Showing 2020 · cond-mat.mtrl-sciShow all

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cond-mat.mtrl-sci2020★ 4 cited

Dirac node engineering and flat bands in doped Dirac materials

Anna Pertsova, Peter Johnson, Daniel P. Arovas +1

We suggest the tried approach of impurity band engineering to produce flat bands and additional nodes in Dirac materials. We show that surface impurities give rise to nearly flat i…

cond-mat.mtrl-sci2020★ 5 cited

Atomic forces from Dirac-Kohn-Sham equations: Implementation in flexible (APW+lo/LAPW)+LO basis set

Andrey L. Kutepov

Atomic forces formulation based on the Dirac-Kohn-Sham equation and flexible (APW+lo/LAPW)+LO basis set is presented. The formulation was implemented in the code FlapwMBPT and allo…

cond-mat.mtrl-sci2020★ 8 cited

Absence of a Dirac gap in ferromagnetic Cr(BiSb)Te

Chung Koo Kim, Jonathan D. Denlinger, Asish K. Kundu +2

Magnetism breaks the time reversal symmetry expected to open a Dirac gap in 3D topological insulators that consequently leads to quantum anomalous Hall effect. The most common appr…

cond-mat.mtrl-sci2020★ 88 cited

Observation and control of the weak topological insulator state in ZrTe5

Peng Zhang, Ryo Noguchi, Kenta Kuroda +14

A quantum spin Hall insulator hosts topological states at the one-dimensional edge, along which backscattering by nonmagnetic impurities is strictly prohibited and dissipationless…

cond-mat.mtrl-sci2020★ 28 cited

Elimination of the linearization error in APW/LAPW basis set: Dirac-Kohn-Sham equations

Andrey L. Kutepov

A detailed account of the implementation of equations of the Relativistic Density Functional Theory (RDFT) using basis sets of APW/LAPW type with flexible extensions provided by lo…

cond-mat.mtrl-sci2020★ 997 cited

CsVSb: a topological kagome metal with a superconducting ground state

Brenden R. Ortiz, Samuel M. L. Teicher, Yong Hu +11

Recently discovered alongside its sister compounds KVSb and RbVSb, CsVSb crystallizes with an ideal kagome network of vanadium and antimonene layers separat…

cond-mat.mtrl-sci2020★ 25 cited

Synthesis of narrow SnTe nanowires using alloy nanoparticles

Pengzi Liu, Hyeuk Jin Han, Julia Wei +7

Topological crystalline insulator tin telluride (SnTe) provides a rich playground to examine interactions of correlated electronic states, such as ferroelectricity, topological sur…

cond-mat.mtrl-sci2020★ 25 cited

Observation of a Chiral Wave Function in Twofold Degenerate Quadruple Weyl System BaPtGe

Haoxiang Li, Tiantian Zhang, A. Said +10

Topological states in quantum materials are defined by non-trivial topological invariants, such as the Chern number, which are properties of their bulk wave functions. A remarkable…

cond-mat.mtrl-sci2020★ 8 cited

Multi hole bands and quasi 2-dimensionality in Cr2Ge2Te6 studied by angle-resolved photoemission spectroscopy

T. Yilmaz, R. M. Geilhufe, I. Pletikosić +5

In the present work, we investigate the electronic structure of the two-dimensional (2D) ferromagnet Cr2Ge2Te6 by photoemission spectroscopy and ab initio calculations. Our results…

cond-mat.mtrl-sci2020★ 1 cited

Comment on "Colossal Pressure-Induced Softening in Scandium Fluoride"

I. A. Zaliznyak, E. Bozin, A. V. Tkachenko

The results reported by Wei et al. [Phys. Rev. Lett. 124, 255502 (2020)] can be confronted with predictive, quantitative theories of negative thermal expansion (NTE) and pressure-i…

cond-mat.mtrl-sci2020★ 18 cited

Two-orbital degeneracy lifted state as a local precursor to a metal-insulator transition

Long Yang, Robert J. Koch, Hong Zheng +5

The recent discovery of a local fluctuating t2g orbital-degeneracy-lifted (ODL) state in CuIr2S4 as a high temperature precursor to the metal-insulator transition (MIT) opens the d…

cond-mat.mtrl-sci2020★ 12 cited

The electric pulses induced multi-resistance states in the hysteresis temperature range of 1T-TaS2 and 1T-TaS1.6Se0.4

