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Journal Articles

Formation of monolayer V$$_5$$Se$$_8$$ from multilayer VSe$$_2$$ films via V- and Se-desorption

Sumida, Kazuki; Kusaka, Shotaro*; Takeda, Yukiharu; Kobayashi, Katsuyoshi*; Hirahara, Toru*

Physical Review B, 106(19), p.195421_1 - 195421_7, 2022/11

 Times Cited Count:0 Percentile:0(Materials Science, Multidisciplinary)

Journal Articles

Fabrication of (Bi$$_2$$)$$_m$$(Bi$$_2$$Te$$_3$$)$$_n$$ superlattice films by Te desorption from a pristine Bi$$_2$$Te$$_3$$ film

Kusaka, Shotaro*; Sasaki, Taisuke*; Sumida, Kazuki; Ichinokura, Satoru*; Ideta, Shinichiro*; Tanaka, Kiyohisa*; Hono, Kazuhiro*; Hirahara, Toru*

Applied Physics Letters, 120(17), p.173102_1 - 173102_5, 2022/04

 Times Cited Count:2 Percentile:37.1(Physics, Applied)

Journal Articles

Short-range magnetic interaction in a monolayer 1$$T$$-VSe$$_2$$ film revealed by element-specific X-ray magnetic circular dichroism

Sumida, Kazuki; Takeda, Yukiharu; Kusaka, Shotaro*; Kobayashi, Katsuyoshi*; Hirahara, Toru*

Physical Review Materials (Internet), 6(1), p.014006_1 - 014006_8, 2022/01

 Times Cited Count:5 Percentile:68.76(Materials Science, Multidisciplinary)

We investigated the intrinsic magnetic properties of the two-dimensional ferromagnetic candidate monolayer 1$$T$$-VSe$$_2$$ films using X-ray magnetic circular dichroism (XMCD), an element-specific magnetic probe. By performing high-resolution measurements, we succeeded in detecting a clear XMCD signal from the atomically thin 1$$T$$-VSe$$_2$$ films under an external magnetic field. Through manipulation of the X-ray incidence angle, we were able to disentangle the in-plane and out-of-plane magnetic properties and found a strong magnetic anisotropy. Moreover, magnetic field- and temperature-dependent XMCD revealed that there is no long-range ferromagnetic ordering even at 6 K, but short-range ferromagnetic and antiferromagnetic interactions between neighboring vanadium ions exist. Such low-temperature magnetic behavior signifies that the monolayer 1$$T$$-VSe$$_2$$ is on the verge of ferromagnetism, and this fact accounts for the reported ferromagnetism in VSe$$_2$$-based heterostructures.

Journal Articles

Absence of ferromagnetism in MnBi$$_2$$Te$$_4$$/Bi$$_2$$Te$$_3$$ down to 6 K

Fukasawa, Takuro*; Kusaka, Shotaro*; Sumida, Kazuki; Hashizume, Mizuki*; Ichinokura, Satoru*; Takeda, Yukiharu; Ideta, Shinichiro*; Tanaka, Kiyohisa*; Shimizu, Ryota*; Hitosugi, Taro*; et al.

Physical Review B, 103(20), p.205405_1 - 205405_6, 2021/05

 Times Cited Count:7 Percentile:67.62(Materials Science, Multidisciplinary)

Journal Articles

Fabrication of a novel magnetic topological heterostructure and temperature evolution of its massive Dirac cone

Hirahara, Toru*; Otrokov, M. M.*; Sasaki, Taisuke*; Sumida, Kazuki*; Tomohiro, Yuta*; Kusaka, Shotaro*; Okuyama, Yuma*; Ichinokura, Satoru*; Kobayashi, Masaki*; Takeda, Yukiharu; et al.

Nature Communications (Internet), 11, p.4821_1 - 4821_8, 2020/09

 Times Cited Count:35 Percentile:93.42(Multidisciplinary Sciences)

Oral presentation

Magnetism of monolayer VSe$$_2$$ films probed by soft X-ray magnetic circular dichroism

Sumida, Kazuki; Takeda, Yukiharu; Kusaka, Shotaro*; Kobayashi, Katsuyoshi*; Hirahara, Toru*

no journal, , 

no abstracts in English

Oral presentation

Short-range ferromagnetic interaction in a monolayer VSe$$_2$$ film revealed by element-specific X-ray magnetic circular dichroism

Sumida, Kazuki; Takeda, Yukiharu; Kusaka, Shotaro*; Kobayashi, Katsuyoshi*; Hirahara, Toru*

no journal, , 

Oral presentation

Thickness and growth condition-dependent electronic structure of VSe$$_2$$ films

Sumida, Kazuki; Kusaka, Shotaro*; Takeda, Yukiharu; Kobayashi, Katsuyoshi*; Hirahara, Toru*

no journal, , 

no abstracts in English

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