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Evolution of the Fermi Surface of 1T-VSe across a Structural Phase Transition.
Materials (Basel)
September 2024
National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.
Periodic lattice distortion, known as the charge density wave, is generally attributed to electron-phonon coupling. This correlation is expected to induce a pseudogap at the Fermi level in order to gain the required energy for stable lattice distortion. The transition metal dichalcogenide 1T-VSe also undergoes such a transition at 110 K.
View Article and Find Full Text PDFEvolution from a charge-ordered insulator to a high-temperature superconductor in BiSr(Ca,Dy)CuO.
Nat Commun
September 2024
International Center for Quantum Materials, School of Physics, Peking University, Beijing, China.
How Cooper pairs form and condense has been the main challenge in the physics of copper-oxide high-temperature superconductors. Great efforts have been made in the 'underdoped' region of the phase diagram, through doping a Mott insulator or cooling a strange metal. However, there is still no consensus on how superconductivity emerges when electron-electron correlations dominate and the Fermi surface is missing.
View Article and Find Full Text PDFStrain to shine: stretching-induced three-dimensional symmetries in nanoparticle-assembled photonic crystals.
Nat Commun
June 2024
State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Stretching elastic materials containing nanoparticle lattices is common in research and industrial settings, yet our knowledge of the deformation process remains limited. Understanding how such lattices reconfigure is critically important, as changes in microstructure lead to significant alterations in their performance. This understanding has been extremely difficult to achieve due to a lack of fundamental rules governing the rearrangements.
View Article and Find Full Text PDFPseudogap in BaPbBiO( = 0.7, 0.75 and 1.0).
J Phys Condens Matter
October 2023
School of Physical Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh 175005, India.
In this work, we have investigated the crystal and electronic structure of the orthorhombic phase of BaPbBi1-xO(BPBO) for = 0.7 (BPBO70), 0.75 (BPBO75) and 1.
View Article and Find Full Text PDFControl over a Wide Phase Diagram of 2D Correlated Electrons by Surface Doping; K/1-TaS.
Nano Lett
September 2023
Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 37673, Republic of Korea.
We demonstrate the systematic tuning of a trivial insulator into a Mott insulator and a Mott insulator into a correlated metallic and a pseudogap state, which emerge in a quasi-two-dimensional electronic system of 1-TaS through strong electron correlation. The band structure evolution is investigated upon surface doping by alkali adsorbates for two distinct phases occurring at around 220 and 10 K by angle-resolved photoelectron spectroscopy. We find contrasting behaviors upon doping that corroborate the fundamental difference of two electronic states: while the antibonding state of the spin-singlet insulator at 10 K is partially occupied to produce an emerging Mott insulating state, the presumed Mott insulating state at 220 K evolves into a correlated metallic state and then a pseudogap state.
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