Nishkarsh Agarwal
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View article: Nanoscale Polar Landscapes in Quantum Paraelectric SrTiO3
Nanoscale Polar Landscapes in Quantum Paraelectric SrTiO3 Open
SrTiO3 is a textbook quantum paraelectric, with ferroelectricity purportedly suppressed by quantum fluctuations of ionic positions down to the lowest temperatures. The precise real space structure of SrTiO3 at low temperature, however, has…
View article: Melting point depression of charge density wave in 1T-TiSe$_2$ due to size effects
Melting point depression of charge density wave in 1T-TiSe$_2$ due to size effects Open
Classical nucleation theory predicts size-dependent nucleation and melting due to surface and confinement effects at the nanoscale. In correlated electronic states, observation of size-dependent nucleation and melting is rarely reported, l…
View article: Liquid Helium Cryogenic TEM below 1 Å
Liquid Helium Cryogenic TEM below 1 Å Open
Next-generation cryogenic transmission electron microscopes (TEM) aim to achieve high-resolution imaging at ultracold sample temperatures (< 90 K) and over extended hold times. Lower temperatures enable atomic-scale characterization with i…
View article: Intertwined polar, chiral, and ferro-rotational orders in a rotation-only insulator
Intertwined polar, chiral, and ferro-rotational orders in a rotation-only insulator Open
Intertwined orders refer to strongly coupled and mutually dependent orders that coexist in correlated electron systems, often underpinning key physical properties of the host materials. Among them, polar, chiral, and ferro-rotational order…
View article: Ultracold cryogenic TEM with liquid helium and high stability
Ultracold cryogenic TEM with liquid helium and high stability Open
Cryogenic transmission electron microscopy has revolutionized structural biology and materials science. To image below liquid nitrogen temperatures, various liquid helium stages have been constructed but have proven to be complex and unsta…
View article: Chiral quantum magnets with optically and catalytically active spin ladders
Chiral quantum magnets with optically and catalytically active spin ladders Open
Chiral quantum magnets with spin-states separated by a large energy gap are technologically attractive but difficult to realize. Geometrically frustrated topological states with nanoscale chirality may offer a chemical pathway to such mate…
View article: Tunable symmetry breaking in a hexagonal-stacked moiré magnet
Tunable symmetry breaking in a hexagonal-stacked moiré magnet Open
Symmetry plays a central role in defining magnetic phases, making tunable symmetry breaking across magnetic transitions highly desirable for discovering non-trivial magnetism. Magnetic moiré superlattices, formed by twisting two-dimensiona…
View article: Melting of Charge Density Waves in Low Dimensions
Melting of Charge Density Waves in Low Dimensions Open
Charge density waves (CDWs) are collective electronic states that can reshape and melt, even while confined within a rigid atomic crystal. In two dimensions, melting is predicted to be distinct, proceeding through partially ordered nematic…
View article: Visualizing Field-free Deterministic Magnetic Switching of all-van der Waals Spin-Orbit Torque System Using Spin Ensembles in Hexagonal Boron Nitride
Visualizing Field-free Deterministic Magnetic Switching of all-van der Waals Spin-Orbit Torque System Using Spin Ensembles in Hexagonal Boron Nitride Open
Recently, optically active spin defects embedded in van der Waals (vdW) crystals have emerged as a transformative quantum sensing platform to explore cutting-edge materials science and quantum physics. Taking advantage of excellent solid-s…
View article: Observation of stacking engineered magnetic phase transitions within moiré supercells of twisted van der Waals magnets
Observation of stacking engineered magnetic phase transitions within moiré supercells of twisted van der Waals magnets Open
View article: Endotaxial stabilization of 2D charge density waves with long-range order
Endotaxial stabilization of 2D charge density waves with long-range order Open
Charge density waves are emergent quantum states that spontaneously reduce crystal symmetry, drive metal-insulator transitions, and precede superconductivity. In low-dimensions, distinct quantum states arise, however, thermal fluctuations …
