Multiband One-Dimensional Electronic Structure and Spectroscopic Signature of Tomonaga-Luttinger Liquid Behavior in 
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Watson, M. D.; Feng, Yu; Nicholson, Christopher W.; Monney, Claude; Riley, J. M.; Iwasawa, Hideaki; Refson, Keith; Sacksteder, Vincent; Adroja, D. T.; Zhao, Jun; Hoesch, Moritz

doi:10.1103/physrevlett.118.097002

Cited by 59 publications

(44 citation statements)

References 41 publications

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“…Such behaviour has been observed in a number of quasi-1D systems, although to date no general explanation has been found for this. Some instances have been attributed to Tomonaga-Luttinger liquid behaviour [43][44][45][46], where all spectral functions are predicted to take a power-law form [47,48], although other signatures of TLL behavior in these materials such as spin-charge separation have proved elusive. In addition, as discussed above, we predict that TLL behavior should only appear at higher temperatures in NbSe 3 once the phase coherence of electronic stats is reduced, restricting them to individual chains.…”

Section: Discussionmentioning

confidence: 99%

Role of a higher-dimensional interaction in stabilizing charge density waves in quasi-one-dimensional NbSe3 revealed by angle-resolved photoemission spectroscopy

et al. 2020

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Utilizing a high energy resolution micro-focused laser with a photon energy of 6.3 eV we investigate charge density waves (CDWs) in the archetypal quasi-1D material NbSe3 using angle-resolved photoemission spectroscopy (ARPES). Doing so allows an exceptionally detailed view into the electronic structure of this complex multi-band system and reveals unambiguously the presence of CDW gaps at the Fermi level (EF). By employing a tight-binding model of the electronic structure, we reveal that the formation of these gaps results from inter-band coupling between electronic states that density functional theory (DFT) finds reside predominantly on separate 1D chains within the material. Two such localized states are found to couple to an electronic state that extends across multiple 1D chains, highlighting the importance of a higher-dimensional environment in stabilizing the CDW ordering in this material. In addition, by investigating the temperature evolution of intra-chain gaps caused by the CDW periodicities far below EF deviate from the behavior expected for a Peierls-like mechanism driven by Fermi nesting; the upper and lower bands of the re-normalized CDW dispersions maintain a fixed peak-to-peak distance while the gaps are gradually removed at higher temperatures. This points towards the gradual loss of long-range phase coherence as the dominant effect in reducing the CDW order parameter which may correspond to the loss of coherence between the coupled chains. Furthermore, one of the gaps is observed above both the known bulk and surface CDW transition temperatures, implying the persistence of short-range incoherent CDW order. Such considerations point to the relevance of a higher-dimensional environment in stabilizing ordered phases in a range of low-dimensional systems. arXiv:1911.00245v2 [cond-mat.str-el]

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Section: Discussionmentioning

confidence: 99%

Role of a higher-dimensional interaction in stabilizing charge density waves in quasi-one-dimensional NbSe3 revealed by angle-resolved photoemission spectroscopy

et al. 2020

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“…More exotically, measurements of the penetration depth find nodes in the superconducting gap while those of the upper critical field (H c2 ) find H c2 to be highly anisotropic, greatly exceed the Pauli-pair-breaking limit, exhibit an in-plane angular dependence and even a possible FuldeFeerel-Larkin-Ovchinnikov (FFLO) state [14][15][16] . Furthermore, recent angle-resolved photoemission spectroscopy reports find linear behavior of the spectral intensity near the FS indicating possible TLL type physics 17 . Yet these findings have found divergent explanations ranging from UNSC with spin-triplet or singlet pairing to conventional phonon driven scenarios 14,18,19 .…”

