Discovery of a new type of topological Weyl fermion semimetal state in MoxW1−xTe2

DOI DOI HANDLE HANDLE PDF ほか1件をすべて表示 一部だけ表示 被引用文献10件 参考文献51件 オープンアクセス

説明

<jats:title>Abstract</jats:title><jats:p>The recent discovery of a Weyl semimetal in TaAs offers the first Weyl fermion observed in nature and dramatically broadens the classification of topological phases. However, in TaAs it has proven challenging to study the rich transport phenomena arising from emergent Weyl fermions. The series Mo<jats:sub><jats:italic>x</jats:italic></jats:sub>W<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Te<jats:sub>2</jats:sub> are inversion-breaking, layered, tunable semimetals already under study as a promising platform for new electronics and recently proposed to host Type II, or strongly Lorentz-violating, Weyl fermions. Here we report the discovery of a Weyl semimetal in Mo<jats:sub><jats:italic>x</jats:italic></jats:sub>W<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Te<jats:sub>2</jats:sub> at <jats:italic>x</jats:italic>=25%. We use pump-probe angle-resolved photoemission spectroscopy (pump-probe ARPES) to directly observe a topological Fermi arc above the Fermi level, demonstrating a Weyl semimetal. The excellent agreement with calculation suggests that Mo<jats:sub><jats:italic>x</jats:italic></jats:sub>W<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Te<jats:sub>2</jats:sub> is a Type II Weyl semimetal. We also find that certain Weyl points are at the Fermi level, making Mo<jats:sub><jats:italic>x</jats:italic></jats:sub>W<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Te<jats:sub>2</jats:sub> a promising platform for transport and optics experiments on Weyl semimetals.</jats:p>

収録刊行物

被引用文献 (10)*注記

もっと見る

参考文献 (51)*注記

もっと見る

関連プロジェクト

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