Showing 2020 · cond-mat.mes-hallShow all

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cond-mat.mes-hall2020★ 1 cited

GaN/AlGaN 2DEGs in the quantum regime: Magneto-transport and photoluminescence to 60 tesla

S. A. Crooker, M. Lee, R. D. McDonald +9

Using high magnetic fields up to 60 T, we report magneto-transport and photoluminescence (PL) studies of a two-dimensional electron gas (2DEG) in a GaN/AlGaN heterojunction grown b…

cond-mat.mes-hall2020★ 25 cited

Severe Dirac Mass Gap Suppression in Sb_2Te_3-based Quantum Anomalous Hall Materials

Yi Xue Chong, Xiaolong Liu, Rahul Sharma +5

Quantum anomalous Hall (QAH) effect appears in ferromagnetic topological insulators (FMTI) when a Dirac mass gap opens in the spectrum of the topological surface states (SS). Unacc…

cond-mat.mes-hall2020★ 27 cited

Absence of significant spin current generation in Ti/FeCoB bilayers with strong interfacial spin-orbit coupling

Lijun Zhu, Robert A. Buhrman

After one decade of the intensive theoretical and experimental explorations, whether interfacial spin-orbit coupling (ISOC) at metallic magnetic interfaces can effectively generate…

cond-mat.mes-hall2020★ 47 cited

Exact Higher-order Bulk-boundary Correspondence of Corner-localized States

Minwoo Jung, Yang Yu, Gennady Shvets

We demonstrate that the presence of a localized state at the corner of an insulating domain is not always a predictor of a certain non-trivial higher-order topological invariant, e…

cond-mat.mes-hall2020★ 6 cited

Majorana Zero Modes in Cylindrical Semiconductor Quantum Wire

Chao Lei, Guru Khalsa, Jiangfeng Du +1

We study Majorana zero modes properties in cylindrical cross-section semiconductor quantum wires based on the theory and a discretized lattice model. Within this model,…

cond-mat.mes-hall2020★ 32 cited

Exciton-Trion-Polaritons in Two-Dimensional Materials

Farhan Rana, Okan Koksal, Minwoo Jung +3

We present a many-body theory for exciton-trion-polaritons in doped two-dimensional materials. Exciton-trion-polaritons are robust coherent hybrid excitations involving excitons, t…

cond-mat.mes-hall2020★ 18 cited

Many-body theory of radiative lifetimes of exciton-trion superposition states in doped two-dimensional materials

Farhan Rana, Okan Koksal, Minwoo Jung +2

Optical absorption and emission spectra of doped two-dimensional (2D) materials exhibit sharp peaks that are often identified with pure excitons and pure trions (or charged exciton…

cond-mat.mes-hall2020★ 122 cited

Topolectric circuits: Theory and construction

Junkai Dong, Vladimir Juricic, Bitan Roy

We highlight a general theory to engineer arbitrary Hermitian tight-binding lattice models in electrical LC circuits, where the lattice sites are replaced by the electrical nodes,…

cond-mat.mes-hall2020★ 235 cited

Stripe phases in WSe2/WS2 moiré superlattices

Chenhao Jin, Zui Tao, Tingxin Li +10

Stripe phases, in which the rotational symmetry of charge density is spontaneously broken, occur in many strongly correlated systems with competing interactions. One representative…

cond-mat.mes-hall2020★ 64 cited

Transverse and Longitudinal Spin-Torque Ferromagnetic Resonance for Improved Measurements of Spin-Orbit Torques

Saba Karimeddiny, Joseph A. Mittelstaedt, Robert A. Buhrman +1

Spin-torque ferromagnetic resonance (ST-FMR) is a common method used to measure spin-orbit torques (SOTs) in heavy metal/ferromagnet bilayer structures. In the course of a measurem…

cond-mat.mes-hall2020★ 3 cited

A unified ballistic transport relation for anisotropic dispersions and generalized dimensions

Jashan Singhal, Debdeep Jena

An analytical formula is derived for particle and energy densities of fermions and bosons, and their ballistic momentum and energy currents for anisotropic energy dispersions in ge…

cond-mat.mes-hall2020★ 4 cited

Operando Control of Skyrmion Density in a Lorentz Transmission Electron Microscope with Current Pulses

Albert M. Park, Zhen Chen, Xiyue S. Zhang +3

Magnetic skyrmions hold promise for spintronic devices. To explore the dynamical properties of skyrmions in devices, a nanoscale method to image spin textures in response to a stim…

cond-mat.mes-hall2020★ 54 cited

Role of Dirac nodal lines and strain on the high spin Hall conductivity of epitaxial IrO2 thin films

