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Valley-orbit splitting of lithium-related donors in silicon

Pavlov, Sergey and Abrosimov, N. V. and Hübers, Heinz-Wilhelm (2023) Valley-orbit splitting of lithium-related donors in silicon. Physical Review B, 107, p. 115205. American Physical Society. doi: 10.1103/PhysRevB.107.115205. ISSN 2469-9950.

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Official URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.115205


The energy spectra of lithium-related donors in silicon are revisited by temperature dependent infrared absorption spectroscopy. We determine the valley-orbit splitting of an interstitial isolated lithium donor and its complex with residual oxygen in float-zone grown crystals doped from the melt. Lithium-oxygen donors exhibit a temperature evolution of their absorption spectra similar to that of substitutional single-electron group-V donors, while its valley-orbit splitting is corrected upwards to +9.865(5) meV. For the lithium donor, the previously reported inverted valley-orbit splitting is not confirmed since the components of different symmetry are not spectrally resolved in our study. Instead, the chemical shift of the ground state of the donor, having a symmetry different from that of group-V donors, was corrected to a slightly larger value of 1.82(2) meV. Intracenter transitions from the split-off ground state of the Li donor exhibit an anomalous broadening. In addition, several Rydberg-like high excited states, up to 7h±, of lithium-related centers were determined from absorption spectra of moderately doped samples.

Item URL in elib:https://elib.dlr.de/198370/
Document Type:Article
Title:Valley-orbit splitting of lithium-related donors in silicon
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Abrosimov, N. V.Leibniz-Institut für Kristallzüchtung (IKZ), BerlinUNSPECIFIEDUNSPECIFIED
Date:20 March 2023
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 115205
Publisher:American Physical Society
Keywords:silicon, donors, valley-orbit splitting
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Detectors for optical instruments
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Pavlov, Dr. Sergey
Deposited On:24 Oct 2023 08:51
Last Modified:04 Dec 2023 11:23

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