Evolution of ultraflat band in the van der Waals kagome semiconductor Pd3P2(S1−xSex

Superconductivity emerging from a pressurized van der Waals kagome material Pd3P2S8

“…The materials with kagome lattice display intriguing and unique quantum phenomena related to geometric frustration, nontrivial band topology and strongly correlation, such as quantum spin liquid state, magnetic Weyl fermions, large intrinsic anomalous Hall effect, tunable local magnetism [4][5][6][7][8][9][10][11]. On the other hand, since the discovery and a great many of studies on the kagome superconductors AV 3 Sb 5 (A = K, Rb, Cs) recently [12][13][14][15][16][17], the exploration of superconductivity in novel kagome compounds is now becoming intriguing and promising.Recently two-dimensional van der Waals (vdW) kagome compound Pd 3 P 2 S 8 which can be successfully cleaved into a single layer, is reported to be a semiconductor at ground state [18,19]. Theoretical studies imply that Pd 3 P 2 S 8 possesses the energy gap ∼1.8 eV for monolayer and ∼1.4 eV for bulk.…”

“…Recently two-dimensional van der Waals (vdW) kagome compound Pd 3 P 2 S 8 which can be successfully cleaved into a single layer, is reported to be a semiconductor at ground state [18,19]. Theoretical studies imply that Pd 3 P 2 S 8 possesses the energy gap ∼1.8 eV for monolayer and ∼1.4 eV for bulk.…”

Pressure-Induced Superconductivity in Flat-Band Kagome Compounds Pd3P2(S1 – x Se x )8

“…[33] An alternative way to look for novel phases is to tune the materials by doping or pressure, [34,35] so that the electrons can be partly delocalized and bring in the electron correlation effect. In this regard, candidate Kagome materials having flat band close to Fermi surface, such as CoSn [9,10,36] and Pd 3 P 2 S 8 , [14,15] are favored for further study by doping or pressure tuning.…”

Observation of Electronic Nematicity Driven by the Three-Dimensional Charge Density Wave in Kagome Lattice KV3Sb5

“…Owing to the intrinsic geometric frustration in real space and nontrivial band topology in reciprocal spaces, compounds with kagome lattices may exhibit various novel quantum states of matter, such as kagome magnet, − flat bands, , fractional Chern insulator states, and superconductivity. ,, In this regard, the recent discovery of a new family of kagome superconductors AV 3 Sb 5 (A = K, Rb, and Cs) has naturally attracted great interest. − Subsequent research reports soon dug out rich exotic states in this family of kagome superconductors, including the nontrivial double-struckZ 2 topological surface states, , strong-coupling superconductivity with possible triplet pairing, ,,, and a giant anomalous Hall effect (AHE) without observable long-range magnetic orders. , …”

“…O wing to the intrinsic geometric frustration in real space and nontrivial band topology in reciprocal spaces, compounds with kagome lattices may exhibit various novel quantum states of matter, such as kagome magnet, 1−8 flat bands, 9,10 fractional Chern insulator states, 11 and superconductivity. 10,12,13 In this regard, the recent discovery of a new family of kagome superconductors AV 3 Sb 5 (A = K, Rb, and Cs) has naturally attracted great interest.…”