Spin-dependent Quantum Interference in Photoemission Process from Spin-orbit Coupled States

Overview

Journal Nat Commun

Specialty Biology

Date 2017 Feb 25

PMID 28232721

Citations 9

Authors

Koichiro Yaji

Kenta Kuroda

Sogen Toyohisa

Ayumi Harasawa

Yukiaki Ishida

Shuntaro Watanabe

Chuangtian Chen

Katsuyoshi Kobayashi

Fumio Komori

Shik Shin

Affiliations

Soon will be listed here.

Abstract

Spin-orbit interaction entangles the orbitals with the different spins. The spin-orbital-entangled states were discovered in surface states of topological insulators. However, the spin-orbital-entanglement is not specialized in the topological surface states. Here, we show the spin-orbital texture in a surface state of Bi(111) by laser-based spin- and angle-resolved photoelectron spectroscopy (laser-SARPES) and describe three-dimensional spin-rotation effect in photoemission resulting from spin-dependent quantum interference. Our model reveals that, in the spin-orbit-coupled systems, the spins pointing to the mutually opposite directions are independently locked to the orbital symmetries. Furthermore, direct detection of coherent spin phenomena by laser-SARPES enables us to clarify the phase of the dipole transition matrix element responsible for the spin direction in photoexcited states. These results permit the tuning of the spin polarization of optically excited electrons in solids with strong spin-orbit interaction.

Citing Articles

Visualization of spin-polarized surface resonances in Pb-based ternary topological insulators.

Yaji K, Hattori Y, Yoshizawa S, Tsuda S, Komori F, Yamaji Y Sci Rep. 2024; 14(1):25868.

PMID: 39468187 PMC: 11519638. DOI: 10.1038/s41598-024-76493-9.

Efficiency improvement of spin-resolved ARPES experiments using Gaussian process regression.

Iwasawa H, Ueno T, Iwata T, Kuroda K, Kokh K, Tereshchenko O Sci Rep. 2024; 14(1):20970.

PMID: 39313521 PMC: 11420225. DOI: 10.1038/s41598-024-66704-8.

Spin polarization of photoelectrons emitted from spin-orbit coupled surface states of Pb/Ge(111).

Yaji K, Kuroda K, Tsuda S, Komori F Microscopy (Oxf). 2024; 73(5):439-445.

PMID: 38661285 PMC: 11452749. DOI: 10.1093/jmicro/dfae021.

Phase-Selective Epitaxy of Trigonal and Orthorhombic Bismuth Thin Films on Si (111).

Jalil A, Hou X, Schuffelgen P, Bae J, Neumann E, Mussler G Nanomaterials (Basel). 2023; 13(14).

PMID: 37513154 PMC: 10386495. DOI: 10.3390/nano13142143.

Breakdown of bulk-projected isotropy in surface electronic states of topological Kondo insulator SmB(001).

Ohtsubo Y, Nakaya T, Nakamura T, Le Fevre P, Bertran F, Iga F Nat Commun. 2022; 13(1):5600.

PMID: 36151212 PMC: 9508144. DOI: 10.1038/s41467-022-33347-0.

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