Superconductivity in the doped quantum spin liquid on the triangular lattice

Abstract Broad interest in quantum spin liquid (QSL) phases was triggered by the notion that they can be viewed as insulating phases with preexisting electron pairs, such that upon light doping they might automatically yield high temperature superconductivity. Yet despite intense experimental and nu...

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Autor principal:	Hong-Chen Jiang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/84fac67f208f42af8869ae812e247a8a
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spelling	oai:doaj.org-article:84fac67f208f42af8869ae812e247a8a2021-12-02T18:49:33ZSuperconductivity in the doped quantum spin liquid on the triangular lattice10.1038/s41535-021-00375-w2397-4648https://doaj.org/article/84fac67f208f42af8869ae812e247a8a2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00375-whttps://doaj.org/toc/2397-4648Abstract Broad interest in quantum spin liquid (QSL) phases was triggered by the notion that they can be viewed as insulating phases with preexisting electron pairs, such that upon light doping they might automatically yield high temperature superconductivity. Yet despite intense experimental and numerical efforts, definitive evidence showing that doping QSLs leads to superconductivity has been lacking. We address the problem of a lightly doped QSL through a large-scale density-matrix renormalization group study of the t-J model on finite-circumference triangular cylinders with a small but nonzero concentration of doped holes. We provide direct evidences that doping QSL can naturally give rise to d-wave superconductivity. Specifically, we find power-law superconducting correlations with a Luttinger exponent, K s c ≈ 1, which is consistent with a strongly diverging superconducting susceptibility, $${\chi }_{sc} \,\sim\, {T}^{-(2\,-\,{K}_{sc})}$$ χ s c ~ T − ( 2 − K s c ) as the temperature T → 0. The spin–spin correlations—as in the undoped QSL state—fall exponentially which suggests that the superconducting pair-pair correlations evolve smoothly from the insulating parent state.Hong-Chen JiangNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Hong-Chen Jiang Superconductivity in the doped quantum spin liquid on the triangular lattice
description	Abstract Broad interest in quantum spin liquid (QSL) phases was triggered by the notion that they can be viewed as insulating phases with preexisting electron pairs, such that upon light doping they might automatically yield high temperature superconductivity. Yet despite intense experimental and numerical efforts, definitive evidence showing that doping QSLs leads to superconductivity has been lacking. We address the problem of a lightly doped QSL through a large-scale density-matrix renormalization group study of the t-J model on finite-circumference triangular cylinders with a small but nonzero concentration of doped holes. We provide direct evidences that doping QSL can naturally give rise to d-wave superconductivity. Specifically, we find power-law superconducting correlations with a Luttinger exponent, K s c ≈ 1, which is consistent with a strongly diverging superconducting susceptibility, $${\chi }_{sc} \,\sim\, {T}^{-(2\,-\,{K}_{sc})}$$ χ s c ~ T − ( 2 − K s c ) as the temperature T → 0. The spin–spin correlations—as in the undoped QSL state—fall exponentially which suggests that the superconducting pair-pair correlations evolve smoothly from the insulating parent state.
format	article
author	Hong-Chen Jiang
author_facet	Hong-Chen Jiang
author_sort	Hong-Chen Jiang
title	Superconductivity in the doped quantum spin liquid on the triangular lattice
title_short	Superconductivity in the doped quantum spin liquid on the triangular lattice
title_full	Superconductivity in the doped quantum spin liquid on the triangular lattice
title_fullStr	Superconductivity in the doped quantum spin liquid on the triangular lattice
title_full_unstemmed	Superconductivity in the doped quantum spin liquid on the triangular lattice
title_sort	superconductivity in the doped quantum spin liquid on the triangular lattice
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/84fac67f208f42af8869ae812e247a8a
work_keys_str_mv	AT hongchenjiang superconductivityinthedopedquantumspinliquidonthetriangularlattice
_version_	1718377570731294720

Superconductivity in the doped quantum spin liquid on the triangular lattice

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