Disorder-driven metal-insulator transition in Pt doped 1T-TiSe2
ORAL
Abstract
We have conducted a multipronged investigation, which involves transport, Angle Resolved Photoemission Spectroscopy (ARPES) and Scanning Tunneling Spectroscopy (STS) measurements and theoretical modeling, of pristine and Pt doped 1T-TiSe2, a canonical Charge Density Wave (CDW) material. Transport data finds that at temperatures much lower than CDW transition temperature (TCDW), 1T-TiSe2 shows metallic behavior, while Pt doped samples display insulating behavior. STS reveals the formation of CDW domains with a large Mott gap separated by metallic or semi-metallic domain walls with a small pseudogap. We will present results obtained from a theoretical modeling of transport via the network of domain walls. Our combined study indicates an unconventional disorder-driven metal-insulator transition in Pt doped 1T-TiSe2 samples.
*Work supported by NSF DMR-1629382
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Presenters
Junjing Zhao
University of Virginia
Department of Physics, University of Virginia
Physics, Univ of Virginia
Authors
Kyungmin Lee
The Ohio State University
Department of Physics, The Ohio State University
Ohio State Univ - Columbus
Ohio State University
Nandini Trivedi
The Ohio State University
Physics, The Ohio State University
Physics, Ohio State Univ - Columbus
Ohio State Univ - Columbus
Physics Department, Ohio State University
Department of Physics, The Ohio State University
Ohio State University
Department of Physics, Ohio State Univ - Columbus
Junjing Zhao
University of Virginia
Department of Physics, University of Virginia
Physics, Univ of Virginia
Utpal Chatterjee
University of Virginia
Department of Physics, University of Virginia
Department of Physics, University of Virgina
Physics, Univ of Virginia
Thomas Neulinger
University of Illinois - Urbana Champaign
Physics, Univeristy of Illinois at Urbana-Champaign
Zhenyu Wang
University of Illinois - Urbana Champaign
Physics, University of Illinois
Physics, Univeristy of Illinois at Urbana-Champaign
Univ of Illinois - Urbana
Department of Physics, University of Illinois
Physics, Univ of Illinois - Urbana
Department of Physics, Univ of Illinois - Urbana-Champaign
Vidya Madhavan
Physics, Univ of Illinois - Urbana
Physics, Univ of Illinois
University of Illinois - Urbana Champaign
Physics, University of Illinois
University of Illinois at Urbana-Champaign
Physics, Univeristy of Illinois at Urbana-Champaign
Univ of Illinois - Urbana
Department of Physics, University of Illinois
Department of Physics, Univ of Illinois - Urbana-Champaign
