Normal state Nernst effect from bi-directional bond density wave state in high T_c cuprates
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arXiv
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| Format: | Preprint |
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2015
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| _version_ | 1866913236471775232 |
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| author | Sharma, Gargee Liu, Chunxiao Seo, Kangjun Sau, J. D. Tewari, Sumanta |
| author_facet | Sharma, Gargee Liu, Chunxiao Seo, Kangjun Sau, J. D. Tewari, Sumanta |
| contents | The role of charge order in the phase diagram of high temperature cuprate superconductors has been recently re-emphasized by the experimental discovery of an incipient bi-directional charge density wave (CDW) phase in a class of underdoped cuprates. 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 Q_1=(2π/3,0) and Q_2=(0,2π/3) bi-directional BDW phase with a d-wave form factor, which closely resembles the experimentally observed charge ordered states in underdoped cuprates, and 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 an electron and a hole pocket, resulting in a low temperature negative Nernst coefficient as observed in experiments. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_1502_03812 |
| institution | arXiv |
| publishDate | 2015 |
| record_format | arxiv |
| spellingShingle | Normal state Nernst effect from bi-directional bond density wave state in high T_c cuprates Sharma, Gargee Liu, Chunxiao Seo, Kangjun Sau, J. D. Tewari, Sumanta Strongly Correlated Electrons Superconductivity The role of charge order in the phase diagram of high temperature cuprate superconductors has been recently re-emphasized by the experimental discovery of an incipient bi-directional charge density wave (CDW) phase in a class of underdoped cuprates. 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 Q_1=(2π/3,0) and Q_2=(0,2π/3) bi-directional BDW phase with a d-wave form factor, which closely resembles the experimentally observed charge ordered states in underdoped cuprates, and 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 an electron and a hole pocket, resulting in a low temperature negative Nernst coefficient as observed in experiments. |
| title | Normal state Nernst effect from bi-directional bond density wave state in high T_c cuprates |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/1502.03812 |