Showing 2021 · cond-mat.mes-hallShow all

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cond-mat.mes-hall2021★ 8 cited

Origins of transverse voltages generated by applied thermal gradients and applied electric fields in ferrimagnetic-insulator/heavy-metal bilayers

Arnab Bose, Rakshit Jain, Jackson J. Bauer +3

We compare thermal-gradient-driven transverse voltages in ferrimagnetic-insulator/heavy-metal bilayers (Tm3Fe5O12/W and Tm3Fe5O12/Pt) to corresponding electrically-driven transvers…

cond-mat.mes-hall2021★ 2 cited

Disorder of Excitons and Trions in Monolayer MoSe2

Jue Wang, Christina Manolatou, Yusong Bai +3

The optical spectra of transition metal dichalcogenide (TMDC) monolayers are dominated by excitons and trions. Here we establish the dependences of these optical transitions on dis…

cond-mat.mes-hall2021★ 17 cited

Tight-Binding Bandstructure of and phase GaO and AlO

Yifan, Zhang, Mengren +3

Rapid design and development of the emergent ultra-wide bandgap semiconductors GaO and AlO requires a compact model of their electronic structures, accurate over th…

cond-mat.mes-hall2021★ 419 cited

Tilted spin current generated by the collinear antiferromagnet RuO2

Arnab Bose, Nathaniel J. Schreiber, Rakshit Jain +8

We report measurements demonstrating that when the Neel vector of the collinear antiferromagnet RuO2 is appropriately canted relative to the sample plane, the antiferromagnet gener…

cond-mat.mes-hall2021★ 23 cited

Quantum oscillations in 2D insulators induced by graphite gates

Jiacheng Zhu, Tingxin Li, Andrea F. Young +2

We demonstrate a mechanism for magnetoresistance oscillations in insulating states of two-dimensional (2D) materials arising from the interaction of the 2D layer and proximal graph…

cond-mat.mes-hall2021★ 153 cited

Maximizing Spin-Orbit Torque Generated by the Spin Hall Effect of Pt

Lijun Zhu, Daniel C. Ralph, Robert A Buhrman

Efficient generation of spin-orbit torques (SOTs) is central for the exciting field of spin-orbitronics. Platinum, the archetypal spin Hall material, has the potential to be an out…

cond-mat.mes-hall2021★ 572 cited

Quantum anomalous Hall effect from intertwined moiré bands

Tingxin Li, Shengwei Jiang, Bowen Shen +8

Electron correlation and topology are two central threads of modern condensed matter physics. Semiconductor moiré materials provide a highly tunable platform for studies of electro…

cond-mat.mes-hall2021★ 24 cited

High conductivity Polarization-induced 2D hole gases in Undoped GaN/AlN Heterojunctions enabled by Impurity Blocking Layers

Reet Chaudhuri, Zhen Chen, David Muller +2

High-conductivity undoped GaN/AlN 2D hole gases (2DHGs), the p-type dual of the AlGaN/GaN 2D electron gases (2DEGs), have offered valuable insights into hole transport in GaN and e…

cond-mat.mes-hall2021★ 4 cited

Resonant Measurement of Non-Reorientable Spin-Orbit Torque from a Ferromagnetic Source Layer Accounting for Dynamic Spin Pumping

Joseph A. Mittelstaedt, Daniel C. Ralph

Using a multilayer structure containing (cobalt detector layer)/(copper spacer)/(Permalloy source layer), we show experimentally how the non-reorientable spin-orbit torque generate…

cond-mat.mes-hall2021★ 48 cited

Spin dynamics slowdown near the antiferromagnetic critical point in atomically thin FePS3

Xiao-Xiao Zhang, Shengwei Jiang, Jinhwan Lee +3

Two-dimensional (2D) magnetic materials have attracted much recent interest with unique properties emerging at the few-layer limit. Beyond the reported impacts on the static magnet…

cond-mat.mes-hall2021★ 41 cited

Unveiling the mechanism of bulk spin-orbit torques within chemically disordered FePt single layers

Lijun Zhu, Daniel C. Ralph, Robert A. Buhrman

Recent discovery of spin-orbit torques (SOTs) within magnetic single-layers has attracted attention in the field of spintronics. However, it has remained elusive as to how to under…

cond-mat.mes-hall2021★ 98 cited

Valley-Polarized Quantum Anomalous Hall State in Moiré MoTe/WSe Heterobilayers

Ying-Ming Xie, Cheng-Ping Zhang, Jin-Xin Hu +2

Moiré heterobilayer transition metal dichalcogenides (TMDs) emerge as an ideal system for simulating the single-band Hubbard model and interesting correlated phases have been obser…

cond-mat.mes-hall2021★ 27 cited

Interfacial and bulk spin Hall contributions to field-like spin-orbit torque generated by Iridium

