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We performed a crystal growth to obtain chirality-controlled enantiopurecrystals using a laser-diode-heated floating zone (LDFZ) method with acomposition-gradient feed rod. It has been argued that the crystal handednessof $T$Si ($T$ : transition metal) is fixed depending on $T$ in the case of theones grown by the conventional methods. We found that right-handed singlecrystals of CoSi and MnSi were grown from the composition gradient feed rodsthat consist of FeSi--CoSi and FeSi--MnSi, respectively. The obtained CoSi andMnSi crystals inherit the chirality from the seed part of FeSi, which grows ina right-handed structure, and thus have the chirality opposite to that for thecrystals in the literature. The LDFZ method with the feed rods with variouscombinations of $T$Si compounds enables a flexible control of the chirality of$T$Si and will be useful for clarifying the interplay between the crystallinechirality and chirality-induced physical responses.

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