Despite being arguably the simplest and best characterized quasi-2D charge-density-wave (CDW) systems, the rare-earth tritellurides ($R$Te$_3$) continue to yield surprising experimental results, including recent evidence suggestive of mirror-symmetry breaking associated with the onset of CDW order. Motivated by this, we consider a 2D electron-phonon model for a single Te square-net plane, which we analyze using mean-field theory. For an appropriate region of parameter space, we find a finite-temperature continuous transition from the normal state to a unidirectional CDW state with an ordering vector matching that observed experimentally. At lower temperatures, we find a second translation-symmetry-breaking transition, similar to what occurs in $R$Te$_3$ compounds with heavier rare-earth elements. In certain parameter regimes, we also find an intervening mirror-symmetry-breaking transition occurring between the two transitions described above. These results reveal an intrinsic susceptibility to mirror-symmetry breaking in the unidirectional CDW phase, which is relevant to understanding recent experiments on the $R$Te$_3$ compounds.
Over the past decade, studies revisiting the classical charge-density-wave system 1T-TiSe$_2$, long understood to host the $2 \times 2$ triple-$q$ order with equivalent subcomponents, have suggested that these subcomponents may not be identical, challenging a 50-year-old paradigm. Here, we demonstrate not only that the...
Kimoon Han, Dongju Hwang, Dongsin Kim et al.· Nature Communications· 0 citations
Chiral $p$-wave superconductors and superfluids are central model systems in the search for topological quantum matter, but in reduced dimensions their properties are inseparable from the boundary conditions imposed by surrounding surfaces. Superfluid $^3$He provides a uniquely clean, well-established spin-triplet $p$-...
Daksh Malhotra, Aymar Muhikira, A. Shook et al.· 0 citations
Motivated by the unique characteristics of the phase diagram of 1T-TiSe2, we investigated the complex interplay of excitonic charge density wave (CDW) and superconductivity (SC) on a two-dimensional triangular lattice, each site accommodating two orbitals. In response to various tuning parameters, such as intercalation...
Two-dimensional van der Waals materials host a variety of intertwined quantum phases, whose deterministic control remains a central challenge. The rare-earth tritellurides (
R
Te
3
), a model system for charge density wave (CDW) physics, offer a unique platform to study the response of a collective electronic o...
Xin Zheng, Yun-Bo Wu, Tong-Rui Li et al.· npj Quantum Materials· 0 citations
Charge orders in the kagome metals AV$_3$Sb$_5$ sit at the center of a rich phase diagram that also includes superconductivity, nematicity, and signatures of time-reversal-symmetry breaking. Yet even the basic question of which charge ordering wave vectors are intrinsic, and which are selected by dimensionality and lat...
M. M. Mahi, Quazi D. M. Khosru, M. Hasan et al.· PHYSICAL REVIEW MATERIALS· 0 citations
Electronic phases of matter, such as magnetism and superconductivity, are defined and distinguished by their order parameters quantifying the spontaneous symmetry breaking underlying each phase. Simple cases include the uniform magnetization of ferromagnets1,2 and the isotropic gap function of conventional superconduct...
M. Long, T. I. Weinberger, Zhe-Yu Wu et al.· Nature· 9 citations· ⚡1
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