499 citations · 2.9k across the 32 of their papers we have counts for
32 papers
Signatures of Majorana Bound States in the Diffraction Patterns of Extended Superconductor-Topological Insulator-Superconductor Josephson Junctions
Guang Yue, Can Zhang, Erik D. Huemiller +13
In an extended superconductor-topological insulator-superconductor (S-TI-S) Josephson junction in a magnetic field, localized Majorana bound states (MBS) are predicted to exist at…
Ferromagnetic Anomalous Hall Effect in Cr-doped BiSe Thin Films via Surface-State Engineering
Jisoo Moon, Jinwoong Kim, Nikesh Koirala +3
The anomalous Hall effect (AHE) is a non-linear Hall effect appearing in magnetic conductors, boosted by internal magnetism beyond what is expected from the ordinary Hall effect. W…
Gate tunable quantum Hall effects in defect-suppressed Bi2Se3 films
N. Koirala, M. Salehi, J. Moon +1
Despite many years of efforts, attempts to reach the quantum regime of topological surface states (TSS) on an electrically tunable topological insulator (TI) platform have so far f…
Direct visualization of current induced spin accumulation in topological insulators
Yang Liu, Jean Besbas, Yi Wang +10
Charge-to-spin conversion in various material systems is the key for the fundamental understanding of spin-orbitronis as well as the development of efficient means to manipulate th…
Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 Topological Insulator
Flavio Giorgianni, Enrica Chiadroni, Andrea Rovere +17
Electrons with a linear energy/momentum dispersion are called massless Dirac electrons and represent the low-energy excitations in exotic materials like Graphene and Topological In…
Dirac surface states in superconductors: a dual topological proximity effect
Nicholas Sedlmayr, E. W. Goodwin, Michael Gottschalk +12
In this paper we present scanning tunneling microscopy of BiSe with superconducting Nb deposited on the surface. We find that the topologically protected surface states of…
Solution to the hole-doping problem and tunable quantum Hall effect in BiSe thin films
Jisoo Moon, Nikesh Koirala, Maryam Salehi +3
BiSe, one of the most widely studied topological insulators (TIs), is naturally electron-doped due to n-type native defects. However, many years of efforts to achieve p…
Coexistence of bulk and surface states probed by Shubnikov-de Haas oscillations in BiSe with high charge-carrier density
E. K. de Vries, S. Pezzini, M. J. Meijer +6
Topological insulators are ideally represented as having an insulating bulk with topologically protected, spin-textured surface states. However, it is increasingly becoming clear t…
A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases
Ilya Belopolski, Su-Yang Xu, Nikesh Koirala +22
Engineered lattices in condensed matter physics, such as cold atom optical lattices or photonic crystals, can have fundamentally different properties from naturally-occurring elect…
Surface vibrational modes of the topological insulator BiSe observed by Raman spectroscopy
H. -H. Kung, M. Salehi, I. Boulares +10
We present polarization resolved Raman scattering study of surface vibration modes in the topological insulator BiSe single crystal and thick films. Besides the four Raman…
Helicity dependent photovoltaic effect in Bi2Se3 under normal incident light
Jean Besbas, Karan Banerjee, Jaesung Son +7
Topological insulators (TIs) form a new class of materials with insulating bulk and surface conduction ensured by topologically protected surface states (TPSS). We investigate the…
Disorder-driven topological phase transition in Bi2Se3 films
Matthew Brahlek, Nikesh Koirala, Maryam Salehi +16
Topological insulators (TI) are a phase of matter that host unusual metallic states on their surfaces. Unlike the states that exist on the surface of conventional materials, these…
Finite-size and composition-driven topological phase transition in (BiIn)Se thin films
Maryam Salehi, Hassan Shapourian, Nikesh Koirala +3
In a topological insulator (TI), if its spin-orbit coupling (SOC) strength is gradually reduced, the TI eventually transforms into a trivial insulator beyond a critical point of SO…
Tunable inverse topological heterostructure utilizing
Matthew Brahlek, Nikesh Koirala, Jianpeng Liu +6
In typical topological insulator (TI) systems the TI is bordered by a non-TI insulator, and the surrounding conventional insulators, including vacuum, are not generally treated as…
Quantized Faraday and Kerr rotation and axion electrodynamics of a 3D topological insulator
Liang Wu, M. Salehi, N. Koirala +3
Topological insulators have been proposed to be best characterized as bulk magnetoelectric materials that show response functions quantized in terms of fundamental physical constan…
Tuning and Stabilizing Topological Insulator Bi2Se3 in the Intrinsic Regime by Charge Extraction with Organic Overlayers
Liang Wu, R. M. Ireland, M. Salehi +5
In this work, we use charge extraction via organic overlayer deposition to lower the chemical potential of topological insulator Bi2Se3 thin films into the intrinsic (bulk-insulati…
Record Surface State Mobility and Quantum Hall Effect in Topological Insulator Thin Films via Interface Engineering
Nikesh Koirala, Matthew Brahlek, Maryam Salehi +11
Material defects remain as the main bottleneck to the progress of topological insulators (TIs). In particular, efforts to achieve thin TI samples with dominant surface transport ha…
Towards the understanding of the origin of charge-current-induced spin voltage signals in the topological insulator BiSe
E. K. de Vries, A. M. Kamerbeek, N. Koirala +5
Topological insulators provide a new platform for spintronics due to the spin texture of the surface states that are topologically robust against elastic backscattering. Here, we r…
Stability of low-carrier-density topological-insulator BiSe thin films and effect of capping layers
Maryam Salehi, Matthew Brahlek, Nikesh Koirala +4
Although over the past number of years there have been many advances in the materials aspects of topological insulators (TI), one of the ongoing challenges with these materials is…
Topological Surface States Originated Spin-Orbit Torques in Bi2Se3
Yi Wang, Praveen Deorani, Karan Banerjee +4
Three dimensional topological insulator bismuth selenide (Bi2Se3) is expected to possess strong spin-orbit coupling and spin-textured topological surface states, and thus exhibit a…
Plasmon-phonon interactions in topological insulator rings
Marta Autore, Fausto D'Apuzzo, Alessandra Di Gaspare +8
The great potential of Dirac electrons for plasmonics and photonics has been readily recognized after their discovery in graphene, followed by applications to smart optical devices…
High-Resolution Faraday Rotation and Electron-Phonon Coupling in Surface States of the Bulk-Insulating Topological Insulator CuBiSe
Liang Wu, Wang-Kong Tse, M. Brahlek +5
We have utilized time-domain magneto-terahertz spectroscopy to investigate the low frequency optical response of topological insulator CuBiSe and BiSe film…
Restoring Pristine Bi2Se3 Surface with an Effective Se Decapping Process
Jixia Dai, Wenbo Wang, Matthew Brahlek +4
High quality thin films of topological insulators (TI) such as Bi2Se3 have been successfully synthesized by molecular beam epitaxy (MBE). Although the surface of MBE films can be p…
Transport Properties of Topological Insulators: Band Bending, Bulk Metal-to-Insulator Transition, and Weak Anti-Localization
Matthew Brahlek, Nikesh Koirala, Namrata Bansal +1
We reanalyze some of the critical transport experiments and provide a coherent understanding of the current generation of topological insulators (TIs). Currently TI transport studi…