1.5k citations · 4.2k across the 40 of their papers we have counts for
41 papers
Size-Dependent Band-Tail Localization in Oxide Semiconductors Revealed by Direct Density-of-States Mapping
Chang Niu, Kisoo Nam, Aravindh Shankar +5
Disorder-induced localization is expected to become increasingly important as amorphous oxide semiconductor transistors are scaled toward low-dimensional channels, yet the electron…
Acoustic-phonon-driven spin-lattice relaxation of the hBN boron vacancy in the sub-THz regime
Priyo Adhikary, Pramey Upadhyaya
The negatively charged boron vacancy center in hexagonal boron nitride is a premier candidate for quantum sensing, yet its performance is critically limited by longitudinal spin-la…
Noncollinear spin textures and 90° domain walls in twisted XY magnets
Guanghui Cheng, Shiva T. Konakanchi, Andres E. Llacsahuanga Allcca +8
Twisted moiré magnets are promising in exploring noncollinear magnetic phases, yet current experimental studies have been restricted to uniaxial magnets, limiting the accessible ph…
Exploiting Negative Capacitance for Unconventional Coulomb Engineering
Aravindh Shankar, Pramey Upadhyaya, Supriyo Datta
The many-body ground state of a two-dimensional electron system can be tuned by Coulomb engineering through control of the dielectric environment. However, in conventional dielectr…
Octupole-driven spin torque switching of antiferromagnetic tunnel junctions
Jaimin Kang, Mohammad Hamdi, Shun Kong Cheung +28
Magnetic tunnel junctions (MTJs) based on ferromagnets are canonical devices in spintronics, with wide-ranging applications in data storage, computing, and sensing. They simultaneo…
Sub-Terahertz Spin Relaxation Dynamics of Boron-Vacancy Centers in Hexagonal Boron Nitride
Abhishek Bharatbhai Solanki, Yueh-Chun Wu, Hamza Ather +12
Quantum sensors based on spin-defect relaxation have become powerful tools for detecting faint magnetic signals, yet their operation has remained largely confined to low magnetic f…
Emergent Synaptic Plasticity from Tunable Dynamics of Probabilistic Bits
Sagnik Banerjee, Shiva T. Konakanchi, Supriyo Datta +1
Probabilistic (p-) computing, which leverages the stochasticity of its building blocks (p-bits) to solve a variety of computationally hard problems, has recently emerged as a promi…
Electrically Tunable Picosecond-scale Octupole Fluctuations in Chiral Antiferromagnets
Shiva T. Konakanchi, Sagnik Banerjee, Mohammad M. Rahman +4
We present a theory for the relaxation time of the octupole order parameter in nanoscale chiral antiferromagnets (AFMs) coupled to thermal baths and spin injection sources. Using s…
Discovery of a high-temperature antiferromagnetic state and transport signatures of exchange interactions in a Bi2Se3/EuSe heterostructure
Ying Wang, Valeria Lauter, Olga Maximova +10
Spatial confinement of electronic topological surface states (TSS) in topological insulators poses a formidable challenge because TSS are protected by time-reversal symmetry. In pr…
A Platform for Braiding Majorana Modes with Magnetic Skyrmions
Shiva T. Konakanchi, Jukka I. Väyrynen, Yong P. Chen +2
After a decade of intense theoretical and experimental efforts, demonstrating braiding of Majorana modes remains an unsolved problem in condensed matter physics due to platform spe…
Greatly Enhanced Emission from Spin Defects in Hexagonal Boron Nitride Enabled by a Low-Loss Plasmonic Nano-Cavity
Xiaohui Xu, Abhishek. B. Solanki, Demid Sychev +13
Two-dimensional hexagonal boron nitride (hBN) has been known to host a variety of quantum emitters with properties suitable for a broad range of quantum photonic applications. Amon…
Electrically Active Domain Wall Magnons in Layered van der Waals Antiferromagnets
Mohammad Mushfiqur Rahman, Avinash Rustagi, Yaroslav Tserkovnyak +1
