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

doi:10.1038/s41467-023-42821-2

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 journal › Article › peer-review

8 Scopus citations

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 ~ 3^o. 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 language	English (US)
Article number	7025
Journal	Nature communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-42821-2
State	Published - Dec 2023

All Science Journal Classification (ASJC) codes

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

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title = "Evidence for two dimensional anisotropic Luttinger liquids at millikelvin temperatures",

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.",

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

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doi = "10.1038/s41467-023-42821-2",

language = "English (US)",

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AU - Yu, Guo

AU - Wang, Pengjie

AU - Uzan-Narovlansky, Ayelet J.

AU - Jia, Yanyu

AU - Onyszczak, Michael

AU - Singha, Ratnadwip

AU - Gui, Xin

AU - Song, Tiancheng

AU - Tang, Yue

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Cava, Robert J.

AU - Schoop, Leslie M.

AU - Wu, Sanfeng

PY - 2023/12

Y1 - 2023/12

N2 - 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.

AB - 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.

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Evidence for two dimensional anisotropic Luttinger liquids at millikelvin temperatures

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