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Lorentz-boost-driven magneto-optics in a Dirac nodal-line semimetal
J. Wyzula, X. Lu, D. Santos-Cottin +13
Optical response of crystalline solids is to a large extent driven by excitations that promote electrons among individual bands. This allows one to apply optical and magneto-optica…
Electron-Electron Interactions in 2D Semiconductor InSe
Arvind Shankar Kumar, Kasun Premasiri, Min Gao +4
Electron-electron interactions (EEIs) in 2D van der Waals structures is one of the topics with high current interest in physics. We report the observation of a negative parabolic m…
Oxidized-monolayer Tunneling Barrier for Strong Fermi-level Depinning in Layered InSe Transistors
Yi-Hsun Chen, Chih-Yi Cheng, Shao-Yu Chen +9
In 2D-semiconductor-based field-effect transistors and optoelectronic devices, metal-semiconductor junctions are one of the crucial factors determining device performance. The Ferm…
3D Dirac semimetal Cd3As2: A review of material properties
I. Crassee, R. Sankar, W. -L. Lee +2
Cadmium arsenide (Cd3As2) - a time-honored and widely explored material in solid-state physics - has recently attracted considerable attention. This was triggered by a theoretical…
High-performance InSe Transistors with Ohmic Contact Enabled by Nonrectifying-barrier-type Indium Electrodes
Yu-Ting Huang, Yi-Hsun Chen, Yi-Ju Ho +10
The electrical contact to two-dimensional (2D)-semiconductor materials are decisive to the electronic performance of 2D-semiconductor field-effect devices (FEDs). The presence of a…
Enhanced Light Emission from the Ridge of Two-dimensional InSe Flakes
Yang Li§, Tianmeng Wang§, Han Wang§ +10
InSe, a newly rediscovered two-dimensional (2D) semiconductor, possesses superior electrical and optical properties as a direct bandgap semiconductor with high mobility from bulk t…
Tuning Rashba Spin-Orbit Coupling in Gated Multilayer InSe
Kasun Premasiri, Santosh Kumar Radha, Sukrit Sucharitakul +5
Manipulating the electron spin with the aid of spin-orbit coupling (SOC) is an indispensable element of spintronics. Electrostatically gating a material with strong SOC results in…
The energy scale of Dirac electrons in Cd3As2
M. Hakl, S. Tchoumakov, I. Crassee +15
Cadmium arsenide (Cd3As2) has recently became conspicuous in solid-state physics due to several reports proposing that it hosts a pair of symmetry-protected 3D Dirac cones. Despite…
Ultrasensitive Tunability of the Direct Bandgap of Two-dimensional InSe Flakes via Strain Engineering
Yang Li§, Tianmeng Wang§, Meng Wu§ +9
InSe, a member of the layered materials family, is a superior electronic and optical material which retains a direct bandgap feature from the bulk to atomically thin few-layers and…
Resistivity Anomaly in Weyl Semimetal candidate Molybdenum Telluride
Dhavala Suri, Christopher Linderalv, Bogdan Karpiak +8
The Weyl semi-metal candidate MoTe is expected to exhibit a range of exotic electronic transport properties. It exhibits a structural phase transition near room temperature t…
Distinct multiple fermionic states in a single topological metal
M. Mofazzel Hosen, Klauss Dimitri, Ashis K. Nandy +11
Among the quantum materials that gained interest recently are the topological Dirac/Weyl semimetals, where conduction and valence bands touch at points in reciprocal (k)-space, and…
Planar Hall-effect, Anomalous planar Hall-effect, and Magnetic Field-Induced Phase Transitions in TaAs
Q. R. Zhang, B. Zeng, Y. C. Chiu +16
We evaluate the topological character of TaAs through a detailed study of the angular, magnetic-field and temperature dependence of its magnetoresistivity and Hall-effect(s), and o…
Tunability of the topological nodal-line semimetal phase in ZrSiX-type materials
M. Mofazzel Hosen, Klauss Dimitri, Ilya Belopolski +11
The discovery of a topological nodal-line (TNL) semimetal phase in ZrSiS has invigorated the study of other members of this family. Here, we present a comparative electronic struct…
Interplay of orbital effects and nanoscale strain in topological crystalline insulators
Daniel Walkup, Badih Assaf, Kane L Scipioni +6
Orbital degrees of freedom can have pronounced effects on the fundamental properties of electrons in solids. In addition to influencing bandwidths, gaps, correlation strength and d…
Observation of Ultrahigh Mobility Surface States in a Topological Crystalline Insulator by Infrared Spectroscopy
Ying Wang, Guoyu Luo, Junwei Liu +5
Topological crystalline insulators (TCIs) possess metallic surface states protected by crystalline symmetry, which are a versatile platform for exploring topological phenomena and…
Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
Madhab Neupane, Nasser Alidoust, M. Mofazzel Hosen +17
Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a syst…
Screening limited switching performance of multilayer 2D semiconductor FETs: the case for SnS
Sukrit Sucharitakul, Rajesh Kumar Ulaganathan, Raman Sankar +6
Gate tunable p-type multilayer tin mono-sulfide (SnS) field-effect transistor (FET) devices with SnS thickness between 50 and 100 nm were fabricated and studied to understand their…
Large transverse Hall-like signal in topological Dirac semimetal Cd3As2
Shih-Ting Guo, R. Sankar, Yung-Yu Chien +5
Cadmium arsenide () is known for its inverted band structure and ultra-high electron mobility. It has been theoretically predicted and also confirmed by ARPES experim…
Observation of Topological Nodal Fermion Semimetal Phase in ZrSiS
Madhab Neupane, Ilya Belopolski, M. Mofazzel Hosen +12
Unveiling new topological phases of matter is one of the current objectives in condensed matter physics. Recent experimental discoveries of Dirac and Weyl semimetals prompt to sear…
Topological Dirac States and Pairing Correlations in the Non-Centrosymmetric Superconductor PbTaSe2
Tay-Rong Chang, Peng-Jen Chen, Guang Bian +13
Superconductivity in topological band structures is a platform for many novel exotic quantum phenomena such as emergent supersymmetry. This potential nourishes the search for topol…
Electronic structure and relaxation dynamics in a superconducting topological material
Madhab Neupane, Yukiaki Ishida, Raman Sankar +9
Topological superconductors host new states of quantum matter which show a pairing gap in the bulk and gapless surface states providing a platform to realize Majorana fermions. Rec…
Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator
Madhab Neupane, Su-Yang Xu, R. Sankar +17
We report the evolution of the surface electronic structure and surface material properties of a topological crystalline insulator (TCI) Pb1-xSnxSe as a function of various materia…
Experimental discovery of a topological Weyl semimetal state in TaP
Su-Yang Xu, Ilya Belopolski, Daniel S. Sanchez +24
Weyl semimetals are expected to open up new horizons in physics and materials science because they provide the first realization of Weyl fermions and exhibit protected Fermi arc su…
Topological Nodal-Line Fermions in the Non-Centrosymmetric Superconductor Compound PbTaSe2
Guang Bian, Tay-Rong Chang, Raman Sankar +18
We report the identification of a Topological Nodal-Line Semimetal state in PbTaSe2.