We study theoretically domain wall (DW) magnons-elementary collective excitations of magnetic DWs -- in easy-axis layered van der Waals (vdW) antiferromagnets, where they behave as…
Electrically tunable moiré magnetism in twisted double bilayers of chromium triiodide
Guanghui Cheng, Mohammad Mushfiqur Rahman, Andres Llacsahuanga Allcca +10
Moiré superlattices in van der Waals structures can be used to control the electronic properties of the material and lead to emergent correlated and topological phenomena. Its firs…
Correlative nanoscale imaging of strained hBN spin defects
David Curie, Jaron T. Krogel, Lukas Cavar +11
Spin defects like the negatively charged boron vacancy color center () in hexagonal boron nitride (hBN) may enable new forms of quantum sensing with near-surface defects in…
Manipulating quantum impurity spins via dynamical modes of nanomagnets
Avinash Rustagi, Shivam Kajale, Pramey Upadhyaya
Quantum impurity (QI) spins offer promising information processing and sensing applications by harnessing up to room-temperature quantum coherence. Challenged by the requirement of…
Emergence of electric-field-tunable interfacial ferromagnetism in 2D antiferromagnet heterostructures
Guanghui Cheng, Mohammad Mushfiqur Rahman, Zhiping He +12
Van der Waals (vdW) magnet heterostructures have emerged as new platforms to explore exotic magnetic orders and quantum phenomena. Here, we study heterostructures of layered antife…
High-contrast plasmonic-enhanced shallow spin defects in hexagonal boron nitride for quantum sensing
Xingyu Gao, Boyang Jiang, Andres E. Llacsahuanga Allcca +9
The recently discovered spin defects in hexagonal boron nitride (hBN), a layered van der Waals material, have great potential in quantum sensing. However, the photoluminescence and…
Spin orbit torque controlled stochastic oscillators with synchronization and frequency tunability
Punyashloka Debashis, Aman K. Maskay, Pramey Upadhyaya +1
Stochastic oscillators based on emerging nanodevices are attractive because of their ultra-low power requirement and ability to exhibit stochastic resonance, a phenomenon where syn…
Electric field control of interaction between magnons and quantum spin defects
Abhishek Bharatbhai Solanki, Simeon I. Bogdanov, Avinash Rustagi +10
Hybrid systems coupling quantum spin defects (QSD) and magnons can enable unique spintronic device functionalities and probes for magnetism. Here, we add electric field control of…
Sensing chiral magnetic noise via quantum impurity relaxometry
Avinash Rustagi, Iacopo Bertelli, Toeno van der Sar +1
We present a theory for quantum impurity relaxometry of magnons in thin films, exhibiting quantitative agreement with recent experiments without needing arbitrary scale factors use…
Coupled spin-charge dynamics in magnetic van der Waals heterostructures
Avinash Rustagi, Abhishek Solanki, Yaroslav Tserkovnyak +1
We present a phenomenological theory for coupled spin-charge dynamics in magnetic van der Waals heterostructures. The system studied consists of a layered antiferromagnet inserted…
Experimental observation of coupled valley and spin Hall effect in p-doped WSe2 devices
Terry Y. T. Hung, Avinash Rustagi, Shengjiao Zhang +2
Giant spin Hall effect (GSHE) has been observed in heavy metal materials such as Ta, Pt, and W, where spins are polarized in the surface plane and perpendicular to the charge curre…
Subnanosecond Fluctuations in Low-Barrier Nanomagnets
Jan Kaiser, Avinash Rustagi, Kerem Y. Camsari +3
Fast magnetic fluctuations due to thermal torques have useful technological functionality ranging from cryptography to probabilistic computing. The characteristic time of fluctuati…
Self-stabilizing exchange-mediated spin transport
T. Schneider, D. Hill, A. Kákay +9
Long-range spin transport in magnetic systems can be achieved by means of exchange-mediated spin textures with robust topological winding -- a phenomenon referred to as spin superf…