View article: Ultra-Cold Cryogenic TEM with Liquid Helium and High Stability
Ultra-Cold Cryogenic TEM with Liquid Helium and High Stability Open
Cryogenic transmission electron microscopy has revolutionized structural biology and materials science, but achieving temperatures below the boiling point of liquid nitrogen remains a long-standing aspiration. We introduce an ultra-cold li…
View article: Revealing intrinsic domains and fluctuations of moiré magnetism by a wide-field quantum microscope
Revealing intrinsic domains and fluctuations of moiré magnetism by a wide-field quantum microscope Open
Moiré magnetism featured by stacking engineered atomic registry and lattice interactions has recently emerged as an appealing quantum state of matter at the forefront of condensed matter physics research. Nanoscale imaging of moiré magnets…
View article: Endotaxial Stabilization of 2D Charge Density Waves with Long-range Order
Endotaxial Stabilization of 2D Charge Density Waves with Long-range Order Open
Charge density waves are emergent quantum states that spontaneously reduce crystal symmetry, drive metal-insulator transitions, and precede superconductivity. In low-dimensions, distinct quantum states arise, however, thermal fluctuations …
View article: Native Intercalant Order in TaS2 Achieved Through <i>in situ</i> Thermal Heating
Native Intercalant Order in TaS2 Achieved Through <i>in situ</i> Thermal Heating Open
View article: Endotaxial Polytype Engineering: Enhancement of Incommensurate Charge Density Waves in TaS2
Endotaxial Polytype Engineering: Enhancement of Incommensurate Charge Density Waves in TaS2 Open
Journal Article Endotaxial Polytype Engineering: Enhancement of Incommensurate Charge Density Waves in TaS2 Get access Suk Hyun Sung, Suk Hyun Sung Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, Uni…
View article: Liquid Helium TEM Sample Holder with High Stability and Long Hold Times
Liquid Helium TEM Sample Holder with High Stability and Long Hold Times Open
Journal Article Liquid Helium TEM Sample Holder with High Stability and Long Hold Times Get access Emily Rennich, Emily Rennich Rowland Institute at Harvard University, Cambridge, MA, United StatesDepartment of Mechanical Engineering, Univ…
View article: Revealing intrinsic domains and fluctuations of moiré magnetism by a wide-field quantum microscope
Revealing intrinsic domains and fluctuations of moiré magnetism by a wide-field quantum microscope Open
Moiré magnetism featured by stacking engineered atomic registry and lattice interactions has recently emerged as an appealing quantum state of matter at the forefront condensed matter physics research. Nanoscale imaging of moiré magnets is…
View article: Ferrorotational domain walls revealed by electric quadrupole second harmonic generation microscopy
Ferrorotational domain walls revealed by electric quadrupole second harmonic generation microscopy Open
Domain walls are ubiquitous in materials that undergo phase transitions driven by spontaneous symmetry breaking. Domain walls in ferroics and multiferroics have received tremendous attention recently due to their emergent properties distin…
View article: Data for Endotaxial Stabilization of 2D Charge Density Waves with Long-range Order
Data for Endotaxial Stabilization of 2D Charge Density Waves with Long-range Order Open
Charge density waves are emergent quantum states that spontaneously reduce crystal symmetry, drive metal-insulator transitions, and precede superconductivity. In low-dimensions, distinct quantum states arise, however, thermal fluctuations …
View article: Ferro-rotational domain walls revealed by electric quadrupole second harmonic generation microscopy
Ferro-rotational domain walls revealed by electric quadrupole second harmonic generation microscopy Open
Domain walls are ubiquitous in materials that undergo phase transitions driven by spontaneous symmetry breaking. Domain walls in ferroics and multiferroics have received tremendous attention recently due to their emergent properties distin…
View article: Accessing Chemically Ordered Phases in TaS2 via High Temperature In-situ TEM
Accessing Chemically Ordered Phases in TaS2 via High Temperature In-situ TEM Open
Journal Article Accessing Chemically Ordered Phases in TaS2 via High Temperature In-situ TEM Get access Nishkarsh Agarwal, Nishkarsh Agarwal Department of Materials Science and Engineering, University of Michigan, Ann Arbor, United States …