Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl2Mo6Se6

Bergk, B.; Petrović, Alexander Paul; Wang, Zhe; Wang, Y.; Salloum, Diala; Gougeon, P.; Potel, M.; Lortz, Rolf

doi:10.1088/1367-2630/13/10/103018

Cited by 40 publications

(72 citation statements)

References 43 publications

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“…The solid lines exhibit the results obtained with the full Eq. (19). At some values of T cP /T c0 , we see an essential discrepancy between the solid and dashed lines.…”

Section: Resultsmentioning

confidence: 74%

“…Notable examples include the quasi-1D organic Bechgaard salts (TMTSF) 2 X, where anion X is PF 6 , ClO 4 , etc. [1][2][3][4][5][6][7][8], polysulfur nitride (SN x ) [9], the metal-chalcogenidebased compounds [10][11][12][13][14][15], transition-metal carbides [16], the quasi-1D M 2 Mo 6 Se 6 compounds (relatives of the quasi-3D Chevrel phases) [17][18][19], lithium purple bronze [20], and arrays of 4-Å superconducting carbon nanotubes embedded in the linear pores channels of AFI zeolite single crystals [21,22]. Moreover, the analysis of the behavior of the upper critical field, especially for a field oriented in the highly conducting plane formed by a sheet of highly conducting 1D chains can provide information about the nature of superconductivity in these compounds.…”

Section: Introductionmentioning

confidence: 99%

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Peculiarities of the orbital effect in the Fulde-Ferrell-Larkin-Ovchinnikov state in quasi-one-dimensional superconductors

Croitoru

Buzdin

2014

Phys. Rev. B

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Using the quasiclassical formalism, we determine the low-temperature phase diagram of a quasi-onedimensional superconductor, taking into account the interchain Josephson coupling and the paramagnetic spin splitting. We show that the anisotropy of the onset of superconductivity changes in the FFLO state as compared with the conventional superconducting phase. It can result in anomalous peaks in the field-direction dependence of the upper critical field when the magnetic field length equals to the FFLO period. This regime is characterized by the lock-in effect of the FFLO modulation wave vector, which is governed by the magnetic length. Furthermore, in the FFLO phase, the anisotropy of the upper critical field is inverted at T * * 1 = 0.5T c0 , where the orbital anisotropy disappears. We suggest that an experimental study of the anisotropy of the upper critical field can provide very reach information about the parameters of the FFLO phase in quasi-1D samples.

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“…The solid lines exhibit the results obtained with the full Eq. (19). At some values of T cP /T c0 , we see an essential discrepancy between the solid and dashed lines.…”

Section: Resultsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Peculiarities of the orbital effect in the Fulde-Ferrell-Larkin-Ovchinnikov state in quasi-one-dimensional superconductors

Croitoru

Buzdin

2014

Phys. Rev. B

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“…On cooling crystals A – C in a dilution refrigerator, we uncover a two-step superconducting transition characteristic of strongly anisotropic q1D superconductors35363738 (Fig. 4a–c).…”

Section: Resultsmentioning

confidence: 96%

A disorder-enhanced quasi-one-dimensional superconductor

et al. 2016

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A powerful approach to analysing quantum systems with dimensionality d>1 involves adding a weak coupling to an array of one-dimensional (1D) chains. The resultant quasi-1D (q1D) systems can exhibit long-range order at low temperature, but are heavily influenced by interactions and disorder due to their large anisotropies. Real q1D materials are therefore ideal candidates not only to provoke, test and refine theories of strongly correlated matter, but also to search for unusual emergent electronic phases. Here we report the unprecedented enhancement of a superconducting instability by disorder in single crystals of Na2−δMo6Se6, a q1D superconductor comprising MoSe chains weakly coupled by Na atoms. We argue that disorder-enhanced Coulomb pair-breaking (which usually destroys superconductivity) may be averted due to a screened long-range Coulomb repulsion intrinsic to disordered q1D materials. Our results illustrate the capability of disorder to tune and induce new correlated electron physics in low-dimensional materials.

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“…length and the separation of the chains, they can have a weak transverse coupling via the Josephson or proximity effect, respectively [8,10,13]. The confinement of a superconducting material in a small dimensionality can have some interesting effects [14][15][16][17][18][19][20][21][22].…”

mentioning

confidence: 99%

The role of the coherence length for the establishment of global phase coherence in arrays of ultra-thin superconducting nanowires

Wong¹,

Lam²,

Shen³

et al. 2017

Supercond. Sci. Technol.

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We have fabricated 5 nm ultra-thin NbN nanowires that form a dense and regular array in the linear channels of mesoporous SBA-15 silica substrates. Bulk NbN is a well-known classical superconductor with Tc of 16 K. We show that, by being incorporated into this nanostructure, the composite material exhibits typical quasi-one-dimensional characteristics. We compare the superconducting properties with those of superconducting Pb nanowires of same dimensionality in identical configuration within the linear SBA-15 pores. While Pb nanowire arrays show a pronounced crossover from 1D superconductivity at high temperatures to a 3D bulk superconducting state in the low temperature regime with true zero resistance triggered by transversal Josephson interaction, this transition appears to be completely absent in the NbN nanowire array. The small coherence length in NbN, which strongly suppresses the Josephson coupling is discussed as the origin of this difference.A quasi one-dimensional (quasi-1D) superconductor is a superconducting material which is confined in a 1D geometry of lateral dimensionality equal to or less than the superconducting coherence length of the corresponding bulk material [1,2]. Such nanowires or linear atomic chains can either be realized in the form of individual free-standing nanowires [2,3], or can be arranged to form an array of parallel 1D nano-elements [1,[4][5][6][7]. The latter was realized in the form of artificially grown nanostructures [1,5,6,8,9] or found in intrinsic quasi-1D superconducting materials such as Tl2Mo6Se6 [10] or Sc3CoC4 [11,12]. The latter contain many parallel conducting 1D atomic chains separated by either insulating layers or a non-superconducting metallic host. Dependent on the superconducting coherence

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Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl₂Mo₆Se₆

Cited by 40 publications

References 43 publications

Peculiarities of the orbital effect in the Fulde-Ferrell-Larkin-Ovchinnikov state in quasi-one-dimensional superconductors

Peculiarities of the orbital effect in the Fulde-Ferrell-Larkin-Ovchinnikov state in quasi-one-dimensional superconductors

A disorder-enhanced quasi-one-dimensional superconductor

The role of the coherence length for the establishment of global phase coherence in arrays of ultra-thin superconducting nanowires

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