Ferroic Berry Curvature Dipole in a Topological Crystalline Insulator at Room Temperature

Abstract

The physics related to Berry curvature is now a central research topic in condensed matter physics. The Berry curvature dipole (BCD) is a significant and intriguing condensed matter phenomenon that involves inversion symmetry breaking. However, the creation and controllability of BCDs have so far been limited to far below room temperature (RT) and non-volatile (i.e., ferroic) BCDs have not yet been discovered, hindering further progress in topological physics. In this work, we demonstrate a switchable and non-volatile BCD effect at RT in a topological crystalline insulator, Pb1-xSnxTe (PST), which is attributed to ferroic distortion. Surprisingly, the magnitude of the ferroic BCD is several orders of magnitude greater than that of the non-ferroic BCDs that appear, for example, in transition metal dichalcogenides. The discovery of this ferroic and extraordinarily large BCD in PST could pave the way for further progress in topological material science and the engineering of novel topological devices.

arXiv comment23 pages, 3 figures

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Cited by in corpus (8)

• Tunable moiré materials for probing Berry physics and topology
• Non-linear Hall Effects: Mechanisms and Materials
• Non-linear Transport in Non-centrosymmetric Systems: From Fundamentals to Applications
• Odd non-linear conductivity under spatial inversion in chiral Tellurium
• Symmetry Origin and Microscopic Mechanism of Electrical Magnetochiral Anisotropy in Tellurium
• Reconstruction, rumpling, and Dirac states at the (001) surface of a topological crystalline insulator Pb1-xSnxSe
• Chirality-tunable non-linear Hall effect
• Berry Curvature Dipole-Induced Chiral Terahertz Gain and Lasing Threshold in Bulk Tellurium