Depression of quasiparticle density of states at zero energy in La1.9Sr0.1Cu1-xZnxO4 (2000)
Chang, C. F., Lin, J. -Y., Yand, H. D.
We have measured low-temperature specific heat C(T, H) of La1.9Sr0.1Cu1-xZnxO4 (x=0, 0.01, and 0.02) both in zero and applied magnetic fields. A pronounced dip of C/T below 2 K was first observed in...