Rydberg excitons in synthetic cuprous oxide Cu2O

被引：26

作者：

Lynch, Stephen A. ^{[1
]}

Hodges, Chris ^{[1
]}

Mandal, Soumen ^{[1
]}

Langbein, Wolfgang ^{[1
]}

Singh, Ravi P. ^{[2
]}

Gallagher, Liam A. P. ^{[3
]}

Pritchett, Jon D. ^{[3
]}

Pizzey, Danielle ^{[3
]}

Rogers, Joshua P. ^{[3
]}

Adams, Charles S. ^{[3
]}

Jones, Matthew P. A. ^{[3
]}

机构：

[1] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales

[2] Indian Inst Sci Educ & Res IISER Bhopal, Dept Phys, Bhopal By Pass Rd, Bhopal 462066, Madhya Pradesh, India

[3] Univ Durham, Joint Quantum Ctr Durham Newcastle, Dept Phys, Durham DH1 3LE, England

来源：

PHYSICAL REVIEW MATERIALS | 2021年 / 5卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

OPTICAL-ABSORPTION; OXYGEN VACANCIES; THIN-FILMS; COPPER; DEPOSITION; ELECTRONS; CRYSTALS;

D O I：

10.1103/PhysRevMaterials.5.084602

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-lying Rydberg states of Mott-Wannier excitons are receiving considerable interest due to the possibility of adding long-range interactions to the physics of excitons. Here, we study Rydberg excitation in bulk synthetic cuprous oxide grown by the optical float zone technique and compare the result with natural samples. X-ray characterization confirms both materials are mostly single crystal, and midinfrared transmission spectroscopy revealed little difference between synthetic and natural material. The synthetic samples show principal quantum numbers up to n = 10, exhibit additional absorption lines, plus enhanced spatial broadening and spatial inho-mogeneity. Room temperature and cryogenic photoluminescence measurements reveal a significant quantity of copper vacancies in the synthetic material. These measurements provide a route towards achieving high-n excitons in synthetic crystals, opening a route to scalable quantum devices.

引用

页数：10

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