employed techniques. The researchers said it will be exciting to see the technique employed as a complement to other methods.

 

This research was carried out by Hiroyuki Yamase of WPI-MANA and his collaborators.

 

“Fermi Surface in La-Based Cuprate Superconductors from Compton Scattering Imaging”

Yamase, H., Sakurai, Y., Fujita, M. et al. Nat Commun 12, 2223 (2021)

https://doi.org/10.1038/s41467-021-22229-6

 

MANA E-BULLETIN

https://www.nims.go.jp/mana/ebulletin/

本プレスリリースは発表元が入力した原稿をそのまま掲載しております。また、プレスリリースへのお問い合わせは発表元に直接お願いいたします。

プレスリリース添付画像

| Small | Normal |
| Big | Original |

このプレスリリースには、報道機関向けの情報があります。

プレス会員登録を行うと、広報担当者の連絡先や、イベント・記者会見の情報など、報道機関だけに公開する情報が閲覧できるようになります。

プレスリリース受信に関するご案内

このプレスリリースを配信した企業・団体

  • 名称 国立研究開発法人物質・材料研究機構(NIMS) 国際ナノアーキテクト二クス研究拠点(WPI-MANA)
  • 所在地 茨城県
  • 業種 各種団体
  • URL https://www.nims.go.jp/mana/jp/
  • ※購読している企業の確認や削除はWebプッシュ通知設定画面で行なってください
  • SNSでも最新のプレスリリース情報をいち早く配信中