scholarly journals Non-Fermi-liquid behavior at the onset of incommensurate2kFcharge- or spin-density wave order in two dimensions

2014 ◽  
Vol 90 (16) ◽  
Author(s):  
Tobias Holder ◽  
Walter Metzner
Keyword(s):  
Spin Density ◽  
Fermi Liquid ◽  
Density Wave ◽  
Spin Density Wave ◽  
Two Dimensions ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

INTERACTING FERMIONS, SCALING AND POSSIBLE DEPARTURE FROM FERMI LIQUID BEHAVIOR

1995 ◽  
Vol 09 (25) ◽  
pp. 1657-1664 ◽  
Author(s):  
RANJAN CHAUDHURY ◽  
DEBASHIS GANGOPADHYAY
Keyword(s):  
Fermi Liquid ◽  
Two Dimensions ◽  
Low Energy ◽  
Energy Limit ◽  
Realistic Interaction ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

We study fermionic models with realistic interaction in the low energy limit by scaling energies. We show that there exist possibilities for a departure from the Fermi liquid picture in two dimensions.

Non-Fermi-liquid behavior in two dimensions due to long-ranged current-current interactions

1993 ◽  
Vol 48 (15) ◽  
pp. 10766-10776 ◽  
Author(s):  
D. V. Khveshchenko ◽  
R. Hlubina ◽  
T. M. Rice
Keyword(s):  
Fermi Liquid ◽  
Two Dimensions ◽  
Liquid Behavior ◽  
Fermi Liquid Behavior

scholarly journals A new quasi-one-dimensional compound Ba3TiTe5 and superconductivity induced by pressure

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Jun Zhang ◽  
Yating Jia ◽  
Xiancheng Wang ◽  
Zhi Li ◽  
Lei Duan ◽  
...  
Keyword(s):  
High Pressure ◽  
Fermi Liquid ◽  
Density Wave ◽  
Hexagonal Structure ◽  
Characteristic Structure ◽  
One Dimensional ◽  
Starting Point ◽  
Liquid Behavior ◽  
Exotic Physics ◽  
Fermi Liquid Behavior

Abstract We report systematic studies of a new quasi-one-dimensional (quasi-1D) compound, Ba3TiTe5, and the high-pressure induced superconductivity therein. Ba3TiTe5 was synthesized at high pressure and high temperature. It crystallizes into a hexagonal structure (P63/mcm), which consists of infinite face-sharing octahedral TiTe6 chains and Te chains along the c axis, exhibiting a strong 1D characteristic structure. The first-principles calculations demonstrate that Ba3TiTe5 is a well-defined 1D conductor; thus, it can be considered a starting point to explore the exotic physics induced by pressure by enhancing the interchain hopping to move the 1D conductor to a high-dimensional metal. For Ba3TiTe5, high-pressure techniques were employed to study the emerging physics dependent on interchain hopping, such as the Umklapp scattering effect, spin/charge density wave (SDW/CDW), superconductivity and non-Fermi liquid behavior. Finally, a complete phase diagram was plotted. The superconductivity emerges at 8.8 GPa, near which the Umklapp gap is mostly suppressed. Tc is enhanced and reaches a maximum of ~6 K at ~36.7 GPa, where the SDW/CDW is completely suppressed, and a non-Fermi liquid behavior appears. Our results suggest that the appearance of superconductivity is associated with the fluctuation due to the suppression of the Umklapp gap and that the enhancement of the Tc is related to the fluctuation of the SDW/CDW.

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