Quasi-one-dimensional metallic band dispersion in the commensurate charge density wave of 1T-TaS2

TY - JOUR

T1 - Quasi-one-dimensional metallic band dispersion in the commensurate charge density wave of 1T-TaS2

AU - Ngankeu, Arlette Sohanfo

AU - Mahatha, Sanjoy Kr

AU - Guilloy, Kevin

AU - Bianchi, Marco

AU - Sanders, Charlotte

AU - Hanff, Kerstin

AU - Rossnagel, Kai

AU - Miwa, Jill

AU - Nielsen, Christina Breth

AU - Bremholm, Martin

AU - Hofmann, Philip

PY - 2017/11/27

Y1 - 2017/11/27

N2 - The commensurate charge-density wave (CDW) in the layered compound 1T-TaS2 has hitherto mostly been treated as a quasi-two-dimensional phenomenon. Recent band structure calculations have, however, predicted that the CDW coexists with a nearly one-dimensional metallic dispersion perpendicular to the crystal planes. Using synchrotron radiation-based angle-resolved photoemission spectroscopy, we show that this metallic band does in fact exist. Its occupied band width is in excellent agreement with predictions for a simple τc stacking order of the CDW between adjacent layers, and its periodicity in the c direction is 2π/c.

AB - The commensurate charge-density wave (CDW) in the layered compound 1T-TaS2 has hitherto mostly been treated as a quasi-two-dimensional phenomenon. Recent band structure calculations have, however, predicted that the CDW coexists with a nearly one-dimensional metallic dispersion perpendicular to the crystal planes. Using synchrotron radiation-based angle-resolved photoemission spectroscopy, we show that this metallic band does in fact exist. Its occupied band width is in excellent agreement with predictions for a simple τc stacking order of the CDW between adjacent layers, and its periodicity in the c direction is 2π/c.

U2 - 10.1103/PhysRevB.96.195147

DO - 10.1103/PhysRevB.96.195147

M3 - Journal article

SN - 2469-9950

VL - 96

JO - Physical Review B

JF - Physical Review B

IS - 19

M1 - 195147

ER -