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# Two-hole ground state wavefunction: Non-BCS pairing in a $$t$$-$$J$$ two-leg ladder system

Superconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction proposed for the high-temperature superconductivity in the cuprate. A natural question is \emph{if} any fundamental physics... Full description

 Journal Title: arXiv.org Dec 16, 2018 Main Author: Chen, Shuai Other Authors: Zhu, Zheng , Zheng-Yu, Weng Format: Electronic Article Language: English Subjects: ID: DOI: 10.1103/PhysRevB.98.245138 Zum Text:
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 recordid: proquest2092790196 title: Two-hole ground state wavefunction: Non-BCS pairing in a $$t$$-$$J$$ two-leg ladder system format: Article creator: Chen, Shuai Zhu, Zheng Zheng-Yu, Weng subjects: Ground State Antiferromagnetism High Temperature Superconductivity Computer Simulation Correlation Analysis ispartof: arXiv.org, Dec 16, 2018 description: Superconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction proposed for the high-temperature superconductivity in the cuprate. A natural question is \emph{if} any fundamental physics could be possibly missed by applying such a scheme to strongly correlated systems. Here we study the pairing wavefunction of two holes injected into a Mott insulator/antiferromagnet in a two-leg ladder using variational Monte Carlo (VMC) approach. By comparing with density matrix renormalization group (DMRG) calculation, we show that a conventional BCS or RVB pairing of the doped holes makes qualitatively wrong predictions and is incompatible with the fundamental pairing force in the $$t$$-$$J$$ model, which is kinetic-energy-driven by nature. By contrast, a non-BCS-like wavefunction incorporating such novel effect will result in a substantially enhanced pairing strength and improved ground state... language: eng source: identifier: DOI: 10.1103/PhysRevB.98.245138 fulltext: fulltext_linktorsrc url: Link

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titleTwo-hole ground state wavefunction: Non-BCS pairing in a $$t$$-$$J$$ two-leg ladder system
creatorChen, Shuai ; Zhu, Zheng ; Zheng-Yu, Weng
contributorZheng-Yu, Weng (pacrepositoryorg)
ispartofarXiv.org, Dec 16, 2018
identifierDOI: 10.1103/PhysRevB.98.245138
subjectGround State ; Antiferromagnetism ; High Temperature ; Superconductivity ; Computer Simulation ; Correlation Analysis
descriptionSuperconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction proposed for the high-temperature superconductivity in the cuprate. A natural question is \emph{if} any fundamental physics could be possibly missed by applying such a scheme to strongly correlated systems. Here we study the pairing wavefunction of two holes injected into a Mott insulator/antiferromagnet in a two-leg ladder using variational Monte Carlo (VMC) approach. By comparing with density matrix renormalization group (DMRG) calculation, we show that a conventional BCS or RVB pairing of the doped holes makes qualitatively wrong predictions and is incompatible with the fundamental pairing force in the $$t$$-$$J$$ model, which is kinetic-energy-driven by nature. By contrast, a non-BCS-like wavefunction incorporating such novel effect will result in a substantially enhanced pairing strength and improved ground state...
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titleTwo-hole ground state wavefunction: Non-BCS pairing in a $$t$$-$$J$$ two-leg ladder system
descriptionSuperconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction proposed for the high-temperature superconductivity in the cuprate. A natural question is \emph{if} any fundamental physics could be possibly missed by applying such a scheme to strongly correlated systems. Here we study the pairing wavefunction of two holes injected into a Mott insulator/antiferromagnet in a two-leg ladder using variational Monte Carlo (VMC) approach. By comparing with density matrix renormalization group (DMRG) calculation, we show that a conventional BCS or RVB pairing of the doped holes makes qualitatively wrong predictions and is incompatible with the fundamental pairing force in the $$t$$-$$J$$ model, which is kinetic-energy-driven by nature. By contrast, a non-BCS-like wavefunction incorporating such novel effect will result in a substantially enhanced pairing strength and improved ground state...
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abstractSuperconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction proposed for the high-temperature superconductivity in the cuprate. A natural question is \emph{if} any fundamental physics could be possibly missed by applying such a scheme to strongly correlated systems. Here we study the pairing wavefunction of two holes injected into a Mott insulator/antiferromagnet in a two-leg ladder using variational Monte Carlo (VMC) approach. By comparing with density matrix renormalization group (DMRG) calculation, we show that a conventional BCS or RVB pairing of the doped holes makes qualitatively wrong predictions and is incompatible with the fundamental pairing force in the $$t$$-$$J$$ model, which is kinetic-energy-driven by nature. By contrast, a non-BCS-like wavefunction incorporating such novel effect will result in a substantially enhanced pairing strength and improved ground state...
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pubCornell University Library, arXiv.org
doi10.1103/PhysRevB.98.245138
urlhttp://search.proquest.com/docview/2092790196/
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issue24
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