Upper limit of temperature-gradient--induced internal magnetic field in tellurium revealed by muon spin rotation

テルルにおける温度勾配誘起内部磁場上限値のミュオンスピン回転による解明

今井 正樹  ; 荒木 康史   ; 小野 凌太  ; 伊藤 孝   ; 一色 弘成; 吉川 貴史; 船戸 匠; 芳賀 芳範   ; 有沢 洋希*; 齊藤 英治; 家田 淳一   ; 中堂 博之 

Imai, Masaki; Araki, Yasufumi; Ono, Ryota; Ito, Takashi; Isshiki, Hironari; Kikkawa, Takashi; Funato, Takumi; Haga, Yoshinori; Arisawa, Hiroki*; Saito, Eiji; Ieda, Junichi; Chudo, Hiroyuki

The temperature-gradient-induced Hall-like response has been reported in chiral tellurium; however, whether it originates from a static magnetization remains unclear. Here, we perform zero-field muon spin rotation (SR) measurements on single-crystalline Te under a temperature gradient. No muon spin precession or static relaxation is observed. From the experimental sensitivity and dipolar-field estimates based on calculated muon stopping sites, we place an upper limit of 0.05 mT on the local magnetic field, corresponding to a magnetic moment smaller than per Te atom. These results rule out bulk static magnetization induced by temperature gradient as the origin of the Hall-like response.