• Publications
  • Influence
Coexistence of Replica Bands and Superconductivity in FeSe Monolayer Films.
A systematic comparison of 1 ML FeSe on TiO_{2} with other systems in the FeSe family shows that while charge transfer alone can enhance T_{ c}, it is only with the addition of interfacial electron-phonon coupling that T_{c} can be increased to the level seen in 1  ML Fe Se on STO.
Femtosecond electron-phonon lock-in by photoemission and x-ray free-electron laser
The electron-phonon coupling strength in FeSe can be quantified by combining two time-domain experiments into a “coherent lock-in” measurement in the terahertz regime using photoemission spectroscopy and x-ray diffraction.
Invited Article: High resolution angle resolved photoemission with tabletop 11 eV laser.
A table-top vacuum ultraviolet laser with 113.778 nm wavelength is developed and demonstrated its viability as a photon source for high resolution angle-resolved photoemission spectroscopy (ARPES) and control over the linear polarization, repetition rate, and photon flux of the VUV source facilitates ARPES investigations of a broad range of quantum materials.
Origin of the low critical observing temperature of the quantum anomalous Hall effect in V-doped (Bi, Sb)2Te3 film
This work systematically study the band structure of V-doped (Bi, Sb)2Te3 thin films by angle-resolved photoemission spectroscopy (ARPES) and shows unambiguously that the bulk valence band (BVB) maximum lies higher in energy than the surface state Dirac point.
Universal Substrate Effect on the Superconductivity of FeSe Monolayer Films
S. N. Rebec, 2, ∗ T. Jia, 3, ∗ C. Zhang, 3 M. Hashimoto, D.-H. Lu, R. G. Moore, and Z.-X. Shen 2, 3 Department of Applied Physics, Stanford University, Stanford, California 94305, USA Stanford
Ubiquitous strong electron–phonon coupling at the interface of FeSe/SrTiO3
The ARPES study of the electronic structure of FeSe/STO(110) suggests that the large superconducting gaps observed in FeSe films grown on different STO surface terminations are likely enhanced by a common mechanism.
Anomalously strong near-neighbor attraction in doped 1D cuprate chains
The researchers showed that including a near-neighbor attractive interaction in a 1D model of interacting fermions was necessary to explain their photoemission measurements, and identified a prominent folding branch whose intensity fails to match predictions of the simple Hubbard model.
Dichotomy of the photo-induced 2-dimensional electron gas on SrTiO3 surface terminations
Using layer-by-layer growth of high-quality STO films, it is shown that the 2DEG only forms with the SrO termination and not with the TiO2 termination, contrary to expectation.
Epitaxial growth of TiSe 2 /TiO 2 heterostructure
Here we report that TiSe2 thin films can be epitaxially grown on TiO2 substrates despite different lattice symmetry between the two materials. The TiSe2 thin films can be prepared on TiO2 via
Magic Doping and Robust Superconductivity in Monolayer FeSe on Titanates
The charge transfer and the superconducting gap in the monolayer FeSe are found to remain markedly robust, indicating the existence of an intrinsically anchored “magic” doping within the monolingual FeSe systems.