Showing 2021 · cond-mat.str-elShow all

25 papers · 2 filters

cond-mat.str-el2021★ 27 cited

Low energy structure of spiral spin liquids

Han Yan, Johannes Reuther

In this work we identify a previously unexplored type of topological defect in spiral spin liquids -- the momentum vortex -- and reveal its dominant role in shaping the low energy…

cond-mat.str-el2021★ 11 cited

Spin Waves and Dirac Magnons in a Honeycomb Lattice Zig-zag Antiferromagnet BaNi2(AsO4)2

Bin Gao, Tong Chen, Chong Wang +5

The topological properties of massive and massless fermionic quasiparticles have been intensively investigated over the past decade in topological materials without magnetism. Rece…

cond-mat.str-el2021★ 15 cited

Freezing of the Lattice in the Kagome Lattice Heisenberg Antiferromagnet Zn-barlowite ZnCu(OD)FBr

Jiaming Wang, Weishi Yuan, Philip M. Singer +5

We use Br nuclear quadrupole resonance (NQR) to demonstrate that ultra slow lattice dynamics set in below the temperature scale set by the Cu-Cu super-exchange interaction $…

cond-mat.str-el2021★ 12 cited

Local dynamics and thermal activation in the transverse-field Ising chain

Jiahao Yang, Weishi Yuan, Takashi Imai +3

There has been considerable recent progress in identifying candidate materials for the transverse-field Ising chain (TFIC), a paradigmatic model for quantum criticality. Here, we s…

cond-mat.str-el2021

The many faces (phases) of strong correlations

Silke Paschen, Qimiao Si

There has been considerable recent progress in discovering and understanding quantum phases and fluctuations produced by strong correlations. Heavy fermion systems are an ideal pla…

cond-mat.str-el2021★ 110 cited

Electron-phonon coupling in the charge density wave state of CsVSb

Yaofeng Xie, Yongkai Li, Philippe Bourges +9

Metallic materials with kagome lattice structure are interesting because their electronic structures can host flat bands, Dirac cones, and van Hove singularities, resulting in stro…

cond-mat.str-el2021★ 33 cited

Massless Dirac magnons in the two dimensional van der Waals honeycomb magnet CrCl3

Lebing Chen, Matthew B. Stone, Alexander I. Kolesnikov +4

Two dimensional van der Waals ferromagnets with honeycomb structures are expected to host the bosonic version of Dirac particles in their magnon excitation spectra. Using inelastic…

cond-mat.str-el2021★ 45 cited

Incommensurate magnetic orders and topological Hall effect in the square-net centrosymmetric EuGaAl system

Jaime M. Moya, Shiming Lei, Eleanor M. Clements +16

Neutron diffraction on the centrosymmetric square-net magnet EuGaAl reveals multiple incommensurate magnetic states (AFM1,2,3) in zero field. In applied field, a new magnet…

cond-mat.str-el2021★ 10 cited

Interaction-driven quantum anomalous Hall insulator in Dirac semimetal

Hongyu Lu, Shouvik Sur, Shou-Shu Gong +1

The interaction-driven quantum anomalous Hall (QAH) insulator has been sought for a long time in a Dirac semimetal with linear band touching points at the Fermi level. By combining…

cond-mat.str-el2021★ 4 cited

Transport anomalies in the layered compound BaPt4Se6

Sheng Li, Yichen Zhang, Hanlin Wu +11

We report a layered ternary selenide BaPt4Se6 featuring sesqui-selenide Pt2Se3 layers sandwiched by Ba atoms. The Pt2Se3 layers in this compound can be derived from the Dirac-semim…

cond-mat.str-el2021★ 9 cited

Unconventional Superconductivity from Fermi Surface Fluctuations in Strongly Correlated Metals

