Abstract：
:Charge density wave (CDW), the periodic modulation of the electronic charge density, will open a gap on the Fermi surface that commonly leads to decreased or vanishing conductivity. On the other hand superconductivity, a commonly believed competing order, features a Fermi surface gap that results in infinite conductivity. Here we report that superconductivity emerges upon Se doping in CDW conductor ZrTe3 when the long range CDW order is gradually suppressed. Superconducting critical temperature Tc(x) in ZrTe3-xSex (0 ≤ x ≤ 0.1) increases up to 4 K plateau for 0.04 ≤ x ≤ 0.07. Further increase in Se content results in diminishing Tc and filametary superconductivity. The CDW modes from Raman spectra are observed in x = 0.04 and 0.1 crystals, where signature of ZrTe3 CDW order in resistivity vanishes. The electronic-scattering for high Tc crystals is dominated by local CDW fluctuations at high temperatures, the resistivity is linear up to highest measured T = 300 K and contributes to substantial in-plane anisotropy.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhu X,Ning W,Li L,Ling L,Zhang R,Zhang J,Wang K,Liu Y,Pi L,Ma Y,Du H,Tian M,Sun Y,Petrovic C,Zhang Ydoi
10.1038/srep26974subject
Has Abstractpub_date
2016-06-02 00:00:00pages
26974issn
2045-2322pii
srep26974journal_volume
6pub_type
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