Publications (23)
Spatially-resolved voltage-reversal due to Bernoulli potentials in dissipative BiSrCaCuO
Sharadh Jois, Gregory M. Stephen, Samuel W. LaGasse +3
We measure magneto-transport and critical currents in BiSrCaCuO Hall bar devices. Above critical current in an applied magnetic field, we observe longitudinal d…
Evidence of a Hybridized Topological State in Weyl Semimetal/Topological Insulator MnSn/BiSb Heterostructures
Ryan T. Van Haren, Gillian P Boyce, Gregory M. Stephen +4
We report magnetotransport evidence of a hybridized Weyl semimetal (WSM) Fermi arc/topological insulator (TI) surface state at the interface of a ferromagnetic MnSn…
Possible Room Temperature Ferromagnetism in Hydrogenated Carbon Nanotubes
Adam L. Friedman, Hyunkyung Chun, Yung Joon Jung +3
We find that ferromagnetism can be induced in carbon nanotubes (CNTs) by introducing hydrogen. Multiwalled CNTs grown inside porous alumina templates contain a large density of def…
Assembly of High-Performance van der Waals Devices Using Commercial Polyvinyl Chloride Films
Son T. Le, Jeffrey J. Schwartz, Tsegereda K. Esatu +5
Control over the position, orientation, and stacking order of two-dimensional (2D) materials within van der Waals heterostructures is crucial for applications in electronics, spint…
Intrinsic Spin Transport in a Topological Insulator Thin Film
Sharadh Jois, Gregory M. Stephen, Nick Blumenschein +3
Topological insulators (TIs) are intriguing materials for advanced computing applications based on spintronics because they can host robust spin effects. For instance, TIs have int…
Probing Magnetic Properties of RuO Heterostructures Through the Ferromagnetic Layer
Frank M. Abel, Subhash Bhatt, Shelby S. Fields +20
RuO has been proposed as the prototypical altermagnetic material. However, several reports have recently questioned its intrinsic magnetic ordering, leading to conflicting fi…
Charge to spin conversion in atomically thin bismuth
Wilson J. Yánez-Parreño, Alexander Vera, Sandra Santhosh +8
We report charge to spin conversion in a hybrid heterostructure comprised of atomically thin bismuth (Bi) confined between a silicon carbide (SiC) substrate and epitaxial graphene…
Quantum Monte Carlo and density functional theory study of strain and magnetism in 2D 1T-VSe with charge density wave states
Daniel Wines, Akram Ibrahim, Nishwanth Gudibandla +18
Two-dimensional (2D) 1T-VSe has prompted significant interest due to the discrepancies regarding alleged ferromagnetism (FM) at room temperature, charge density wave (CDW) stat…
Anomalous temperature-dependent spin-valley polarization in monolayer WS
Aubrey T. Hanbicki, George Kioseoglou, Marc Currie +4
Single layers of transition metal dichalcogenides (TMDs) are direct gap semiconductors with nondegenerate valley indices. An intriguing possibility for these materials is the use o…
High-speed metamagnetic resistive switching of FeRh through Joule heating
Nicholas A. Blumenschein, Gregory M. Stephen, Cory D. Cress +4
Due to its proximity to room temperature and demonstrated high degree of temperature tunability, the metamagnetic ordering transition in FeRh is attractive for novel high-performan…
Transport Enhancement and In Situ Control of Electronic Correlation via Photoinduced Modulation Doping of van der Waals Heterostructures
Collin R. Sanborn, Son T. Le, Thuc T. Mai +7
Modulation doping, a well-established technique for traditional semiconductor heterostructures, is a promising approach for tailoring carrier concentration in 2D materials devices.…
Electronic Hybridization of Large-Area Stacked Graphene Films
Jeremy T. Robinson, Scott W. Schmucker, C. Bogdan Diaconescu +5
Direct, tunable coupling between individually assembled graphene layers is a next step towards designer two-dimensional (2D) crystal systems, with relevance for fundamental studies…
Quantum Hall Transport Measurements of Lateral p-n Junctions Formed via Precise Spatial Photodoping of Graphene/hBN Heterostructures
Son T. Le, Thuc T. Mai, Maria F. Munoz +4
Doped semiconductors are a central and crucial component of all integrated circuits. By using a combination of white light and a focused laser beam, and exploiting hBN defect state…
Demonstrating magnetic memory in iron-rhodium structures using a quantum diamond microscope
Kristine V. Ung, Gregory M. Stephen, Nicholas A. Blumenschein +7
Iron-rhodium (FeRh) has a first-order phase transition near room temperature between antiferromagnetic (AFM) and ferromagnetic (FM) phases, making it a promising material for magne…
Spintronic Quantum Phase Transition in a Heterostructure with Giant Rashba Spin-Orbit Coupling
Jennifer E. DeMell, Ivan Naumov, Gregory M. Stephen +10
Mechanical stacking of two dissimilar materials often has surprising consequences for heterostructure behavior. In particular, a two-dimensional electron gas (2DEG) is formed in th…
Magnetotransport in graphene/Pb0.24Sn0.76Te heterostructures: finding a way to avoid catastrophe
Gregory M. Stephen, Ivan Naumov, Nicholas A. Blumenschein +9
While heterostructures are ubiquitous tools enabling new physics and device functionalities, the palette of available materials has never been richer. Combinations of two emerging…
Optical polarization and intervalley scattering in single layers of MoS2 and MoSe2
George Kioseoglou, Aubrey T. Hanbicki, Marc Currie +2
Single layers of MoS2 and MoSe2 were optically pumped with circularly polarized light and an appreciable polarization was initialized as the pump energy was varied. The circular po…
Direct Comparison of Static and Dynamic Measurements of Spin Generation in a Topological Insulator Thin Film
Vinay Sharma, Sharadh Jois, Ryan Van Haren +6
The competition between intrinsic spin-orbit physics, magnetic phenomena, and the quality of materials and interfaces governs the charge-to-spin conversion processes that are essen…
Prolegomena To Any Future Device Physics
Adam L. Friedman, Aubrey T. Hanbicki
For the last 60 years, advances in conventional computing platforms have been driven by the empirical notion known as Moores law. In its essence, Moores law is a ubiquitous descrip…
Magnetic Field-Mediated Superconducting Logic
Alexander J. Edwards, Son T. Le, Nicholas W. G. Smith +7
While superconductors are highly attractive for energy-efficient computing, fundamental limitations in their logic circuit integration have hindered scaling and led to increased en…
Differentiating anomalous and topological Hall effects using first-order reversal curve measurements
Gregory M. Stephen, Ryan T. Van Haren, Vinay Sharma +6
Next generation magnetic memories rely on novel magnetic phases for information storage. Novel spin textures such as skyrmions provide one possible avenue forward due to their topo…
Direct-Write Printed Contacts to Layered and 2D Materials
Sharadh Jois, Erica Lee, Philip Li +10
Advancements in fabrication methods have shaped new computing device technologies. Among these methods, depositing electrical contacts to the channel material is fundamental to dev…
Large-Area Intercalated 2D-Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque
Alexander Vera, Boyang Zheng, Wilson Yanez +19
A scalable platform to synthesize ultrathin heavy metals may enable high efficiency charge-to-spin conversion for next-generation spintronics. Here we report the synthesis of air-s…