Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature

The interplay between thermal and quantum fluctuations controls the competition between phases of matter in strongly correlated electron systems. We study finite-temperature properties of the strongly coupled two-dimensional doped Hubbard model using the minimally entangled typical thermal states me...

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Autores principales:	Alexander Wietek, Yuan-Yao He, Steven R. White, Antoine Georges, E. Miles Stoudenmire
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/8ec30030aa9946729e1c1d1c72d3f97f
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spelling	oai:doaj.org-article:8ec30030aa9946729e1c1d1c72d3f97f2021-12-02T16:10:46ZStripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature10.1103/PhysRevX.11.0310072160-3308https://doaj.org/article/8ec30030aa9946729e1c1d1c72d3f97f2021-07-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.031007http://doi.org/10.1103/PhysRevX.11.031007https://doaj.org/toc/2160-3308The interplay between thermal and quantum fluctuations controls the competition between phases of matter in strongly correlated electron systems. We study finite-temperature properties of the strongly coupled two-dimensional doped Hubbard model using the minimally entangled typical thermal states method on width-four cylinders. We discover that a phase characterized by commensurate short-range antiferromagnetic correlations and no charge ordering occurs at temperatures above the half-filled stripe phase extending to zero temperature. The transition from the antiferromagnetic phase to the stripe phase takes place at temperature T/t≈0.05 and is accompanied by a steplike feature of the specific heat. We find the single-particle gap to be smallest close to the nodal point at k=(π/2,π/2) and detect a maximum in the magnetic susceptibility. These features bear a strong resemblance to the pseudogap phase of high-temperature cuprate superconductors. The simulations are verified using a variety of different unbiased numerical methods in the three limiting cases of zero temperature, small lattice sizes, and half filling. Moreover, we compare to and confirm previous determinantal quantum Monte Carlo results on incommensurate spin-density waves at finite doping and temperature.Alexander WietekYuan-Yao HeSteven R. WhiteAntoine GeorgesE. Miles StoudenmireAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 3, p 031007 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Alexander Wietek Yuan-Yao He Steven R. White Antoine Georges E. Miles Stoudenmire Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature
description	The interplay between thermal and quantum fluctuations controls the competition between phases of matter in strongly correlated electron systems. We study finite-temperature properties of the strongly coupled two-dimensional doped Hubbard model using the minimally entangled typical thermal states method on width-four cylinders. We discover that a phase characterized by commensurate short-range antiferromagnetic correlations and no charge ordering occurs at temperatures above the half-filled stripe phase extending to zero temperature. The transition from the antiferromagnetic phase to the stripe phase takes place at temperature T/t≈0.05 and is accompanied by a steplike feature of the specific heat. We find the single-particle gap to be smallest close to the nodal point at k=(π/2,π/2) and detect a maximum in the magnetic susceptibility. These features bear a strong resemblance to the pseudogap phase of high-temperature cuprate superconductors. The simulations are verified using a variety of different unbiased numerical methods in the three limiting cases of zero temperature, small lattice sizes, and half filling. Moreover, we compare to and confirm previous determinantal quantum Monte Carlo results on incommensurate spin-density waves at finite doping and temperature.
format	article
author	Alexander Wietek Yuan-Yao He Steven R. White Antoine Georges E. Miles Stoudenmire
author_facet	Alexander Wietek Yuan-Yao He Steven R. White Antoine Georges E. Miles Stoudenmire
author_sort	Alexander Wietek
title	Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature
title_short	Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature
title_full	Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature
title_fullStr	Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature
title_full_unstemmed	Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature
title_sort	stripes, antiferromagnetism, and the pseudogap in the doped hubbard model at finite temperature
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/8ec30030aa9946729e1c1d1c72d3f97f
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Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature

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