As-doped SnSe single crystals: Ambivalent doping and interaction with intrinsic defects

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F21%3A39917759" target="_blank" >RIV/00216275:25310/21:39917759 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/21:10427380 RIV/00216224:14310/21:00121244

Result on the web

<a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.085203" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.085203</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.103.085203" target="_blank" >10.1103/PhysRevB.103.085203</a>

Result language

angličtina

Original language name

As-doped SnSe single crystals: Ambivalent doping and interaction with intrinsic defects

Original language description

We performed ambivalent doping study on single crystals of two sets, SnSe1-xAsx and Sn1-xAsxSe, with the aim to explore the interaction of doping species with intrinsic defects. We found that As atoms substitute preferentially for Se atoms in both sets forming the extrinsic substitutional point defect As-Se. In the first set, As lowers the concentration of Sn vacancies, V-Sn, by an order of magnitude compared to undoped stoichiometric SnSe crystal. The remaining Sn vacancies are preferentially coordinated with As atoms. Importantly, a very low concentration of As led to healing process of hosting structure in terms of intrinsic point defects and eventual SnSe2 inclusions. This is reflected in an increase of the Hall mobility and drop of the Hall concentration. In the second set, the concentration of Sn vacancies markedly increases upon doping in contrast to the first set. Additionally, the coordination of Sn vacancies by As atoms is less evident due to the high concentration of vacancies. The substitutional defect As-Se is a deep-level defect that produces no free carriers at room temperature. Moreover, the coupling of V-Sn to As-Se defects increases their activation energy. This results in an unprecedentedly low Hall concentration in SnSe which stays below 10(16) cm(-3) for x = 0.0075. The present study indicates that doping of SnSe is a rather complex process that generally includes a strong interaction of doping atoms with the hosting structure. On the other hand, such doping allows adjustment of the type and concentration of defects. The present study reveals a general tendency of point defects to clustering, which modifies the properties of point defects markedly.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review B

ISSN

2469-9950

e-ISSN

—

Volume of the periodical

103

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

085203

UT code for WoS article

000616412100002

EID of the result in the Scopus database

2-s2.0-85101909353