Polaronic conductivity in the photoinduced phase of 1T-TaS2

Dean N, Petersen JC, Fausti D, Tobey RI, Kaiser S, Gasparov LV, Berger H, Cavalleri A (2011)

Publication Type: Journal article

Publication year: 2011

Journal

Physical Review Letters American Physical Society

Book Volume: 106

Article Number: 016401

Journal Issue: 1

DOI: 10.1103/PhysRevLett.106.016401

Abstract

The transient optical conductivity of photoexcited 1T-TaS2 is determined over a three-order-of-magnitude frequency range. Prompt collapse and recovery of the Mott gap is observed. However, we find important differences between this transient metallic state and that seen across the thermally driven insulator-metal transition. Suppressed low-frequency conductivity, Fano phonon line shapes, and a midinfrared absorption band point to polaronic transport. This is explained by noting that the photoinduced metallic state of 1T-TaS 2 is one in which the Mott gap is melted but the lattice retains its low-temperature symmetry, a regime only accessible by photodoping.© 2011 The American Physical Society.

Authors with CRIS profile

Daniele Fausti

Involved external institutions

University of Oxford

United Kingdom (GB) Universität Hamburg (UHH)

Germany (DE) University of North Florida (UNF)

United States (USA) (US) École Polytechnique Fédérale de Lausanne (EPFL)

Switzerland (CH)

How to cite

APA:

Dean, N., Petersen, J.C., Fausti, D., Tobey, R.I., Kaiser, S., Gasparov, L.V.,... Cavalleri, A. (2011). Polaronic conductivity in the photoinduced phase of 1T-TaS2. Physical Review Letters, 106(1). https://dx.doi.org/10.1103/PhysRevLett.106.016401

MLA:

Dean, Nicky, et al. "Polaronic conductivity in the photoinduced phase of 1T-TaS2." Physical Review Letters 106.1 (2011).

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