Unveiling the complete dispersion of the giant Rashba split surface states of ferroelectric α-GeTe(111) by alkali doping

التفاصيل البيبلوغرافية
العنوان:	Unveiling the complete dispersion of the giant Rashba split surface states of ferroelectric α-GeTe(111) by alkali doping
المؤلفون:	G. Kremer, T. Jaouen, B. Salzmann, L. Nicolaï, M. Rumo, C. W. Nicholson, B. Hildebrand, J. H. Dil, J. Minár, G. Springholz, J. Krempaský, C. Monney
المصدر:	Physical Review Research, Vol 2, Iss 3, p 033115 (2020)
بيانات النشر:	American Physical Society
سنة النشر:	2020
المجموعة:	Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية:	Physics, QC1-999
الوصف:	α-GeTe(111) is a noncentrosymmetric ferroelectric material for which a strong spin-orbit interaction gives rise to giant Rashba split states in the bulk and at the surface. The detailed dispersions of the surface states inside the bulk band gap remains an open question because they are located in the unoccupied part of the electronic structure, making them inaccessible to static angle-resolved photoemission spectroscopy. We show that this difficulty can be overcome via in situ potassium doping of the surface, leading to a rigid shift of 80 meV of the surface states into the occupied states. Thus, we resolve, in great detail, their dispersion and highlight their crossing at the Γ[over ¯] point, which, in comparison with density functional theory calculations, definitively confirms the Rashba mechanism.
نوع الوثيقة:	article in journal/newspaper
اللغة:	English
تدمد:	2643-1564
Relation:	http://doi.org/10.1103/PhysRevResearch.2.033115; https://doaj.org/toc/2643-1564; https://doaj.org/article/f4a45fdfed1e4585bcef9b7c7581e008
DOI:	10.1103/PhysRevResearch.2.033115
الاتاحة:	https://doi.org/10.1103/PhysRevResearch.2.033115 https://doaj.org/article/f4a45fdfed1e4585bcef9b7c7581e008
رقم الانضمام:	edsbas.26D826B
قاعدة البيانات:	BASE

View record in BASE

الوصف
تدمد:	26431564
DOI:	10.1103/PhysRevResearch.2.033115