Yongchang Ma, Dong Wu, Cuimin Lu +1

The electric pulse-induced responses of 1T-TaS2 and 1T-TaS1.6Se0.4 crystals in the commensurate charge-density-wave (CCDW) phase in the hysteresis temperature range have been inves…

cond-mat.mtrl-sci2020★ 3 cited

One-Dimensional Twisted and Tubular Structures of Zinc Oxide by Semiconductor-Catalyzed Vapor-Liquid-Solid Synthesis

Thang Pham, Sampath Kommandur, Haeyeon Lee +3

The exploration of new catalysts for the vapor-liquid-solid (VLS) synthesis of one-dimensional (1-D) materials promises to yield new morphologies and functionality. Here, we show,…

cond-mat.mtrl-sci2020★ 21 cited

Vacancy defect control of colossal thermopower in FeSb2

Qianheng Du, Lijun Wu, Huibo Cao +9

Iron diantimonide is a material with the highest known thermoelectric power. By combining scanning transmission electron microscope study with electronic transport neutron, X-ray s…

cond-mat.mtrl-sci2020★ 2 cited

Surface Conductivity in Antiferromagnetic Semiconductor CrSb

Qianheng Du, Huixia Fu, Junzhang Ma +4

The contribution of bulk and surface to the electrical resistance along crystallographic \textit{b}- and \textit{c}-axes as a function of crystal thickness gives evidence for a tem…

cond-mat.mtrl-sci2020

Room-Temperature Skyrmion Thermopower in Fe3Sn2

Qianheng Du, Myung-Geun Han, Yu Liu +3

We present first room-temperature thermoelectric signature of the skyrmion lattice. This was observed in Fe3Sn2, a Kagome Dirac crystal with massive Dirac fermions that features hi…

cond-mat.mtrl-sci2020★ 5 cited

Measurement of Ehrlich-Schwoebel barrier contribution to the self-organized formation of ordered surface patterns on Ge(001)

Peco Myint, Denise Erb, Xiaozhi Zhang +6

Normal incidence 1 keV Ar ion bombardment leads to amorphization and ultrasmoothing of Ge at room temperature, but at elevated temperatures the Ge surface remains crystalline a…

cond-mat.mtrl-sci2020★ 24 cited

Spatially correlated incommensurate lattice modulations in an atomically thin high-temperature Bi_{2.1}Sr_{1.9}CaCu_{2.0}O_{8+δ} superconductors

Nicola Poccia, Shu Yang Frank Zhao, Hyobin Yoo +11

Strong variations in superconducting critical temperatures in different families of the cuprate perovskites, even with similar hole doping in their copper-oxygen planes, suggest th…

cond-mat.mtrl-sci2020★ 115 cited

Predicting the Activity and Selectivity of Bimetallic Metal Catalysts for Ethanol Reforming using Machine Learning

Nongnuch Artrith, Zhexi Lin, Jingguang G. Chen

Machine learning is ideally suited for the pattern detection in large uniform datasets, but consistent experimental datasets on catalyst studies are often small. Here we demonstrat…

cond-mat.mtrl-sci2020★ 6 cited

Signature of Many-Body Localization of Phonons in Strongly Disordered Superlattices

Thanh Nguyen, Nina Andrejevic, Hoi Chun Po +17

Many-body localization (MBL) has attracted significant attention due to its immunity to thermalization, role in logarithmic entanglement entropy growth, and opportunities to reach…

cond-mat.mtrl-sci2020★ 100 cited

Crystallography companion agent for high-throughput materials discovery

Phillip M. Maffettone, Lars Banko, Peng Cui +5

The discovery of new structural and functional materials is driven by phase identification, often using X-ray diffraction (XRD). Automation has accelerated the rate of XRD measurem…

cond-mat.mtrl-sci2020★ 5 cited

Unusual Electrical Conductivity Driven by Localized Stoichiometry Modification at Vertical Epitaxial Interfaces

Wenrui Zhang, Shaobo Cheng, Christopher M Rouleau +7

Precise control of lattice mismatch accommodation and cation interdiffusion across the interface is critical to modulate correlated functionalities in epitaxial heterostructures, p…

cond-mat.mtrl-sci2020★ 51 cited

Spin-orbit quantum impurity and quantization in a topological magnet

Jia-Xin Yin, Nana Shumiya, Yuxiao Jiang +22

Quantum states induced by single-atomic impurities are at the frontier of physics and material science. While such states have been reported in high-temperature superconductors and…

cond-mat.mtrl-sci2020★ 3 cited

Water-induced formation of an alkali-ion dimer in cryptomelane nanorods

Shaobo Cheng, Vidushi Sharma, Altug S. Poyraz +7

Tunneled metal oxides such as MnO (hollandite) have proven to be compelling candidates for charge-storage materials in high-density batteries. In particular, the tun…