Manipulating the Charge State of Spin Defects in Hexagonal Boron Nitride

• URL: http://arxiv.org/abs/2305.05866v1
• Date: Wed, 10 May 2023 03:18:05 GMT
• Title: Manipulating the Charge State of Spin Defects in Hexagonal Boron Nitride
• Authors: Angus Gale, Dominic Scognamiglio, Ivan Zhigulin, Benjamin Whitefield, Mehran Kianinia, Igor Aharonovich and Milos Toth
• Abstract summary: Negatively charged boron vacancies ($smallV_B-$) in hexagonal boron nitride (hBN) have recently gained interest as spin defects. Here, we investigate charge state switching of $smallV_B$ defects under laser and electron beam excitation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Negatively charged boron vacancies ($\small{V_B^-}$) in hexagonal boron nitride (hBN) have recently gained interest as spin defects for quantum information processing and quantum sensing by a layered material. However, the boron vacancy can exist in a number of charge states in the hBN lattice, but only the -1 state has spin-dependent photoluminescence and acts as a spin-photon interface. Here, we investigate charge state switching of $\small{V_B}$ defects under laser and electron beam excitation. We demonstrate deterministic, reversible switching between the -1 and 0 states ($\small{V_B^- \rightleftharpoons V_B^0 + e^-}$), occurring at rates controlled by excess electrons or holes injected into hBN by a layered heterostructure device. Our work provides a means to monitor and manipulate the $\small{V_B}$ charge state, and to stabilize the -1 state which is a prerequisite for optical spin manipulation and readout of the defect.

Related papers

• Isotopic control of the boron-vacancy spin defect in hexagonal boron nitride [0.0]
  We show that isotopic purification of hBN with $15$N yields a simplified and well-resolved hyperfine structure of V$_textB-$ centers. We then demonstrate optically-induced polarization of $15$N nuclei in h$10$B$15$N, whose mechanism relies on electron-nuclear spin mixing in the V$_textB-$ ground state.
  arXiv  Detail & Related papers  (2023-07-13T14:26:22Z)
• Coherent dynamics of strongly interacting electronic spin defects in hexagonal boron nitride [3.93972364832565]
  Optically active spin defects in van der Waals materials are promising platforms for modern quantum technologies. Here we investigate the coherent dynamics of strongly interacting ensembles of negatively charged boron-vacancy centers in hexagonal boron nitride (hBN) with varying defect density. Our results provide new insights on the spin and charge properties of $mathrmV_mathrmB-$, which are important for future use of defects in hBN as quantum sensors and simulators.
  arXiv  Detail & Related papers  (2022-10-20T18:00:00Z)
• A first-principles calculation of electron-phonon interactions for the $\text{C}_2\text{C}_\text{N}$ and $\text{V}_\text{N}\text{N}_\text{B}$ defects in hexagonal boron nitride [52.77024349608834]
  Quantum emitters in two-dimensional hexagonal boron nitride (h-BN) have generated significant interest. Recent observations of Fourier transform (FT) limited photons emitted from h-BN flakes at room temperature.
  arXiv  Detail & Related papers  (2022-07-28T23:31:38Z)
• Quantum density matrix theory for a laser without adiabatic elimination of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
  No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory. Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons. This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
  arXiv  Detail & Related papers  (2022-05-26T16:33:51Z)
• Computational Insights into Electronic Excitations, Spin-Orbit Coupling Effects, and Spin Decoherence in Cr(IV)-based Molecular Qubits [63.18666008322476]
  We provide insights into key properties of Cr(IV)-based molecules aimed at assisting chemical design of efficient molecular qubits. We find that the sign of the uniaxial zero-field splitting (ZFS) parameter is negative for all considered molecules. We quantify (super)hyperfine coupling to the $53$Cr nuclear spin and to the $13C and $1H nuclear spins.
  arXiv  Detail & Related papers  (2022-05-01T01:23:10Z)
• Decoherence of V$_{\rm B}^{-}$ spin defects in monoisotopic hexagonal boron nitride [0.0]
  Spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of flexible two-dimensional quantum sensing platforms. Here we rely on hBN crystals isotopically enriched with either $10$B or $11$B to investigate the isotope-dependent properties of a spin defect featuring a broadband photoluminescence signal in the near infrared.
  arXiv  Detail & Related papers  (2021-12-19T15:51:07Z)
• Generation of Spin Defects by Ion Implantation in Hexagonal Boron Nitride [0.0]
  Spin defects in two-dimensional materials are supposed to have unique superiority in quantum sensing since their atomatic thickness. Here, we demonstrate that the negatively boron charged vacancy (V$ _textB- $) with good spin properties in hexagonal boron nitride can be generated by ion implantation.
  arXiv  Detail & Related papers  (2021-05-25T15:59:15Z)
• Partitioning dysprosium's electronic spin to reveal entanglement in non-classical states [55.41644538483948]
  We report on an experimental study of entanglement in dysprosium's electronic spin. Our findings open up the possibility to engineer novel types of entangled atomic ensembles.
  arXiv  Detail & Related papers  (2021-04-29T15:02:22Z)
• Bright $\mathrm{\textit{ab-initio}}$ photoluminescence of NV+ in diamond [0.0]
  The NV+ centre in diamond has been traditionally treated as a dark state due to the experimental lack of an optical signature. Recent computational studies have shown that it is possible for the NV+ defect to have an excited state transition equivalent to that of the negatively charged (NV-) centre, but no PL predictions have been reported so far.
  arXiv  Detail & Related papers  (2021-04-09T09:10:21Z)
• A multiconfigurational study of the negatively charged nitrogen-vacancy center in diamond [55.58269472099399]
  Deep defects in wide band gap semiconductors have emerged as leading qubit candidates for realizing quantum sensing and information applications. Here we show that unlike single-particle treatments, the multiconfigurational quantum chemistry methods, traditionally reserved for atoms/molecules, accurately describe the many-body characteristics of the electronic states of these defect centers.
  arXiv  Detail & Related papers  (2020-08-24T01:49:54Z)
• Mechanical Decoupling of Quantum Emitters in Hexagonal Boron Nitride from Low-Energy Phonon Modes [52.77024349608834]
  Quantum emitters in hexagonal Boron Nitride (hBN) were recently reported to hol a homogeneous linewidth according to the Fourier-Transform limit up to room temperature. This unusual observation was traced back to decoupling from in-plane phonon modes which can arise if the emitter is located between two planes of the hBN host material.
  arXiv  Detail & Related papers  (2020-04-22T20:00:49Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.