APS Logo

Tuning the electrical properties of GdSb thin films by epitaxial strain

ORAL

Abstract

Early studies of rare-earth monopnictide (RE-V) thin films have focused mainly on their applications as buried ohmic contacts for III-V semiconductors, THz emitters and detectors, thermoelectrics, diffusion barriers, and plasmonic heterostructures. Recent predictions of topological semimetallic states and observations of extremely large magnetoresistance (XMR) in RE-Vs, and specifically GdSb, have opened up a new research front aimed at studying the interplay between magnetic ordering and XMR. Here we demonstrate the epitaxial growth and characterization of GdSb thin films with thickness varied from 3-60 nm and biaxial strains ranging from -2% to +2% lattice-mismatch. Utilizing x-ray diffraction, in-vacuo angle-resolved photoemission spectroscopy, SQUID magnetometry and magnetotransport measurements we map out shifts in energy bands and trends in exchange interaction parameters due to dimensional confinement and biaxial strain.

–

Presenters

  • Hadass Inbar

    Materials, University of California, Santa Barbara

Authors

  • Hadass Inbar

    Materials, University of California, Santa Barbara

  • Shouvik Chatterjee

    Electrical & Computer Engineering, University of California, Santa Barbara

  • Mihir Pendharkar

    Dept. of Electrical Engineering, Univ. of California, Santa Barbara, CA, USA, IEE, UC Santa Barbara, University of California Santa Barbara, Univ of California, Santa Barbara, Electrical and Computer Engineering, University of California Santa Barbara, Electrical & Computer Engineering, University of California, Santa Barbara, University of California, Santa Barbara

  • Yu hao Chang

    Materials Department, University of California, Santa Barbara, Materials, University of California, Santa Barbara

  • Maxwell Miles Bocheff

    Materials, University of California, Santa Barbara

  • Taozhi Guo

    Materials, University of California, Santa Barbara

  • Tobias L Brown-Heft

    Materials, University of California, Santa Barbara

  • Alexei V Fedorov

    Advanced Light Source, Lawrence Berkeley National Lab, Advanced Light Source, Lawrence Berkeley National Laboratory

  • Dan Read

    School of Physics and Astronomy, Cardiff University

  • Chris J Palmstrom

    Materials Department, University of California, Santa Barbara, UCSB, Departments of Electrical and Computer Engineering and Materials, University of California, Santa Barbara, Dept. of Electrical Engineering, Univ. of California, Santa Barbara, CA, USA, Univ. of California, Santa Barbara, Electrical and Computer Engineering Department, University of California, Santa Barbara, University of California, Santa Barbara, IEE, UC Santa Barbara, University of California Santa Barbara, Univ of California, Santa Barbara, Electrical and Computer Engineering, University of California Santa Barbara, Materials and Electrical & Comp. Eng, University of California, Santa Barbara