Giovanni Scuri

All Publications

• Quantum critical electro-optic and piezo-electric nonlinearities. Science (New York, N.Y.) Anderson, C. P., Scuri, G., Chan, A., Eun, S., White, A. D., Ahn, G. H., Jilly, C., Safavi-Naeini, A., Van Gasse, K., Li, L., Vučković, J. 2025; 390 (6771): 394-399

  Abstract

  Although electro-optic (EO) nonlinearities are essential for many quantum and classical photonics applications, a major challenge is inefficient modulation in cryogenic environments. Guided by the connection between phase transitions and nonlinearity, we identify the quantum paraelectric perovskite SrTiO3 as a strong cryogenic EO [>500 picometers per volt (pm/V)] and piezo-electric material (>90 picocoulombs per newton) at T = 5 K, at frequencies to at least 1 megahertz. Furthermore, by tuning SrTiO3 toward quantum criticality, we more than double the EO and piezo-electric effects, demonstrating a linear Pockels coefficient above 1000 pm/V. Our results probe the link between quantum phase transitions, dielectric susceptibility, and nonlinearity, unlocking opportunities in cryogenic optical and mechanical systems and providing a framework for discovering new nonlinear materials.

  View details for DOI 10.1126/science.adx8657

  View details for PubMedID 41129638

• Epitaxially Defined Luttinger Liquids on MoS_{2} Bicrystals. Physical review letters Deng, B., Ahn, H., Wang, J., Moon, G., Han, C., Dongre, N., Lei, C., Scuri, G., Sung, J., Brutschea, E., Watanabe, K., Taniguchi, T., Zhang, F., Jo, M. H., Park, H. 2025; 134 (4): 046301

  Abstract

  A mirror twin boundary (MTB) in a transition metal dichalcogenide monolayer can host one-dimensional electron liquid of a topological nature with tunable interactions. Unfortunately, electrical characterization of such boundaries has been challenging due to the paucity of samples with large enough size and high quality. Here, we report the conductance measurements of individual MTBs in epitaxially grown monolayer molybdenum disulfide bicrystals that are tens of micrometers long. These MTBs exhibit power-law behaviors of conductance as a function of temperature and bias voltage up to room temperature, consistent with electrons tunneling into a Luttinger liquid. Transport measurements of two distinct types of MTBs reveal the critical role of the atomic-scale defects. This study demonstrates that MTBs in transition metal dichalcogenide monolayers provide an exciting new platform for studying the interplay between electronic interactions and topology.

  View details for DOI 10.1103/PhysRevLett.134.046301

  View details for PubMedID 39951581

• An electronic microemulsion phase emerging from a quantum crystal-to-liquid transition NATURE PHYSICS Sung, J., Wang, J., Esterlis, I., Volkov, P. A., Scuri, G., Zhou, Y., Brutschea, E., Taniguchi, T., Watanabe, K., Yang, Y., Morales, M. A., Zhang, S., Millis, A. J., Lukin, M. D., Kim, P., Demler, E., Park, H. 2025

  View details for DOI 10.1038/s41567-024-02759-8

  View details for Web of Science ID 001400769000001

• Single-Shot Readout and Weak Measurement of a Tin-Vacancy Qubit in Diamond PHYSICAL REVIEW X Rosenthal, E. I., Biswas, S., Scuri, G., Lee, H., Stein, A. J., Kleidermacher, H. C., Grzesik, J., Rugar, A. E., Aghaeimeibodi, S., Riedel, D., Titze, M., Bielejec, E. S., Choi, J., Anderson, C. P., Vu, J. 2024; 14 (4)

  View details for DOI 10.1103/PhysRevX.14.041008

  View details for Web of Science ID 001331721900001

• Controlled interlayer exciton ionization in an electrostatic trap in atomically thin heterostructures. Nature communications Joe, A. Y., Mier Valdivia, A. M., Jauregui, L. A., Pistunova, K., Ding, D., Zhou, Y., Scuri, G., De Greve, K., Sushko, A., Kim, B., Taniguchi, T., Watanabe, K., Hone, J. C., Lukin, M. D., Park, H., Kim, P. 2024; 15 (1): 6743

  Abstract

  Atomically thin semiconductor heterostructures provide a two-dimensional (2D) device platform for creating high densities of cold, controllable excitons. Interlayer excitons (IEs), bound electrons and holes localized to separate 2D quantum well layers, have permanent out-of-plane dipole moments and long lifetimes, allowing their spatial distribution to be tuned on demand. Here, we employ electrostatic gates to trap IEs and control their density. By electrically modulating the IE Stark shift, electron-hole pair concentrations above 2 × 1012 cm-2 can be achieved. At this high IE density, we observe an exponentially increasing linewidth broadening indicative of an IE ionization transition, independent of the trap depth. This runaway threshold remains constant at low temperatures, but increases above 20 K, consistent with the quantum dissociation of a degenerate IE gas. Our demonstration of the IE ionization in a tunable electrostatic trap represents an important step towards the realization of dipolar exciton condensates in solid-state optoelectronic devices.

  View details for DOI 10.1038/s41467-024-51128-9

  View details for PubMedID 39112505

  View details for PubMedCentralID PMC11306233

• An Inverse-Designed Nanophotonic Interface for Excitons in Atomically Thin Materials. Nano letters Gelly, R. J., White, A. D., Scuri, G., Liao, X., Ahn, G. H., Deng, B., Watanabe, K., Taniguchi, T., Vučković, J., Park, H. 2023

  Abstract

  Efficient nanophotonic devices are essential for applications in quantum networking, optical information processing, sensing, and nonlinear optics. Extensive research efforts have focused on integrating two-dimensional (2D) materials into photonic structures, but this integration is often limited by size and material quality. Here, we use hexagonal boron nitride (hBN), a benchmark choice for encapsulating atomically thin materials, as a waveguiding layer while simultaneously improving the optical quality of the embedded films. When combined with a photonic inverse design, it becomes a complete nanophotonic platform to interface with optically active 2D materials. Grating couplers and low-loss waveguides provide optical interfacing and routing, tunable cavities provide a large exciton-photon coupling to transition metal dichalcogenide (TMD) monolayers through Purcell enhancement, and metasurfaces enable the efficient detection of TMD dark excitons. This work paves the way for advanced 2D-material nanophotonic structures for classical and quantum nonlinear optics.

  View details for DOI 10.1021/acs.nanolett.3c02931

  View details for PubMedID 37695253

• Microwave Spin Control of a Tin-Vacancy Qubit in Diamond PHYSICAL REVIEW X Rosenthal, E. I., Anderson, C. P., Kleidermacher, H. C., Stein, A. J., Lee, H., Grzesik, J., Scuri, G., Rugar, A. E., Riedel, D., Aghaeimeibodi, S., Ahn, G., Van Gasse, K., Vuekovie, J. 2023; 13 (3)

  View details for DOI 10.1103/PhysRevX.13.031022

  View details for Web of Science ID 001122945200001