503 citations · 1.2k across the 38 of their papers we have counts for
39 papers
Quasicrystalline oxide interfaces by twisting SrTiO3 membranes
Shivasheesh Varshney, Sooho Choo, Huan Liu +34
Quasicrystals reveal that long-range order can exist without translational periodicity, but deterministic routes for designing strongly bonded quasicrystalline interfaces remain un…
Electron Beam Radiolysis-Assisted Growth of Rutile TiO2 Thin Films
Silu Guo, Nitin Sathish Kumar, Sreejith Nair +3
A new approach for growing crystalline thin films is developed that takes advantage of electron beam radiolysis being a constructive force to rearrange atoms into a crystalline str…
Efficiently gate-tunable ferromagnetism in ferromagnetic semiconductor-Dirac semimetal p-n heterojunctions
Emma Steinebronn, Saurav Islam, Abhinava Chatterjee +15
We use molecular beam epitaxy to develop a gate tunable p-n heterojunction that interfaces a canonical Dirac semimetal, CdAs, and a ferromagnetic semiconductor, InM…
Interface-engineered voltage-driven magnetic tunnel junctions with ultra-low-energy magnetization switching
Yu Zhang, Meng Xu, Bowei Zhou +9
Electric-field control of spin states offers a promising route to ultra-low-power, ultra-fast magnetization switching in spintronic devices such as magnetic tunnel junctions (MTJs)…
Hybrid MBE Route to Adsorption-Controlled Growth of BaTiO3 Membranes with Robust Polarization Switching
S. Choo, S. Varshney, J. Shah +5
Freestanding ferroelectric membranes are promising for flexible electronics, nonvolatile memory, photonics, and spintronics, but their synthesis is challenged by the need for repro…
Scalable Etch-Free Transfer of Low-Dimensional Materials from Metal Films to Diverse Substrates
Kentaro Yumigeta, Muhammed Yusufoglu, Mamun Sarker +12
Low-dimensional materials hold great promises for exploring emergent physical phenomena, nanoelectronics, and quantum technologies. Their synthesis often depends on catalytic metal…
Anomalous vortex Hall effect in a ferromagnet/superconductor heterostructure
Weideng Sun, Przemyslaw Swatek, Yihong Fan +5
The coexistence of superconductivity and ferromagnetism is a fascinating and complex phenomenon in condensed matter physics, as these two states are typically mutually exclusive du…
Intrinsic vs. Extrinsic Magnetic Transitions in Sr3Ru2O7 films
R. Choudhary, A. Rajapitamahuni, S. Guo +4
In scientific research, both positive and negative results play crucial role in advancing the field. Negative results provide valuable insights that can guide future experiments an…
Patterning of Fine Features on Material Surfaces Using a Ga Ion-Beam in a FIB-SEM
Supriya Ghosh, K. Andre Mkhoyan
Since an ion-beam is a viable attractive alternative to other material surface patterning techniques like an electron-beam, a study of the structure, composition and dimension of p…
Deep-ultraviolet transparent conducting SrSnO3 via heterostructure design
Fengdeng Liu, Zhifei Yang, David Abramovitch +4
Exploration and advancements in ultra-wide bandgap (UWBG) semiconductors are pivotal for next-generation high-power electronics and deep-ultraviolet (DUV) optoelectronics. A critic…
Rashba spin splitting-induced topological Hall effect in a Dirac semimetal-ferromagnetic semiconductor heterostructure
Saurav Islam, Emma Steinebronn, Kaijie Yang +8
We use a concerted theory-experiment effort to investigate the formation of chiral real space spin texture when the archetypal Dirac semimetal CdAs is interfaced with In$_{…
Site-Specific Plan-view (S)TEM Sample Preparation from Thin Films using a Dual-Beam FIB-SEM
Supriya Ghosh, Fengdeng Liu, Sreejith Nair +2
Plan-view transmission electron microscopy (TEM) samples are key to understand the atomic structure and associated properties of materials along their growth orientation, especiall…
Spin Hall conductivity in BiSb as an experimental test of bulk-boundary correspondence
Yongxi Ou, Wilson Yanez-Parreño, Yu-sheng Huang +9
Bulk-boundary correspondence is a foundational principle underlying the electronic band structure and physical behavior of topological quantum materials. Although it has been rigor…
Epitaxial growth and characterization of BiSb thin films on (0001) sapphire substrates
Yu-Sheng Huang, Saurav Islam, Yongxi Ou +4
We report the molecular beam epitaxy of Bi_1-xSb_x thin films () on (0001) sapphire substrates using a thin (Bi,Sb)Te buffer layer. Characterization of the…
Fast and Facile Synthesis Route to Epitaxial Oxide Membrane Using a Sacrificial Layer
Shivasheesh Varshney, Sooho Choo, Liam Thompson +7
The advancement in thin-film exfoliation for synthesizing oxide membranes has opened up new possibilities for creating artificially-assembled heterostructures with structurally and…
Robust negative longitudinal magnetoresistance and spin-orbit torque in sputtered Pt3Sn topological semimetal
Delin Zhang, Wei Jiang, Hwanhui Yun +11
Contrary to topological insulators, topological semimetals possess a nontrivial chiral anomaly that leads to negative magnetoresistance and are hosts to both conductive bulk states…
Thin film growth of the Weyl semimetal NbAs
Wilson Yanez, Yu-Sheng Huang, Supriya Ghosh +5
We report the synthesis and characterization of thin films of the Weyl semimetal NbAs grown on GaAs (100) and GaAs (111)B substrates. By choosing the appropriate substrate, we can…
Mending Cracks in Rutile TiO with Electron Beam
Silu Guo, Hwanhui Yun, Sreejith Nair +2
Restructuring of rutile TiO under electron beam irradiation driven by radiolysis was observed and analyzed using a combination of atomic-resolution imaging and electron energ…
Strain effect on the ground-state structure of Sr2SnO4 Ruddlesden-Popper oxides
Hwanhui Yun, Dominique Gautreau, K. Andre Mkhoyan +1
Ruddlesden-Popper (RP) oxides (ABO) comprised of perovskite (ABO) slabs can host a wider variety of structural distortions than their perovskite counte…
Room temperature spin-orbit torque efficiency in sputtered low-temperature superconductor delta-TaN
Przemyslaw Wojciech Swatek, Xudong Hang, Yihong Fan +14
In the course of searching for promising topological materials for applications in future topological electronics, we evaluated spin-orbit torques (SOTs) in high-quality sputtered…
Co-operative Influence of O2 and H2O in the Degradation of Layered Black Arsenic
Mayank Tanwar, Sagar Udyavara, Hwanhui Yun +3
Layered black arsenic (b-As) has recently emerged as a new anisotropic two-dimensional (2D) semiconducting material with applications in electronic devices. Understanding factors a…
Giant spin torque efficiency in naturally oxidized polycrystalline TaAs thin films
Wilson Yanez, Yongxi Ou, Run Xiao +6
We report the measurement of efficient charge-to-spin conversion at room temperature in Weyl semimetal/ferromagnet heterostructures with both oxidized and pristine interfaces. Poly…
Efficient Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane
Pengxiang Zhang, Chung-Tao Chou, Hwanhui Yun +4
Electrical manipulation of spin textures inside antiferromagnets represents a new opportunity for developing spintronics with superior speed and high device density. Injecting spin…
Challenges to magnetic doping of thin films of the Dirac semimetal CdAs
Run Xiao, Jacob T Held, Jeffrey Rable +4
Magnetic doping of topological quantum materials provides an attractive route for studying the effects of time-reversal symmetry breaking. Thus motivated, we explore the introducti…