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confidence: 90%

Coupling of structure to magnetic and superconducting orders in quasi-one-dimensional K2Cr3As3

et al. 2017

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Quasi-one-dimensional A2Cr3As3 (with A = K, Cs, Rb) is an intriguing new family of superconductors which exhibit many similar features to the cuprate and iron-based unconventional superconductor families. Yet in contrast to these systems, no charge or magnetic ordering has been observed which could provide the electronic correlations presumed necessary for an unconventional superconducting pairing mechanism -an absence which defies predictions of first principles models. We report the results of neutron scattering experiments on polycrystalline K2Cr3As3 (Tc ∼ 7K) which probed the low temperature dynamics near Tc. Neutron diffraction data evidence a strong response of the nuclear lattice to the onset of superconductivity while inelastic scattering reveals a highly dispersive column of intensity at the commensurate wavevector q = (00 1 2 ) which loses intensity beneath Tc -indicative of short-range magnetic fluctuations. Using linear spin-wave theory we model the observed scattering and suggest a possible structure to the short-range magnetic order. These observations suggest that K2Cr3As3 is in close proximity to a magnetic instability and that the incipient magnetic order both couples strongly to the lattice and competes with superconductivity -in direct analogy with the iron-based superconductors.PACS numbers: 74.25. Dw, 74.62.Dh, 74.70.Xa, 61.05.fm Understanding how superconductivity arises from myriad competing ground states and exotic phenomena such as quantum criticality has been an overarching theme in the study of unconventional superconductors (UNSC) -particularly in the well-studied quasi-two-dimensional (Q2D) cuprate and iron-based (FBS) families 1 . Recently, a new family of superconducting quasi-one-dimensional (Q1D) A 2 Cr 3 As 3 (233) materials (with A = K, Cs, Rb) have proven fertile grounds for applying this general narrative to another system which has further lowereddimensionality 2,3 .The 233 family orders in non-centrosymmetric hexagonal P 6m2 space group symmetry with a structural motif of double-walled sub-nano tubes (DWS) coaxial to the caxis and of [(Cr 3 As 3 )−2 ] ∞ stoichiometry (see Fig. 1(d)) while the A-site ion acting as a spacer/charge reservoir 'layer' 2,4,5 . DFT calculations predict a Fermi surface built of complex mixtures of the Cr 3d shells with strong Q1D character 3,6,7 . Consequently, predictions of Tomonaga-Luttinger liquid (TLL)/general non-Fermiliquid (nFL) physics, Peierls distortions, ferromagnetic (FM) fluctuations/magnetic ordering and spin-triplet superconductivity have arisen creating a sea of possible ground states and interactions out of which superconductivity stabilizes.3,5,7-10 .Experimentally a similarly complex picture has emerged. nFL behaviors are observed in transport, nuclear magnetic resonance (NMR) and muon spectroscopy (µSR) measurements, which indicate significant electron correlations and strong magnetic fluctuations [11][12][13] . More exotically, measurements of the penetration depth find nodes in the superconducting gap while those of the u...

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“…Interestingly, unlike cuprates, iron pnicites/chalgenides and CrAs which exhibit quasi-2D or 3D crystal structures, A 2 Cr 3 As 3 displays a unique quasi-1D crystal structure [14,15]. Several experimental investigations have led to the conjecture that A 2 Cr 3 As 3 possess unconventional pairing mechanisms, such as the high upper critical field H c2 , the large electronic specific heat coefficient, and a signature of Tomonaga-Luttinger liquid physics [10][11][12][13][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Magnetic ground state of KCr3As3

et al. 2019

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Many unconventional superconductors, such as cuprates and iron-based materials, display spin-glass states in the underdoped regime, which usually coexist and/or compete with unconventional superconductivity. Here, we performed zero-field (ZF) and longitudinal-field (LF) muon spin-rotation experiments (μSR) on quasi-onedimensional KCr 3 As 3. Our ZF μSR measurements reveal a large decrease (about 1/3) in the initial asymmetry below 10 K, indicating the presence of a magnetic phase transition. The analysis of the LF μSR results illustrates this transition at the same temperature, and points it to a spin-glassy state. These results would, potentially, confirm unconventional superconductivity in K-Cr-As and related compounds.

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Multiband One-Dimensional Electronic Structure and Spectroscopic Signature of Tomonaga-Luttinger Liquid Behavior in K2Cr3As

Cited by 59 publications

References 41 publications

Role of a higher-dimensional interaction in stabilizing charge density waves in quasi-one-dimensional NbSe3 revealed by angle-resolved photoemission spectroscopy

Role of a higher-dimensional interaction in stabilizing charge density waves in quasi-one-dimensional NbSe3 revealed by angle-resolved photoemission spectroscopy

Coupling of structure to magnetic and superconducting orders in quasi-one-dimensional K2Cr3As3

Magnetic ground state of KCr3As3

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