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Title: Magnetic stability of oxygen defects on the SiO2 surface

Abstract

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.

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550, USA and San Francisco State University, San Francisco, California 94132, USA
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1349365
Alternate Identifier(s):
OSTI ID: 1395303; OSTI ID: 1420520
Grant/Contract Number:  
AC52-07NA28344; 12-ERD-020; 15-ERD-051
Resource Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Name: AIP Advances Journal Volume: 7 Journal Issue: 2; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Silica; Crystal defects; Excited states; Valence bands; Dangling bonds

Citation Formats

Adelstein, Nicole, Lee, Donghwa, DuBois, Jonathan L., Ray, Keith G., Varley, Joel B., and Lordi, Vincenzo. Magnetic stability of oxygen defects on the SiO2 surface. United States: N. p., 2017. Web. doi:10.1063/1.4977194.
Adelstein, Nicole, Lee, Donghwa, DuBois, Jonathan L., Ray, Keith G., Varley, Joel B., & Lordi, Vincenzo. Magnetic stability of oxygen defects on the SiO2 surface. United States. doi:10.1063/1.4977194.
Adelstein, Nicole, Lee, Donghwa, DuBois, Jonathan L., Ray, Keith G., Varley, Joel B., and Lordi, Vincenzo. Tue . "Magnetic stability of oxygen defects on the SiO2 surface". United States. doi:10.1063/1.4977194.
@article{osti_1349365,
title = {Magnetic stability of oxygen defects on the SiO2 surface},
author = {Adelstein, Nicole and Lee, Donghwa and DuBois, Jonathan L. and Ray, Keith G. and Varley, Joel B. and Lordi, Vincenzo},
abstractNote = {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.},
doi = {10.1063/1.4977194},
journal = {AIP Advances},
number = 2,
volume = 7,
place = {United States},
year = {2017},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1063/1.4977194

Citation Metrics:
Cited by: 1 work
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