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Aluminum vacancy/sulfur complex in wurtzite AlN as an optically controllable spin qubit

Journal Article · · Physical Review. B
 [1];  [2]
  1. University of Central Florida, Orlando, FL (United States); Tuskegee University
  2. Tuskegee University, AL (United States)
+ Show Author Affiliations
Using our rational methodology, we reveal a defect in wurtzite AlN that can serve as an optically controllable spin qubit. It combines an Al vacancy and a S atom substituting the neighboring N atom (VAl⁢SN). Linear response GW and Bethe-Salpeter equation calculations guide us to find suitable ground and excited triplet and singlet states of VAl⁢SN. The obtained optical spin-polarization cycle is similar to that observed in the negative nitrogen-vacancy (NV–) center in diamond. Furthermore, the calculated optical oscillator strengths for VAl⁢SN suggest that, in contrast to the NV– center, the optical emission in the singlet and triplet states have comparable rates, which is favorable for the qubit functionality.
Research Organization:
Tuskegee University, AL (United States); Univ. of Central Florida, Orlando, FL (United States); University of Central Florida, Orlando, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0024487
OSTI ID:
2373057
Alternate ID(s):
OSTI ID: 2473774
OSTI ID: 2867496
Report Number(s):
DOE-Tuskegee-UCF-PRBLett-SC4487
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 24 Vol. 109; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Bethe-Salpeter
GW
oscillator strength
spin qubit
spin-polarization cycle
triplet
singlet
wurtzite AlN