Tunable spin polarization in bismuth ultrathin film on Si(111)

Akari Takayama; Takafumi Sato; Seigo Souma; Tamio Oguchi; Takashi Takahashi

doi:10.1021/nl2035018

Tunable spin polarization in bismuth ultrathin film on Si(111)

Akari Takayama^*, Takafumi Sato, Seigo Souma, Tamio Oguchi, Takashi Takahashi

^*この研究の対応する著者

研究成果: Article › 査読

61 被引用数 (Scopus)

抄録

We performed a spin- and angle-resolved photoemission spectroscopy of bismuth ultrathin film on Si(111) with various film thickness d. We found that the spin polarization of spin-split Rashba surface states near the Brillouin-zone boundary, which is high (0.7) at d = 40 BL (bilayers), is gradually reduced on decreasing d and almost vanishes at d = 8 BL. This finding provides a novel method to generate spin-polarized electrons with tunable spin-polarization.

本文言語	English
ページ（範囲）	1776-1779
ページ数	4
ジャーナル	Nano Letters
巻	12
号	4
DOI	https://doi.org/10.1021/nl2035018
出版ステータス	Published - 2012 4月 11
外部発表	はい

ASJC Scopus subject areas

バイオエンジニアリング
化学 (全般)
材料科学（全般）
凝縮系物理学
機械工学

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10.1021/nl2035018

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title = "Tunable spin polarization in bismuth ultrathin film on Si(111)",

abstract = "We performed a spin- and angle-resolved photoemission spectroscopy of bismuth ultrathin film on Si(111) with various film thickness d. We found that the spin polarization of spin-split Rashba surface states near the Brillouin-zone boundary, which is high (0.7) at d = 40 BL (bilayers), is gradually reduced on decreasing d and almost vanishes at d = 8 BL. This finding provides a novel method to generate spin-polarized electrons with tunable spin-polarization.",

keywords = "Rashba metal, Spintronics, bismuth, photoemission spectroscopy, spin-orbit coupling",

author = "Akari Takayama and Takafumi Sato and Seigo Souma and Tamio Oguchi and Takashi Takahashi",

year = "2012",

month = apr,

day = "11",

doi = "10.1021/nl2035018",

language = "English",

volume = "12",

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journal = "Nano Letters",

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T1 - Tunable spin polarization in bismuth ultrathin film on Si(111)

AU - Takayama, Akari

AU - Sato, Takafumi

AU - Souma, Seigo

AU - Oguchi, Tamio

AU - Takahashi, Takashi

PY - 2012/4/11

Y1 - 2012/4/11

N2 - We performed a spin- and angle-resolved photoemission spectroscopy of bismuth ultrathin film on Si(111) with various film thickness d. We found that the spin polarization of spin-split Rashba surface states near the Brillouin-zone boundary, which is high (0.7) at d = 40 BL (bilayers), is gradually reduced on decreasing d and almost vanishes at d = 8 BL. This finding provides a novel method to generate spin-polarized electrons with tunable spin-polarization.

AB - We performed a spin- and angle-resolved photoemission spectroscopy of bismuth ultrathin film on Si(111) with various film thickness d. We found that the spin polarization of spin-split Rashba surface states near the Brillouin-zone boundary, which is high (0.7) at d = 40 BL (bilayers), is gradually reduced on decreasing d and almost vanishes at d = 8 BL. This finding provides a novel method to generate spin-polarized electrons with tunable spin-polarization.

KW - Rashba metal

KW - Spintronics

KW - bismuth

KW - photoemission spectroscopy

KW - spin-orbit coupling

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DO - 10.1021/nl2035018

M3 - Article

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AN - SCOPUS:84859715384

SN - 1530-6984

VL - 12

SP - 1776

EP - 1779

JO - Nano Letters

JF - Nano Letters

IS - 4

ER -

Tunable spin polarization in bismuth ultrathin film on Si(111)

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ASJC Scopus subject areas

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