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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

61 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1776-1779
Number of pages	4
Journal	Nano Letters
Volume	12
Issue number	4
DOIs	https://doi.org/10.1021/nl2035018
Publication status	Published - 2012 Apr 11
Externally published	Yes

Keywords

Rashba metal
Spintronics
bismuth
photoemission spectroscopy
spin-orbit coupling

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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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",

pages = "1776--1779",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

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TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=84859715384&partnerID=8YFLogxK

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U2 - 10.1021/nl2035018

DO - 10.1021/nl2035018

M3 - Article

C2 - 22448971

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)

Abstract

Keywords

ASJC Scopus subject areas

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