Normal-state Nernst effect from bidirectional bond density wave state in high-Tc cuprates

Gargee Sharma, Chunxiao Liu, Kangjun Seo, J. D. Sau, and Sumanta Tewari
Phys. Rev. B 92, 155114 – Published 9 October 2015

Abstract

The role of charge order in the phase diagram of high-temperature cuprate superconductors has been recently emphasized with the experimental discovery of an incipient bidirectional charge density wave (CDW) phase in the underdoped regime. In a subset of the experiments, the CDW has been found to be accompanied by a d-wave intra-unit-cell form factor, indicating modulation of charge density on the oxygen orbitals sandwiched between neighboring Cu atoms on the CuO planes [the so-called bond density wave (BDW) phase]. Here we take a mean field Q1=(2π/3,0) and Q2=(0,2π/3) bidirectional BDW phase with a d-wave form factor, which closely resembles the experimentally observed charge ordered states in underdoped cuprates, and we calculate the Fermi surface topology and the resulting quasiparticle Nernst coefficient as a function of temperature and doping. We establish that, in the appropriate doping ranges where the low-temperature phase (in the absence of superconductivity) is a BDW, the Fermi surface consists of electron and hole pockets, resulting in a low-temperature negative Nernst coefficient as observed in experiments.

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  • Received 30 April 2015

DOI:https://doi.org/10.1103/PhysRevB.92.155114

©2015 American Physical Society

Authors & Affiliations

Gargee Sharma1, Chunxiao Liu2, Kangjun Seo3, J. D. Sau2, and Sumanta Tewari1

  • 1Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA
  • 2Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA
  • 3School of Natural Sciences, University of California Merced, Merced, California 95343, USA

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Issue

Vol. 92, Iss. 15 — 15 October 2015

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