A defect in diamond with long spin relaxation times at room temperature

Oral-In-person

Abstract

Spin defects in diamond are promising platforms for quantum sensing and quantum information processing. However, very few solid-state defects show spin properties comparable to nitrogen vacancy centers in diamond, especially at elevated temperatures. Here, we characterize the WAR5 defect [1] using pulsed electron spin resonance and observe long spin relaxation (T1) and coherence (T2) times. The T1 is 14.38 min at 4 K and 0.97 ms at room temperature. The T2 is observed to be 245 μs at 4 K, which we determine to be limited by P1 centers in the sample. Using dynamical decoupling, we extend T2 to 6.49 ms. Furthermore, we demonstrate wavelength-dependent optical spin polarization in the blue region of the visible spectrum and point out potential zero-phonon line candidates in photoluminescence. Based on electronic structure calculations and the growth chemistry of the diamond, we assign the defect as the neutral oxygen vacancy center.

[1] B. L. Cann, Ph.D. thesis, University of Warwick (2009).

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Presenters

  • Sounak Mukherjee

    • Princeton University

Authors

  • Sounak Mukherjee

    • Princeton University

  • Anran Li

  • Johannes Eberle

  • Sean Karg

    • Princeton University

  • Zi-Huai Zhang

  • Mayer Feldman

    • Intel

  • Yogendra Limbu

    • University of Iowa

  • Tharnier Puel

    • University of Iowa

  • Yueguang Shi

    • University of Iowa

  • Yilin Chen

    • University of California, Santa Barbara

  • Patryk Gumann

  • Chris Van de Walle

    • University of California, Santa Barbara

  • Michael Flatté

    • University of Iowa

  • Stephen Lyon

  • Nathalie de Leon

    • Princeton University