Arnab Bose, Jocienne N. Nelson, Xiyue S. Zhang +6

Since the discovery of a 'giant' spin Hall effect (SHE) in certain heavy metal elements there has been an intense effort to identify and develop new and technologically viable, hea…

cond-mat.mes-hall2020★ 16 cited

Exchange splitting and exchange-induced non-reciprocal photonic behavior of graphene in CrI3-graphene vdW heterostructures

Alexander M. Holmes, Samaneh Pakniyat, S. Ali Hassani Gangaraj +3

The exchange splitting and resulting electromagnetic response of graphene in a monolayer chromium triiodide(CrI3) graphene van der Waals(vdW) heterostructure are considered using a…

cond-mat.mes-hall2020★ 14 cited

Light-dependent Impedance Spectra and Transient Photoconductivity in a Ruddlesden-Popper 2D Lead-halide Perovskite Revealed by Electrical Scanned Probe Microscopy and Accompanying Theory

Ali Moeed Tirmzi, Ryan P. Dwyer, Fangyuan Jiang +1

Electric force microscopy was used to record the light-dependent impedance spectrum and the probe transient photoconductivity of a film of butylammonium lead iodide, BAPbI$_{…

cond-mat.mes-hall2020

Spectral and spatial isolation of single WSe quantum emitters using hexagonal boron nitride wrinkles

Raphaël S. Daveau, Tom Vandekerckhove, Arunabh Mukherjee +5

Monolayer WSe hosts bright single-photon emitters. Because of its compliance, monolayer WSe conforms to patterned substrates without breaking, thus creating the potential f…

cond-mat.mes-hall2020★ 7 cited

Sub-Nanosecond Spin-Transfer Torque in an Ensemble of Superparamagnetic-Like Nanomagnets

Satoru Emori, Christoph Klewe, Jan-Michael Schmalhorst +14

Spin currents can exert spin-transfer torques on magnetic systems even in the limit of vanishingly small net magnetization, as is the case for antiferromagnets. Here, we experiment…

cond-mat.mes-hall2020★ 51 cited

A Many-Body Theory of the Optical Conductivity of Excitons and Trions in Two-Dimensional Materials

Farhan Rana, Okan Koksal, Christina Manolatou

The optical spectra of two dimensional (2D) materials exhibit sharp absorption peaks that are commonly identified with exciton and trions (or charged excitons). In this paper, we s…

cond-mat.mes-hall2020

Application of Jordan Decomposition to Non-Hermitian Lattice Models with Spectrally-Isolated Lower Dimensional States

Yang Yu, Minwoo Jung, Gennady Shvets

When analyzing non-Hermitian lattice systems, the standard eigenmode decomposition utilized for the analysis of Hermitian systems must be replaced by Jordan decomposition. This app…

cond-mat.mes-hall2020★ 1 cited

Strong, Temperature-Dependent Spin-Orbit Torques in Heavy Fermion YbAl

Neal D Reynolds, Shouvik Chatterjee, Gregory M. Stiehl +6

The use of current-generated spin-orbit torques[1] to drive magnetization dynamics is under investigation to enable a new generation of non-volatile, low-power magnetic memory. Pre…

cond-mat.mes-hall2020★ 53 cited

Predicted strong coupling of solid-state spins via a single magnon mode

Denis R. Candido, Gregory D. Fuchs, Ezekiel Johnston-Halperin +1

We propose an approach to realize a hybrid quantum system composed of a diamond nitrogen-vacancy (NV) center spin coupled to a magnon mode of the low-damping, low-moment organic fe…

cond-mat.mes-hall2020★ 5 cited

Berry curvature, semiclassical electron dynamics, and topological materials: Lecture notes for Introduction to Solid State Physics

Daniel C. Ralph

Lecture notes used in a graduate-level Introduction to Solid State Physics course at Cornell University, to serve as a supplement to textbooks at the level of Ashcroft & Mermin.

cond-mat.mes-hall2020★ 151 cited

Gate-tunable spin waves in antiferromagnetic atomic bilayers

Xiao-Xiao Zhang, Lizhong Li, Daniel Weber +3

The emergence of two-dimensional (2D) layered magnetic materials has opened an exciting playground for both fundamental studies of magnetism in 2D and explorations of spinbased app…