Revealing the Hidden Spin-Polarized Bands in a Superconducting Tl Bilayer Crystal
Artikel i vetenskaplig tidskrift, 2023

The interplay of spin-orbit coupling and crystal symmetry can generate spin-polarized bands in materials only a few atomic layers thick, potentially leading to unprecedented physical properties. In the case of bilayer materials with global inversion symmetry, locally broken inversion symmetry can generate degenerate spin-polarized bands, in which the spins in each layer are oppositely polarized. Here, we demonstrate that the hidden spins in a Tl bilayer crystal are revealed by growing it on Ag(111) of sizable lattice mismatch, together with the appearance of a remarkable phenomenon unique to centrosymmetric hidden-spin bilayer crystals: a novel band splitting in both spin and space. The key to success in observing this novel splitting is that the interaction at the interface has just the right strength: it does not destroy the original wave functions of the Tl bilayer but is strong enough to induce an energy separation.

spintronics

superconductor

hidden spin

bilayer material

photoelectron spectroscopy

Författare

Takahiro Kobayashi

Osaka University

Yuichiro Toichi

Osaka University

Koichiro Yaji

National Institute for Materials Science (NIMS)

Yoshitaka Nakata

Chiba University

Yuchi Yaoita

Chiba University

Mutsuki Iwaoka

Chiba University

Mariko Koga

Chiba University

Yituo Zhang

Chiba University

J. Fujii

Laboratorio Nazionale TASC

Shimpei Ono

Central Research Institute of Electric Power Industry (CRIEPI)

Yasmine Sassa

Chalmers, Fysik, Materialfysik

Yasuo Yoshida

University of Tokyo

Yukio Hasegawa

University of Tokyo

Fumio Komori

University of Tokyo

Shik Shin

University of Tokyo

Satoru Ichinokura

University of Tokyo

Ryota Akiyama

University of Tokyo

Shuji Hasegawa

University of Tokyo

Tatsuya Shishidou

University of Wisconsin Milwaukee

Michael Weinert

University of Wisconsin Milwaukee

Kazuyuki Sakamoto

Center for Spintronics Research Network

Osaka University

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 23 16 7675-7682

Framtidens Lågdimensionella Skyrmion Material

Vetenskapsrådet (VR) (2017-05078), 2019-06-01 -- 2021-12-31.

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1021/acs.nanolett.3c02387

PubMed

37578323

Mer information

Senast uppdaterat

2023-09-07