Tomonaga-Luttinger Liquid in a Box: Electrons Confined within MoS2 Mirror-Twin Boundaries

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Helmholtz-Zentrum Dresden Rossendorf
  • Universität zu Köln
  • Westfälische Wilhelms-Universität Münster
  • Forschungszentrum Jülich
  • University of Siegen

Abstract

Two- or three-dimensional metals are usually well described by weakly interacting, fermionic quasiparticles. This concept breaks down in one dimension due to strong Coulomb interactions. There, low-energy electronic excitations are expected to be bosonic collective modes, which fractionalize into independent spin- and charge-density waves. Experimental research on one-dimensional metals is still hampered by their difficult realization, their limited accessibility to measurements, and by competing or obscuring effects such as Peierls distortions or zero bias anomalies. Here we overcome these difficulties by constructing a well-isolated, one-dimensional metal of finite length present in MoS2 mirror-twin boundaries. Using scanning tunneling spectroscopy we measure the single-particle density of the interacting electron system as a function of energy and position in the 1D box. Comparison to theoretical modeling provides unambiguous evidence that we are observing spin-charge separation in real space.

Details

Original languageEnglish
Article number011055
Pages (from-to)1-13
Number of pages13
JournalPhysical Review X
Volume9
Issue number2
Publication statusPublished - 28 Mar 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • SPIN-CHARGE SEPARATION, LUTTINGER, DEFECTS, MODEL

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