Sutapa Dutta, Arnab Bose, A. A. Tulapurkar +2

We present measurements of spin orbit torques generated by Ir as a function of film thickness in sputtered Ir/CoFeB and Ir/Co samples. We find that Ir provides a damping-like compo…

cond-mat.mes-hall2021★ 38 cited

Tunable exciton-optomechanical coupling in suspended monolayer MoSe2

Hongchao Xie, Shengwei Jiang, Daniel A. Rhodes +3

The strong excitonic effect in monolayer transition metal dichalcogenide (TMD) semiconductors has enabled many fascinating light-matter interaction phenomena. Examples include stro…

cond-mat.mes-hall2021★ 590 cited

Evidence of high-temperature exciton condensation in 2D atomic double layers

Zefang Wang, Daniel A. Rhodes, Kenji Watanabe +4

A Bose-Einstein condensate is the ground state of a dilute gas of bosons, such as atoms cooled to temperatures close to absolute zero. With much smaller mass, excitons (bound elect…

cond-mat.mes-hall2021★ 22 cited

Spin-Phonon Interaction in Yttrium Iron Garnet

Kevin S. Olsson, Jeongheon Choe, Martin Rodriguez-Vega +6

Spin-phonon interaction is an important channel for spin and energy relaxation in magnetic insulators. Understanding this interaction is critical for developing magnetic insulator-…

cond-mat.mes-hall2021★ 25 cited

Accurate Measurement of the Gap of Graphene/hBN Moiré Superlattice through Photocurrent Spectroscopy

Tianyi Han, Jixiang Yang, Qihang Zhang +5

Monolayer graphene aligned with hexagonal boron nitride (hBN) develops a gap at the charge neutrality point (CNP). This gap has previously been extensively studied by electrical tr…

cond-mat.mes-hall2021★ 18 cited

Resolving Discrepancies in Spin-Torque Ferromagnetic Resonance Measurements: Lineshape vs. Linewidth Analyses

Saba Karimeddiny, Daniel C. Ralph

When spin-orbit torques are measured using spin-torque ferromagnetic resonance (ST-FMR), two alternative ways of analyzing the results to extract the torque efficiencies -- linesha…

cond-mat.mes-hall2021★ 9 cited

Electrically tunable and reversible magnetoelectric coupling in strained bilayer graphene

Brian T. Schaefer, Katja C. Nowack

The valleys in hexagonal two-dimensional systems with broken inversion symmetry carry an intrinsic orbital magnetic moment. Despite this, such systems possess zero net magnetizatio…

cond-mat.mes-hall2021★ 18 cited

Scanning SQUID microscopy in a cryogen-free dilution refrigerator

D. Low, G. M. Ferguson, Alexander Jarjour +4

We report a scanning superconducting quantum interference device (SQUID) microscope in a cryogen-free dilution refrigerator with a base temperature at the sample stage of at least…

cond-mat.mes-hall2021★ 7 cited

Nanoscale magnetization and current imaging using scanning-probe magneto-thermal microscopy

Chi Zhang, Jason M. Bartell, Jonathan C. Karsch +2

Magnetic microscopy that combines nanoscale spatial resolution with picosecond scale temporal resolution uniquely enables direct observation of the spatiotemporal magnetic phenomen…

cond-mat.mes-hall2021★ 167 cited

The 2021 Quantum Materials Roadmap

Feliciano Giustino, Jin Hong Lee, Felix Trier +26

In recent years, the notion of Quantum Materials has emerged as a powerful unifying concept across diverse fields of science and engineering, from condensed-matter and cold atom ph…

cond-mat.mes-hall2021★ 24 cited

Spin-Polarized Fractional Corner Charges and Their Photonic Realization

Ran Gladstein Gladstone, Minwoo Jung, Gennady Shvets

We demonstrate that a spin degree of freedom can introduce additional texture to higher order topological insulators (HOTIs), manifesting itself in novel topological invariants, ph…

cond-mat.mes-hall2021★ 7 cited

Emergent chirality in a polar meron to skyrmion phase transition

Yu-Tsun Shao, Sujit Das, Zijian Hong +10

Polar skyrmions are predicted to emerge from the interplay of elastic, electrostatic and gradient energies, in contrast to the key role of the anti-symmetric Dzyalozhinskii-Moriya…