Parity-time symmetry-breaking mechanism of dynamic Mott transitions in dissipative systems

Tripathi, Vikram; Galda, Alexey; Barman, Himadri; Vinokur, Valerii M.

doi:10.1103/PhysRevB.94.041104

Title: Parity-time symmetry-breaking mechanism of dynamic Mott transitions in dissipative systems

Journal Article · Tue Jul 05 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.041104· OSTI ID:1352639

Tripathi, Vikram ^[1]; Galda, Alexey ^[2]; Barman, Himadri ^[3]; Vinokur, Valerii M. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Tata Inst. of Fundamental Research, Bombay (India). Dept. of Theoretical Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Tata Inst. of Fundamental Research, Bombay (India). Dept. of Theoretical Physics

Here, we describe the critical behavior of the electric field-driven (dynamic) Mott insulator-to-metal transitions in dissipative Fermi and Bose systems in terms of non-Hermitian Hamiltonians invariant under simultaneous parity (P) and time-reversal (T) operations. The dynamic Mott transition is identified as a PT symmetry-breaking phase transition, with the Mott insulating state corresponding to the regime of unbroken PT symmetry with a real energy spectrum. We also established that the imaginary part of the Hamiltonian arises from the combined effects of the driving field and inherent dissipation. We derive the renormalization and collapse of the Mott gap at the dielectric breakdown and describe the resulting critical behavior of transport characteristics. The critical exponent we obtained is in an excellent agreement with experimental findings.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1352639

Alternate ID(s):: OSTI ID: 1260307

Journal Information:: Physical Review B, Vol. 94, Issue 4; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 21 works

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