Tootfinder

Solid-State Optical Magnetometer: Next-Generation Approach to Sub-Nanotesla Magnetic Sensing
O. Daneshmandi, M. Alidadi, Y. M. Banad, S. S. Sharif
https://arxiv.org/abs/2506.18111

Solid-State Optical Magnetometer: Next-Generation Approach to Sub-Nanotesla Magnetic Sensing
We present a Solid-State Optical Magnetometer (SOM) based on black phosphorus (BP) multilayers, offering a compact, scalable, and highly sensitive alternative to traditional atomic-based magnetometers. Utilizing BP's intrinsic linear dichroism in a metasurface cavity, the SOM achieves sub-nanotesla precision and vector magnetic field sensing. BP enhances light-matter interactions, enabling tunable optical responses driven by Lorentz force-induced cavity deformation. Optimized metasurface unit c…

Nondegenerate actions on Hilbert C*-modules
Elias Katsoulis, Christopher Ramsey
https://arxiv.org/abs/2507.17104 https://arxiv.org/pd…

Nondegenerate actions on Hilbert C*-modules
Let X be a (right) Hilbert C*-module and let B be a C*-algebra acting on X from the left via adjointable operators. In this note we establish the equivalence of two notions of nondegeneracy for such an action of B on X. Furthermore, we explain how techniques from an earlier paper of Kim can be used to give a short proof of a recent result of Dessi, Kakariadis and Paraskevas.

Weighted $L^2$ restriction and comparison of nondegeneracy conditions for quadratic manifolds of arbitrary codimensions
Zhenbin Cao, Jingyue Li, Changxing Miao, Yixuan Pang
https://arxiv.org/abs/2506.18657

Weighted $L^2$ restriction and comparison of nondegeneracy conditions for quadratic manifolds of arbitrary codimensions
We systematically study weighted $L^2$ restriction for quadratic manifolds of arbitrary codimensions by sharp uniform Fourier decay estimates and a refinement of the Du-Zhang method. Comparison with prior results is also discussed. In addition,we obtain an almost complete relation diagram for all existing nondegeneracy conditions for quadratic manifolds of arbitrary codimensions. These conditions come from various topics in harmonic analysis related to "curvature": Fourier restriction, decoupli…

Shaping Boundaries to Control and Transport Topological Defects in Colloidal Nematic Liquid Crystals
Gerardo Campos-Villalobos, Andr\'e F. V. Matias, Ethan I. L. Jull, Lisa Tran, Marjolein Dijkstra
https://arxiv.org/abs/2506.18664

Shaping Boundaries to Control and Transport Topological Defects in Colloidal Nematic Liquid Crystals
Anisotropic rod-like particles form liquid crystalline phases with varying degrees of orientational and translational order. When confined geometrically, these phases can give rise to topological defects, which can be selected and controlled by tuning how the rods align near boundaries, known as anchoring. While anchoring in molecular liquid crystals can be controlled through surface functionalization, this approach is not easily applicable to microscale colloidal systems, which have so far bee…

Atomic-scale imaging of electronic nematicity in ferropnictides
Qiang-Jun Cheng, Yong-Wei Wang, Ming-Qiang Ren, Ze-Xian Deng, Cong-Cong Lou, Xu-Cun Ma, Qi-Kun Xue, Can-Li Song
https://arxiv.org/abs/2506.16282

Atomic-scale imaging of electronic nematicity in ferropnictides
Electronic nematicity, a correlated state characterized by broken rotational symmetry, has been recognized as a ubiquitous feature intertwined with unconventional electron pairing in various iron-based superconductors. Here we employ spectroscopic-imaging scanning tunneling microscopy to visualize atomic-scale electronic nematicity directly on FeAs planes of a prototypical ferropnictide BaFe$_2$As$_2$. Spatially, the nematic order appears as 4$a_{\textrm{Fe}}$-spaced stripes ($a_{\textrm{Fe}} \…

