scholarly journals Non-Fermi-liquid fixed point in a Wilsonian theory of quantum critical metals

2013 ◽  
Vol 88 (12) ◽  
Author(s):  
A. Liam Fitzpatrick ◽  
Shamit Kachru ◽  
Jared Kaplan ◽  
S. Raghu
Keyword(s):  
Fixed Point ◽  
Fermi Liquid ◽  
Critical Metals ◽  
Quantum Critical

scholarly journals Identification of non-Fermi liquid fermionic self-energy from quantum Monte Carlo data

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Xiao Yan Xu ◽  
Avraham Klein ◽  
Kai Sun ◽  
Andrey V. Chubukov ◽  
Zi Yang Meng
Keyword(s):  
Monte Carlo ◽  
Finite Temperature ◽  
Quantum Monte Carlo ◽  
Fermi Liquid ◽  
Quantum Critical Point ◽  
Critical Metals ◽  
Monte Carlo Data ◽  
Low Frequencies ◽  
Self Energy ◽  
Quantum Critical

Abstract Quantum Monte Carlo (QMC) simulations of correlated electron systems provide unbiased information about system behavior at a quantum critical point (QCP) and can verify or disprove the existing theories of non-Fermi liquid (NFL) behavior at a QCP. However, simulations are carried out at a finite temperature, where quantum critical features are masked by finite-temperature effects. Here, we present a theoretical framework within which it is possible to separate thermal and quantum effects and extract the information about NFL physics at T = 0. We demonstrate our method for a specific example of 2D fermions near an Ising ferromagnetic QCP. We show that one can extract from QMC data the zero-temperature form of fermionic self-energy Σ(ω) even though the leading contribution to the self-energy comes from thermal effects. We find that the frequency dependence of Σ(ω) agrees well with the analytic form obtained within the Eliashberg theory of dynamical quantum criticality, and obeys ω2/3 scaling at low frequencies. Our results open up an avenue for QMC studies of quantum critical metals.

scholarly journals Transport Anomalies and Marginal-Fermi-Liquid Effects at a Quantum Critical Point

2000 ◽  
Vol 85 (21) ◽  
pp. 4602-4605 ◽  
Author(s):  
D. Belitz ◽  
T. R. Kirkpatrick ◽  
R. Narayanan ◽  
Thomas Vojta
Keyword(s):  
Critical Point ◽  
Fermi Liquid ◽  
Quantum Critical Point ◽  
Marginal Fermi Liquid ◽  
Quantum Critical

scholarly journals Non-Fermi-liquid types of behavior associated with a magnetic quantum critical point in Sr(Co1−xNix)2As2 single crystals

2019 ◽  
Vol 100 (9) ◽  
Author(s):  
N. S. Sangeetha ◽  
L.-L. Wang ◽  
A. V. Smirnov ◽  
V. Smetana ◽  
A.-V. Mudring ◽  
...  
Keyword(s):  
Critical Point ◽  
Single Crystals ◽  
Fermi Liquid ◽  
Quantum Critical Point ◽  
Quantum Critical

scholarly journals Observing the origin of superconductivity in quantum critical metals

2011 ◽  
Vol 84 (14) ◽  
Author(s):  
J.-H. She ◽  
B. J. Overbosch ◽  
Y.-W. Sun ◽  
Y. Liu ◽  
K. E. Schalm ◽  
...  
Keyword(s):  
Critical Metals ◽  
Quantum Critical

scholarly journals Non-Fermi-liquid behavior of large-NBquantum critical metals

2014 ◽  
Vol 89 (16) ◽  
Author(s):  
A. Liam Fitzpatrick ◽  
Shamit Kachru ◽  
Jared Kaplan ◽  
S. Raghu
Keyword(s):  
Fermi Liquid ◽  
Critical Metals ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

From Kondo semiconductor to a singular non-Fermi liquid via a quantum critical point: The case ofCeRhSb1−xSnx

2005 ◽  
Vol 72 (15) ◽  
Author(s):  
J. Spalek ◽  
A. Ślebarski ◽  
J. Goraus ◽  
L. Spalek ◽  
K. Tomala ◽  
...  
Keyword(s):  
Critical Point ◽  
Fermi Liquid ◽  
Quantum Critical Point ◽  
Kondo Semiconductor ◽  
Quantum Critical
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