962 citations · 2.3k across the 13 of their papers we have counts for
13 papers
Pseudogap in a crystalline insulator doped by disordered metals
Sae Hee Ryu, Minjae Huh, Do Yun Park +4
A key to understand how electrons behave in crystalline solids is the band structure that connects the energy of electron waves to their wavenumber (k). Even in the phase of matter…
Holstein polaron in a valley-degenerate two-dimensional semiconductor
Mingu Kang, Sung Won Jung, Woo Jong Shin +5
Two-dimensional (2D) crystals have emerged as a class of materials with tuneable carrier density. Carrier doping to 2D semiconductors can be used to modulate manybody interactions…
Universal Mechanism of Band-Gap Engineering in Transition-Metal Dichalcogenides
Mingu Kang, Beomyoung Kim, Sae Hee Ryu +7
Two-dimensional (2D) van-der-Waals semiconductors have emerged as a class of materials with promising device characteristics owing to the intrinsic bandgap. For realistic applicati…
Two-Dimensional Dirac Fermions Protected by Space-Time Inversion Symmetry in Black Phosphorus
Jimin Kim, Seung Su Baik, Sung Won Jung +5
We report the realization of novel symmetry-protected Dirac fermions in a surface-doped two-dimensional (2D) semiconductor, black phosphorus. The widely tunable band gap of black p…
A Novel Quasi-One-Dimensional Topological Insulator in Bismuth Iodide -BiI
Gabriel Autès, Anna Isaeva, Luca Moreschini +16
Recent progress in the field of topological states of matter(1,2) has largely been initiated by the discovery of bismuth and antimony chalcogenide bulk topological insulators (TIs)…
Observation of tunable bandgap and anisotropic Dirac semimetal state in black phosphorus
Jimin Kim, Seung Su Baik, Sae Hee Ryu +7
Black phosphorus consists of stacked layers of phosphorene, a two-dimensional semiconductor with promising device characteristics. We report the realization of a widely tunable ban…
Emergence of Two-Dimensional Massless Dirac Fermions, Chiral Pseudospins, and Berry's Phase in Potassium Doped Few-Layer Black Phosphorus
Seung Su Baik, Keun Su Kim, Yeonjin Yi +1
Thin flakes of black phosphorus (BP) are a two-dimensional (2D) semiconductor whose energy gap is predicted being sensitive to the number of layers and external perturbations. Very…
Tunable polaronic conduction in anatase TiO2
S. Moser, L. Moreschini, J. Jacimovic +9
Oxygen vacancies created in anatase TiO2 by UV photons (80 - 130 eV) provide an effective electron-doping mechanism and induce a hitherto unobserved dispersive metallic state. Angl…
Visualizing Atomic-Scale Negative Differential Resistance in Bilayer Graphene
Keun Su Kim, Tae-Hwan Kim, Andrew L. Walter +4
We investigate the atomic-scale tunneling characteristics of bilayer graphene on silicon carbide using the scanning tunneling microscopy. The high-resolution tunneling spectroscopy…
Small scale rotational disorder observed in epitaxial graphene on SiC(0001)
Andrew L. Walter, Aaron Bostwick, Florian Speck +8
Interest in the use of graphene in electronic devices has motivated an explosion in the study of this remarkable material. The simple, linear Dirac cone band structure offers a uni…
Radial Band Structure of Electrons in Liquid Metals
Keun Su Kim, Han Woong Yeom
The electronic band structure of a liquid metal was investigated by measuring precisely the evolution of angle-resolved photoelectron spectra during the melting of a Pb monolayer o…
Electronic structure of graphene on single crystal copper substrates
Andrew L. Walter, Shu Nie, Aaron Bostwick +7
The electronic structure of graphene on Cu(111) and Cu(100) single crystals is investigated using low energy electron microscopy, low energy electron diffraction and angle resolved…
Nearly Massless Electrons in the Silicon Interface with a Metal Film
Keun Su Kim, Sung Chul Jung, Myung Ho Kang +1
We demonstrate the realization of nearly massless electrons in the most widely used device material, silicon, at the interface with a metal film. Using angle-resolved photoemission…