title: Fermi arcs vs. Fermi pockets in electron-doped perovskite iridates.
abstract: We report on an angle resolved photoemission (ARPES) study of bulk electron-doped perovskite iridate, (Sr(1-x)La(x))3Ir2O7. Fermi surface pockets are observed with a total electron count in keeping with that expected from La substitution. Depending on the energy and polarization of the incident photons, these pockets show up in the form of disconnected "Fermi arcs", reminiscent of those reported recently in surface electron-doped Sr2IrO4. Our observed spectral variation is consistent with the coexistence of an electronic supermodulation with structural distortion in the system.
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
authors.forename: Junfeng
authors.initials: J
authors.lastname: He
authors.affiliation: Physics Department, Northeastern University, Boston, MA 02115, USA.
authors.forename: H
authors.initials: H
authors.lastname: Hafiz
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Mion
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
authors.forename: T
authors.initials: T
authors.lastname: Hogan
authors.affiliation: 1] Department of Physics, Boston College, Chestnut Hill, MA 02467, USA [2] Chemical and Engineering Materials Divison, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
authors.forename: C
authors.initials: C
authors.lastname: Dhital
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
authors.forename: X
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
authors.forename: Qisen
authors.initials: Q
authors.lastname: Lin
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: M
authors.initials: M
authors.lastname: Hashimoto
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: D H
authors.initials: DH
authors.lastname: Lu
authors.affiliation: International Center for Quantum Materials, Peking University, Beijing 100871, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Physics Department, Northeastern University, Boston, MA 02115, USA.
authors.forename: R S
authors.initials: RS
authors.lastname: Markiewicz
authors.affiliation: Physics Department, Northeastern University, Boston, MA 02115, USA.
authors.forename: A
authors.initials: A
authors.lastname: Bansil
authors.affiliation: 1] Department of Physics, Boston College, Chestnut Hill, MA 02467, USA [2] Materials Department, University of California Santa Barbara, Santa Barbara, CA 93106, USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Wilson
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.
authors.forename: Rui-Hua
authors.initials: RH
authors.lastname: He