Chirality-Controlled Enantiopure Crystal Growth of a Transition Metal Monosilicide by a Floating Zone Method

We performed a crystal growth to obtain chirality-controlled enantiopure crystals using a laser-diode-heated floating zone (LDFZ) method with a composition-gradient feed rod. It has been argued that the crystal handedness of \(T\)Si (\(T\) : transition metal) is fixed depending on \(T\) in the case...

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Bibliographic Details
Published inarXiv.org
Main Authors Kousaka, Yusuke, Iwasaki, Satoshi, Taisei Sayo, Tanida, Hiroshi, Matsumura, Takeshi, Araki, Shingo, Jun Akimitsu, Togawa, Yoshihiko
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.01.2022
Subjects
Chirality
Composition
Crystal growth
Crystals
Iron silicide
Laser beam heating
Manganese silicide
Rods
Semiconductor lasers
Silicon compounds
Single crystals
Transition metals
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Summary:We performed a crystal growth to obtain chirality-controlled enantiopure crystals using a laser-diode-heated floating zone (LDFZ) method with a composition-gradient feed rod. It has been argued that the crystal handedness of \(T\)Si (\(T\) : transition metal) is fixed depending on \(T\) in the case of the ones grown by the conventional methods. We found that right-handed single crystals of CoSi and MnSi were grown from the composition gradient feed rods that consist of FeSi--CoSi and FeSi--MnSi, respectively. The obtained CoSi and MnSi crystals inherit the chirality from the seed part of FeSi, which grows in a right-handed structure, and thus have the chirality opposite to that for the crystals in the literature. The LDFZ method with the feed rods with various combinations of \(T\)Si compounds enables a flexible control of the chirality of \(T\)Si and will be useful for clarifying the interplay between the crystalline chirality and chirality-induced physical responses.
ISSN:2331-8422