2017/09/27 by Amit Ribak, A. Ribak, Itai Silber +8 · 93 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Electron #Ground state #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Mott insulator #Order (exchange) #Paramagnetism #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Strongly correlated material #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.96.195131
published in Physical review. B./Physical review. B 96(19) (American Physical Society)
arxiv created 2017/09/27 · openalex created_date 2017/10/06 · openalex publication_date 2017/11/15 · arxiv updated 2017/11/22 · openalex updated_date 2026/08/05
1T\text\ensuremath-TaS2 is a layered transition-metal dichalcogenide with a very rich phase diagram. At T=180 K it undergoes a metal to Mott insulator transition. Mott insulators usually display antiferromagnetic ordering in the insulating phase but 1T\text\ensuremath-TaS2 was never shown to order magnetically. In this paper we show that 1T\text\ensuremath-TaS2 has a large paramagnetic contribution to the magnetic susceptibility but it does not show any sign of magnetic ordering or freezing down to 20 mK, as probed by muon spin relaxation, possibly indicating a quantum spin liquid ground state. Although 1T\text\ensuremath-TaS2 exhibits a strong resistive behavior both in and out of plane at low temperatures we find a linear term in the heat capacity suggesting the existence of a Fermi surface, which has an anomalously strong magnetic field dependence.