Two-dimensional materials are ideal candidates to host Charge Density Waves (CDWs) that exhibit paramagnetic limiting behavior, similar to the well-known case of superconductors. Here, we study how CDWs in two-dimensional systems can survive beyond the Pauli limit when they are subjected to a strong magnetic field by developing a generalized mean-field theory of CDWs under Zeeman fields that includes incommensurability, imperfect nesting, and temperature effects and the possibility of a competing or coexisting Spin Density Wave (SDW) order. Our numerical calculations yield rich phase diagrams with distinct high-field phases above the Pauli limiting field. For perfectly nested commensurate CDWs, a -modulated CDW phase that is completely analogous to the superconducting Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) phase appears at high fields. In the more common case of imperfect nesting, the commensurate CDW ground state undergoes a series of magnetic-field-induced phase transitions first into a phase where commensurate CDW and SDW coexist and subsequently into another phase where CDW and SDW acquire a -modulation that is, however, distinct from the pure FFLO CDW phase. The commensurate CDW + SDW phase occurs for fields comparable to but less than the Pauli limit and survives above it. Thus, this phase provides a plausible mechanism for the CDW to survive at high fields without the need for forming the more fragile FFLO phase. We suggest that the recently discovered 2D materials like the transition metal dichalcogenides offer a promising platform for observing such exotic field-induced CDW phenomena.
Skip Nav Destination
Article navigation
28 August 2020
Research Article|
August 24 2020
Charge density waves beyond the Pauli paramagnetic limit in 2D systems
Special Collection:
2D Quantum Materials: Magnetism and Superconductivity
Alex Aperis
;
Alex Aperis
a)
1
Department of Physics and Astronomy, Uppsala University
, P.O. Box 516, SE-75120 Uppsala, Sweden
a)Author to whom correspondence should be addressed: alex.aperis@physics.uu.se
Search for other works by this author on:
Georgios Varelogiannis
Georgios Varelogiannis
2
Department of Physics, National Technical University of Athens
, GR-15780 Athens, Greece
Search for other works by this author on:
a)Author to whom correspondence should be addressed: alex.aperis@physics.uu.se
Note: This paper is part of the Special Topic on 2D Quantum Materials: Magnetism and Superconductivity
J. Appl. Phys. 128, 083901 (2020)
Article history
Received:
May 31 2020
Accepted:
August 02 2020
Citation
Alex Aperis, Georgios Varelogiannis; Charge density waves beyond the Pauli paramagnetic limit in 2D systems. J. Appl. Phys. 28 August 2020; 128 (8): 083901. https://doi.org/10.1063/5.0015993
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Selecting alternative metals for advanced interconnects
Jean-Philippe Soulié, Kiroubanand Sankaran, et al.
Explainable artificial intelligence for machine learning prediction of bandgap energies
Taichi Masuda, Katsuaki Tanabe
Related Content
Knight Shift in the FFLO State of a Two‐Dimensional D‐Wave Superconductor
AIP Conference Proceedings (September 2006)
Emerging evidence for FFLO states in layered organic superconductors (Review Article)
Low Temp. Phys. (March 2013)
Superconductivity in a correlated system of quasiparticles with spin‐dependent masses
AIP Conference Proceedings (November 2010)
Electronic Structure of Vortex in the FFLO Superconducting State
AIP Conference Proceedings (September 2006)
Dynamical structure factor of Fulde-Ferrell-Larkin-Ovchinnikov superconductors
AIP Conference Proceedings (February 2013)