Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature

Niravkumar D. Patel; Anamitra Mukherjee; Nitin Kaushal; Adriana Moreo; Elbio Dagotto

doi:10.1103/PhysRevLett.119.086601

Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature

Niravkumar D. Patel
, Anamitra Mukherjee
, Nitin Kaushal
, Adriana Moreo
, Elbio Dagotto

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

We employ a recently developed computational many-body technique to study for the first time the half-filled Anderson-Hubbard model at finite temperature and arbitrary correlation U and disorder V strengths. Interestingly, the narrow zero temperature metallic range induced by disorder from the Mott insulator expands with increasing temperature in a manner resembling a quantum critical point. Our study of the resistivity temperature scaling Tα for this metal reveals non-Fermi liquid characteristics. Moreover, a continuous dependence of α on U and V from linear to nearly quadratic is observed. We argue that these exotic results arise from a systematic change with U and V of the "effective" disorder, a combination of quenched disorder and intrinsic localized spins.

Original language	English
Article number	086601
Journal	Physical Review Letters
Volume	119
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.119.086601
State	Published - Aug 24 2017
Externally published	Yes

Funding

A. M. acknowledges useful discussions with P. Majumdar, P. Chakraborty, and H. R. Krishnamurthy. N. D. P. and N. K. were supported by the National Science Foundation, under Grant No. DMR-1404375. E. D. and A. M. were supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division.

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10.1103/PhysRevLett.119.086601

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abstract = "We employ a recently developed computational many-body technique to study for the first time the half-filled Anderson-Hubbard model at finite temperature and arbitrary correlation U and disorder V strengths. Interestingly, the narrow zero temperature metallic range induced by disorder from the Mott insulator expands with increasing temperature in a manner resembling a quantum critical point. Our study of the resistivity temperature scaling Tα for this metal reveals non-Fermi liquid characteristics. Moreover, a continuous dependence of α on U and V from linear to nearly quadratic is observed. We argue that these exotic results arise from a systematic change with U and V of the {"}effective{"} disorder, a combination of quenched disorder and intrinsic localized spins.",

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AU - Kaushal, Nitin

AU - Moreo, Adriana

AU - Dagotto, Elbio

PY - 2017/8/24

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Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature

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