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

Abstract

Here, 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 T α 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.

Authors:
 [1];  [2];  [1];  [3];  [3]
  1. The Univ. of Tennessee, Knoxville, TN (United States)
  2. National Institute of Science Education and Research, Jatni (India)
  3. The Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1399224
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 119; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Patel, Niravkumar D., Mukherjee, Anamitra, Kaushal, Nitin, Moreo, Adriana, and Dagotto, Elbio R.. Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.086601.
Patel, Niravkumar D., Mukherjee, Anamitra, Kaushal, Nitin, Moreo, Adriana, & Dagotto, Elbio R.. Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature. United States. doi:10.1103/PhysRevLett.119.086601.
Patel, Niravkumar D., Mukherjee, Anamitra, Kaushal, Nitin, Moreo, Adriana, and Dagotto, Elbio R.. Thu . "Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature". United States. doi:10.1103/PhysRevLett.119.086601.
@article{osti_1399224,
title = {Non-Fermi Liquid Behavior and Continuously Tunable Resistivity Exponents in the Anderson-Hubbard Model at Finite Temperature},
author = {Patel, Niravkumar D. and Mukherjee, Anamitra and Kaushal, Nitin and Moreo, Adriana and Dagotto, Elbio R.},
abstractNote = {Here, 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.},
doi = {10.1103/PhysRevLett.119.086601},
journal = {Physical Review Letters},
number = 8,
volume = 119,
place = {United States},
year = {Thu Aug 24 00:00:00 EDT 2017},
month = {Thu Aug 24 00:00:00 EDT 2017}
}