Magnetic stability of oxygen defects on the SiO2 surface

Magnetic stability of oxygen defects on the SiO2 surface

The magnetic stability of E′ centers and the peroxy radical on the surface of α-quartz is investigated with first-principles calculations to understand their role in magnetic flux noise in superconducting qubits (SQs) and superconducting quantum interference devices (SQUIDs) fabricated on amorphous...

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Main Authors: Nicole Adelstein, Donghwa Lee, Jonathan L. DuBois, Keith G. Ray, Joel B. Varley, Vincenzo Lordi
Format: Article
Language:English
Published: AIP Publishing LLC 2017-02-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.4977194
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spelling doaj-fdbade4544244c6bbb7f82d88497a5302020-11-24T22:39:57ZengAIP Publishing LLCAIP Advances2158-32262017-02-0172025110025110-1310.1063/1.4977194041702ADVMagnetic stability of oxygen defects on the SiO2 surfaceNicole Adelstein0Donghwa Lee1Jonathan L. DuBois2Keith G. Ray3Joel B. Varley4Vincenzo Lordi5Lawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USALawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USALawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USALawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USALawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USALawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USAThe magnetic stability of E′ centers and the peroxy radical on the surface of α-quartz is investigated with first-principles calculations to understand their role in magnetic flux noise in superconducting qubits (SQs) and superconducting quantum interference devices (SQUIDs) fabricated on amorphous silica substrates. Paramagnetic E′ centers are common in both stoichiometric and oxygen deficient silica and quartz, and we calculate that they are more common on the surface than the bulk. However, we find the surface defects are magnetically stable in their paramagnetic ground state and thus will not contribute to 1/f noise through fluctuation at millikelvin temperatures.http://dx.doi.org/10.1063/1.4977194
collection DOAJ
language English
format Article
sources DOAJ
author Nicole Adelstein
Donghwa Lee
Jonathan L. DuBois
Keith G. Ray
Joel B. Varley
Vincenzo Lordi
spellingShingle Nicole Adelstein
Donghwa Lee
Jonathan L. DuBois
Keith G. Ray
Joel B. Varley
Vincenzo Lordi
Magnetic stability of oxygen defects on the SiO2 surface
AIP Advances
author_facet Nicole Adelstein
Donghwa Lee
Jonathan L. DuBois
Keith G. Ray
Joel B. Varley
Vincenzo Lordi
author_sort Nicole Adelstein
title Magnetic stability of oxygen defects on the SiO2 surface
title_short Magnetic stability of oxygen defects on the SiO2 surface
title_full Magnetic stability of oxygen defects on the SiO2 surface
title_fullStr Magnetic stability of oxygen defects on the SiO2 surface
title_full_unstemmed Magnetic stability of oxygen defects on the SiO2 surface
title_sort magnetic stability of oxygen defects on the sio2 surface
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2017-02-01
description The magnetic stability of E′ centers and the peroxy radical on the surface of α-quartz is investigated with first-principles calculations to understand their role in magnetic flux noise in superconducting qubits (SQs) and superconducting quantum interference devices (SQUIDs) fabricated on amorphous silica substrates. Paramagnetic E′ centers are common in both stoichiometric and oxygen deficient silica and quartz, and we calculate that they are more common on the surface than the bulk. However, we find the surface defects are magnetically stable in their paramagnetic ground state and thus will not contribute to 1/f noise through fluctuation at millikelvin temperatures.
url http://dx.doi.org/10.1063/1.4977194
work_keys_str_mv AT nicoleadelstein magneticstabilityofoxygendefectsonthesio2surface
AT donghwalee magneticstabilityofoxygendefectsonthesio2surface
AT jonathanldubois magneticstabilityofoxygendefectsonthesio2surface
AT keithgray magneticstabilityofoxygendefectsonthesio2surface
AT joelbvarley magneticstabilityofoxygendefectsonthesio2surface
AT vincenzolordi magneticstabilityofoxygendefectsonthesio2surface
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