Electronic structure of carbosulfide superconductors

E. Z. Kurmaev; N. A. Skorikov; A. V. Galakhov; P. F. Karimov; V. R. Galakhov; V. A. Trofimova; Yu. M. Yarmoshenko; A. Moewes; S. G. Chiuzbăian; M. Neumann; K. Sakamaki

doi:10.1103/PhysRevB.71.024528

Electronic structure of carbosulfide superconductors

E. Z. Kurmaev, N. A. Skorikov, A. V. Galakhov, P. F. Karimov, V. R. Galakhov, V. A. Trofimova, Yu. M. Yarmoshenko, A. Moewes, S. G. Chiuzbăian, M. Neumann, K. Sakamaki

DOI 10.1103/PhysRevB.71.024528 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We present electronic band structure calculations and x-ray emission and photoelectron measurements of the recently discovered van der Waals–type layered superconductors Nb2S2C and Cu2∕3Nb2S2C. Good agreement between our local partial density-of-states calculations and our experimental x-ray emission measurements of the constituents as well as between calculated and experimental E(k) dispersion curves is found for Nb2S2C. For Cu2∕3Nb2S2C, we observe a strong interaction between Cu 3d and S 3s3p states that is responsible for shifting the S 3s3p states toward to the bottom of the valence band.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb2S2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.6	Pressure not reported	unknown
Cu2/3Nb2S2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.85	Pressure not reported	unknown