3.3k citations · 10.2k across the 89 of their papers we have counts for
20 papers · 1 filter
Pressure-induced excitations in the out-of-plane optical response of the nodal-line semimetal ZrSiS
J. Ebad-Allah, S. Rojewski, M. Vöst +9
The anisotropic optical response of the layered, nodal-line semimetal ZrSiS at ambient and high pressure is investigated by frequency-dependent reflectivity measurements for the po…
Observation of a Smoothly Tunable Dirac Point in
Sean Howard, Arjun Raghavan, Davide Iaia +9
State-of-the-art topological devices require the use topological surface states to drive electronic transport. In this study, we examine a tunable topological system, $Ge(Bi_{x}Sb_…
Hot carrier-assisted switching of the electron-phonon interaction in 1-VSe
Paulina Majchrzak, Sahar Pakdel, Deepnarayan Biswas +20
We apply an intense infrared laser pulse in order to perturb the electronic and vibrational states in the three-dimensional charge density wave material 1-VSe. Ultrafast sna…
Random magnetic anisotropy driven transitions in layered perovskite LaSrCoO
Abdul Ahad, K. Gautam, S. S. Majid +8
Attempts to unravel the nature of magnetic ordering in LaSrCoO (Co), a compound intermediate between antiferromagnetic (AFM) LaCoO (Co) and ferromagnetic…
Dirac Nodal Line and Rashba Splitting Surface States in Nonsymmorphic ZrGeTe
Yun Yen, Cheng-Li Chiu, Ping-Hui Lin +4
Dirac semimetals (DSMs) are three dimensional analogue to graphene with symmety enforced bulk Dirac nodes. Among various DSMs, ZrSiS has been attracting more interests recently, du…
Magnetic and orbital correlations in multiferroic CaMnO probed by x-ray resonant elastic scattering
K. Gautam, S. S. Majid, S. Francoual +6
The quadruple perovskite CaMnO is a topical multiferroic, in which the hierarchy of electronic correlations driving structural distortions, modulated magnetism, and orbi…
Surface Termination Dependent Quasiparticle Scattering Interference and Magneto-transport Study on ZrSiS
Chih-Chuan Su, Chi-Sheng Li, Tzu-Cheng Wang +7
Dirac nodal line semimetals represent a new state of quantum matters in which the electronic bands touch to form a closed loop with linear dispersion. Here, we report a combined st…
Optical Signatures of Dirac Nodal-lines in NbAs
Yinming Shao, Zhiyuan Sun, Ying Wang +10
Using polarized optical and magneto-optical spectroscopy, we have demonstrated universal aspects of electrodynamics associated with Dirac nodal-lines. We investigated anisotropic e…
Dynamic surface electronic reconstruction as symmetry-protected topological orders in topological insulator Bi2Se3
G. J. Shu, S. C. Liou, S. K. Karna +3
Layered narrow band gap semiconductor Bi2Se3 is composed of heavy elements with strong spin-orbital coupling (SOC), which has been identified both as a good candidate of thermoelec…
Quasiparticle Interference in ZrSiS - Strongly Band-Selective Scattering Depending on Impurity Lattice Site
Christopher J. Butler, Yu-Mi Wu, Cheng-Rong Hsing +5
Scanning tunneling microscopy visualizations of quasiparticle interference (QPI) enable powerful insights into the k-space properties of superconducting, topological, Rashba and ot…
Enhanced electron correlations in the new binary stannide PdSn4: a homologue of the Dirac nodal arc semimetal PtSn4
C. Q. Xu, W. Zhou, R. Sankar +10
The advent of nodal-line semi-metals, i.e. systems in which the conduction and valence bands cross each other along a closed trajectory (line or loop) inside the Brillouin zone, ha…
Anomalous Acoustic Plasmon Mode from Topologically Protected States
Xun Jia, Shuyuan Zhang, Raman Sankar +7
Plasmons, the collective excitations of electrons in the bulk or at the surface, play an important role in the properties of materials, and have generated the field of Plasmonics.…
Observation of surface superstructure induced by systematic vacancies in the topological Dirac semimetal CdAs
Christopher J. Butler, Yi Tseng, Cheng-Rong Hsing +6
The Dirac semimetal phase found in CdAs is protected by a rotational symmetry derived from a corkscrew arrangement of systematic Cd vacancies in its complicated…
Atomic Scale Visualization of Quantum Interference on a Weyl Semimetal Surface by Scanning Tunneling Microscopy/Spectroscopy
Hao Zheng, Su-Yang Xu, Guang Bian +19
Weyl semimetals may open a new era in condensed matter physics, materials science and nanotech after graphene and topological insulators. We report the first atomic scale view of t…
Hierarchical spin-orbital polarisation of a giant Rashba system
L. Bawden, J. M. Riley, C. H. Kim +15
The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids, and provides a cornerstone for the burgeoning field of semiconductor spintronics. It…
Graphene-like conjugated pi-bond system in Pb1-xSnxSe
G. J. Shu, S. C. Liou, S. Karna +4
Following the identification of the pi bond in graphene, in this work, a pi bond constructed through side-to-side overlap of half-filled 6pz orbitals was observed in a non-carbon c…
Nanoscale Determination of the Mass Enhancement Factor in the Lightly-Doped Bulk Insulator Lead Selenide
Ilija Zeljkovic, Kane L Scipioni, Daniel Walkup +10
Bismuth chalcogenides and lead telluride/selenide alloys exhibit exceptional thermoelectric properties which could be harnessed for power generation and device applications. Since…
Plasmons dispersion and nonvertical interband transitions in single-crystal Bi2Se3 investigated by electron energy loss spectroscopy
S. C. Liou, M. -W. Chu, R. Sankar +4
Plasmons dispersion and nonvertical interband transitions in Bi2Se3 single crystals were investigated by electron energy-loss spectroscopy in conjunction with (scanning) transmissi…
Electron-phonon Coupling on the Surface of the Topological Insulator Bi2Se3: Determined from Surface Phonon Dispersion Measurements
Xuetao Zhu, Luiz Santos, Colin Howard +4
In this letter we report measurements of the coupling between Dirac fermion quasiparticles (DFQs) and phonons on the (001) surface of the strong topological insulator Bi2Se3. While…
Interaction of Phonons and Dirac Fermions on the Surface of Bi2Se3: A Strong Kohn Anomaly
Xuetao Zhu, L. Santos, R. Sankar +5
We report the first measurements of phonon dispersion curves on the (001) surface of the strong three-dimensional topological insulator Bi2Se3. The surface phonon measurements were…