Observation of a spin-textured nematic Kondo lattice
Yu-Xiao Jiang, Zi-Jia Cheng, Qiaozhi Xu, Md Shafayat Hossain, Xian P. Yang, Jia-Xin Yin, Maksim Litskevich, Tyler A. Cochran, Byunghoon Kim, Eduardo Miranda, Sheng Ran, Rafael M. Fernandes, M. Zahid Hasan
https://arxiv.org/abs/2506.16642…

Observation of a spin-textured nematic Kondo lattice
The Kondo lattice mode, as one of the most fundamental models in condensed matter physics, has been employed to describe a wide range of quantum materials such as heavy fermions, transition metal dichalcogenides and two-dimensional Moire systems. Discovering new phases on Kondo lattice and unveiling their mechanisms are crucial to the understanding of strongly correlated systems. Here, in a layered Kondo magnet USbTe, we observe a spin-textured nematic state and visualize a heavy electronic liq…

Machine Learning-Assisted Nano-imaging and Spectroscopy of Phase Coexistence in a Wide-Bandgap Semiconductor
Alyssa Bragg, Fengdeng Liu, Zhifei Yang, Nitzan Hirshberg, Madison Garber, Brayden Lukaskawcez, Liam Thompson, Shane MacDonald, Hayden Binger, Devon Uram, Ashley Bucsek, Bharat Jalan, Alexander McLeod
https://arxiv.org/abs/2507.1767…

Machine Learning-Assisted Nano-imaging and Spectroscopy of Phase Coexistence in a Wide-Bandgap Semiconductor
Wide bandgap semiconductors with high room temperature mobilities are promising materials for high-power electronics. Stannate films provide wide bandgaps and optical transparency, although electron-phonon scattering can limit mobilities. In SrSnO3, epitaxial strain engineering stabilizes a high-mobility tetragonal phase at room temperature, resulting in a threefold increase in electron mobility among doped films. However, strain relaxation in thicker films leads to nanotextured coexistence of …

Spin-orbit crossover and the origin of magnetic torque in kagome metals
Mathias S. Scheurer, Harley D. Scammell
https://arxiv.org/abs/2507.15527 https://…

Spin-orbit crossover and the origin of magnetic torque in kagome metals
Recent experiments on the kagome metal Cs$_3$Sb$_5$ reveal a curious phase transition-like feature: a nematic magnetic torque response that abruptly sets in at $T_τ\approx 130$~K, above the known charge density wave transition at $T_\text{CDW} \approx 100$~K. Counterintuitively, elastoresistance measurements--a standard probe of nematicity--show no corresponding signal, ruling out a nematic phase transition and placing strong constraints on possible explanations. Beyond nematicity, the torque …

Ferroelectric Nematic Liquid Crystal-Based Silicon Photonic Modulator Demonstrated at 102 Gbit/s PAM-4
Li-Yuan Chiang, Gianlorenzo Masini, Rih-You Chen, Chirag Patel, Pavel Savechenkov, Yi-Jen Chiu, Cory Pecinovsky, Jason W. Sickler
https://arxiv.org/abs/2507.14724

Ferroelectric Nematic Liquid Crystal-Based Silicon Photonic Modulator Demonstrated at 102 Gbit/s PAM-4
We present the first demonstration of a hybrid integrated silicon and ferroelectric nematic liquid crystal modulator achieving 102~Gbit per second PAM-4 modulation. Operating within the C-band at a 3.5 V DC bias, this Pockels-based Mach-Zehnder modulator exhibits a $V_πL_\mathrm{AC}$ of 0.3 V$\cdot$cm.

Space-time crystals from particle-like topological solitons
Hanqing Zhao, Ivan I. Smalyukh
https://arxiv.org/abs/2507.16972 https://arxiv.org/pdf/2507.1697…

Space-time crystals from particle-like topological solitons
Time crystals are unexpected states of matter that spontaneously break time translation symmetry either in a discrete or continuous manner. However, spatially-mesoscale space-time crystals that break both the space and time symmetries have not been reported. Here we report a continuous space-time crystal in a nematic liquid crystal driven by ambient-power, constant-intensity unstructured light. Our numerically constructed 4-dimensional configurations exhibit good agreement with these experiment…