Haoyu Hu, Ang Cai, Lei Chen +4

In quantum materials, electrons that have strong correlations tend to localize, leading to quantum spins as the building blocks for low-energy physics. When strongly correlated ele…

cond-mat.str-el2021★ 63 cited

Sleuthing out exotic quantum spin liquidity in the pyrochlore magnet CeZrO

Anish Bhardwaj, Shu Zhang, Han Yan +3

The search for quantum spin liquids (QSL) -- topological magnets with fractionalized excitations -- has been a central theme in condensed matter and materials physics. While theori…

cond-mat.str-el2021★ 55 cited

Topological Semimetal driven by Strong Correlations and Crystalline Symmetry

Lei Chen, Chandan Setty, Haoyu Hu +9

Electron correlations amplify quantum fluctuations and, as such, they have been recognized as the origin of a rich landscape of quantum phases. Whether and how they lead to gapless…

cond-mat.str-el2021★ 1 cited

Thermal coupled cluster theory for SU(2) systems

Gaurav Harsha, Yi Xu, Thomas M. Henderson +1

Coupled cluster (CC) has established itself as a powerful theory to study correlated quantum many-body systems. Finite-temperature generalizations of CC theory have attracted consi…

cond-mat.str-el2021★ 4 cited

RKKY coupled local moment magnetism in NaFeCuAs

Yizhou Xin, Ingrid Stolt, Yu Song +2

A central question in a large class of strongly correlated electron systems, including heavy fermion compounds and iron pnictides, is the identification of different phases and the…

cond-mat.str-el2021★ 89 cited

Magnetic field effect on topological spin excitations in CrI

Lebing Chen, Jae-Ho Chung, Matthew B. Stone +8

The search for topological spin excitations in recently discovered two-dimensional (2D) van der Waals (vdW) magnetic materials is important because of their potential applications…

cond-mat.str-el2021★ 11 cited

High-energy magnetic excitations from heavy quasiparticles in CeCuSi

Yu Song, Weiyi Wang, Chongde Cao +8

Magnetic fluctuations is the leading candidate for pairing in cuprate, iron-based and heavy fermion superconductors. This view is challenged by the recent discovery of nodeless sup…

cond-mat.str-el2021★ 209 cited

Electronic nature of chiral charge order in the kagome superconductor CsV3Sb5

Zhiwei Wang, Yu-Xiao Jiang, Jia-Xin Yin +21

Kagome superconductors with Tc up to 7K have been discovered over 40 years. Recently, unconventional chiral charge order has been reported in kagome superconductor KV3Sb5, with an…

cond-mat.str-el2021★ 10 cited

Charge neutral fermions and magnetic field driven instability in insulating YbIrSi

Y. Sato, S. Suetsugu, T. Tominaga +12

Materials where localized magnetic moments are coupled to itinerant electrons, the so-called Kondo lattice materials, provide a very rich backdrop for strong electron correlations.…

cond-mat.str-el2021★ 62 cited

Spin excitations in metallic kagome lattice FeSn and CoSn

Yaofeng Xie, Lebing Chen, Tong Chen +11

In two-dimensional (2D) metallic kagome lattice materials, destructive interference of electronic hopping pathways around the kagome bracket can produce nearly localized electrons,…

cond-mat.str-el2021★ 23 cited

Coupled cluster and perturbation theories based on a cluster mean-field reference applied to strongly correlated spin systems

Athanasios Papastathopoulos-Katsaros, Carlos A. Jiménez-Hoyos, Thomas M. Henderson +1

We introduce perturbation and coupled-cluster theories based on a cluster mean-field reference for describing the ground state of strongly-correlated spin systems. In cluster mean-…

cond-mat.str-el2021★ 4 cited

Spin dynamics in NaFeAs and NaFeCuAs probed by resonant inelastic X-ray scattering

Yu Song, Weiyi Wang, Eugenio Paris +11

The parent compounds of iron-based superconductors are magnetically-ordered bad metals, with superconductivity appearing near a putative magnetic quantum critical point. The presen…

cond-mat.str-el2021★ 17 cited

Superconductivity from Luttinger surfaces: Emergent -body SYK physics

Chandan Setty

The pairing of two electrons on a Fermi surface due to an infinitesimal attraction between them always results in a superconducting instability at zero temperature (). The equ…

cond-mat.str-el2021★ 49 cited

-axis transport in UTe: Evidence of Three Dimensional Conductivity Component

Yun Suk Eo, Shouzheng Liu, Shanta R. Saha +13

We study the temperature dependence of electrical resistivity for currents directed along all crystallographic axes of the spin-triplet superconductor UTe. We focus particula…