Author/Authors :
Rikiya Yoshida، نويسنده , , Yoshiaki Nakamura، نويسنده , , Masaki Fukui، نويسنده , , Yoshinori Haga، نويسنده , , Etsuji Yamamoto، نويسنده , , Yoshichika ?nuki، نويسنده , , Mario Okawa، نويسنده , , Shik Shin، نويسنده , , Masaaki Hirai، نويسنده , , Yuji Muraoka، نويسنده , , Takayoshi Yokoya، نويسنده ,
Abstract :
We have studied the electronic structures of URu2Si2 employing ultrahigh-resolution laser angle-resolved photoemission spectroscopy. The change of photoemission spectra is investigated across the hidden-order transition, and the emergence of a narrow band is clearly observed near the Fermi level for both (π,0)(π,0) and (π,π)(π,π) directions. In addition, it is shown that tuning of lightʹs polarization allows the signal of a hole-like dispersive feature to enhance. These observations prove that laser angle-resolved photoemission spectroscopy is an effective tool for studying the evolution of electronic structures across the hidden-order transition in URu2Si2.
