Evidence for two dimensional anisotropic Luttinger liquids at millikelvin temperatures

Guo Yu, Pengjie Wang, Ayelet J. Uzan-Narovlansky, Yanyu Jia, Michael Onyszczak, Ratnadwip Singha, Xin Gui, Tiancheng Song, Yue Tang, Kenji Watanabe, Takashi Taniguchi, Robert J. Cava, Leslie M. Schoop, Sanfeng Wu

Research output: Contribution to journalArticlepeer-review

Abstract

Interacting electrons in one dimension (1D) are governed by the Luttinger liquid (LL) theory in which excitations are fractionalized. Can a LL-like state emerge in a 2D system as a stable zero-temperature phase? This question is crucial in the study of non-Fermi liquids. A recent experiment identified twisted bilayer tungsten ditelluride (tWTe2) as a 2D host of LL-like physics at a few kelvins. Here we report evidence for a 2D anisotropic LL state down to 50 mK, spontaneously formed in tWTe2 with a twist angle of ~ 3o. While the system is metallic-like and nearly isotropic above 2 K, a dramatically enhanced electronic anisotropy develops in the millikelvin regime. In the anisotropic phase, we observe characteristics of a 2D LL phase including a power-law across-wire conductance and a zero-bias dip in the along-wire differential resistance. Our results represent a step forward in the search for stable LL physics beyond 1D.

Original languageEnglish (US)
Article number7025
JournalNature communications
Volume14
Issue number1
DOIs
StatePublished - Dec 2023

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • General Chemistry
  • General Biochemistry, Genetics and Molecular Biology

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