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VOLUME 84 (2006) | ISSUE 2 | PAGE 95
Interaction of both charge density waves in NbSe3 from interlayer tunneling experiments
PACS: 42.25.Gy, 71.45.Lr, 72.15.Nj, 74.25.Gz
Abstract
Interlayer tunneling technique has been used for spectroscopy of charge density wave (CDW) energy gaps, Δ 1,2, in NbSe3 subsequently opened at the Fermi surface on decreasing temperature at Tp1=145 K (CDW1) and at Tp2=60 K (CDW2). We found that the CDW2 formation is accompanied by an increase of the CDW1 gap below Tp2. The maximum enhancement of Δ 1, δ Δ 1, is about 10%. The effect observed has been predicted theoretically as resulting from the joint phase locking of both CDWs with the underlying crystalline lattice below Tp2.