TY - JOUR
T1 - Tunable Non-Fermi Liquid Phase from Coupling to Two-Level Systems
AU - Bashan, Noga
AU - Tulipman, Evyatar
AU - Schmalian, Jörg
AU - Berg, Erez
N1 - Publisher Copyright: © 2024 American Physical Society.
PY - 2024/6/7
Y1 - 2024/6/7
N2 - We study a controlled large-N theory of electrons coupled to dynamical two-level systems (TLSs) via spatially random interactions. Such a physical situation arises when electrons scatter off low-energy excitations in a metallic glass, such as a charge or stripe glass. Our theory is governed by a non-Gaussian saddle point, which maps to the celebrated spin-boson model. By tuning the coupling strength we find that the model crosses over from a Fermi liquid at weak coupling to an extended region of non-Fermi liquid behavior at strong coupling, and realizes a marginal Fermi liquid at the crossover. Our results are valid for generic space dimensions d>1.
AB - We study a controlled large-N theory of electrons coupled to dynamical two-level systems (TLSs) via spatially random interactions. Such a physical situation arises when electrons scatter off low-energy excitations in a metallic glass, such as a charge or stripe glass. Our theory is governed by a non-Gaussian saddle point, which maps to the celebrated spin-boson model. By tuning the coupling strength we find that the model crosses over from a Fermi liquid at weak coupling to an extended region of non-Fermi liquid behavior at strong coupling, and realizes a marginal Fermi liquid at the crossover. Our results are valid for generic space dimensions d>1.
UR - http://www.scopus.com/inward/record.url?scp=85195265964&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.132.236501
DO - 10.1103/PhysRevLett.132.236501
M3 - مقالة
SN - 0031-9007
VL - 132
JO - Physical review letters
JF - Physical review letters
IS - 23
M1 - 236501
ER -