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

Journal Article · · Physical Review Letters
 [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)

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1399224
Alternate ID(s):
OSTI ID: 1376938
Journal Information:
Physical Review Letters, Vol. 119, Issue 8; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (5)

Spin fluctuations in hydrogen-stabilized Laves phase UTi 2 H 5 journal April 2019
Continuous transition from weakly localized regime to strong localization regime in Nd 0.7 La 0.3 NiO 3 films journal February 2019
Disorder-driven non-Fermi liquid behavior in itinerant ferromagnet α -Co 5 Ge 3 journal January 2020
Disorder and interactions in systems out of equilibrium: The exact independent-particle picture from density functional theory journal March 2018
Continuous transition from weakly localized regime to strong localization regime in Nd_{0.7}La_{0.3}NiO_{3} films text January 2020

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