Journal
PHYSICAL REVIEW LETTERS
Volume 100, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.247005
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We have systematically investigated the global phase diagram for Li(x)M(y)HfNCl (M: molecule), demonstrating the independent controllability of carrier density x and interlayer spacing d. In Li(x)HfNCl, the superconducting phase with almost constant T(c) of 20 K prevails for 0.15 <= x <= 0.50. Accompanied by an increase in d upon the cointercalation, an enhancement of T(c) up to 30% was observed with its x independence preserved. This result indicates that pairing interaction strongly depends on the Fermi surface warping along the k(z) direction, implying the relevance of charge and/or spin fluctuation.
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