TY - JOUR
T1 - Field-angle-dependent specific heat measurements and gap determination of a heavy fermion superconductor URu2Si2
AU - Yano, K.
AU - Sakakibara, T.
AU - Tayama, T.
AU - Yokoyama, M.
AU - Amitsuka, H.
AU - Homma, Y.
AU - Miranović, P.
AU - Ichioka, M.
AU - Tsutsumi, Y.
AU - Machida, K.
PY - 2008/1/10
Y1 - 2008/1/10
N2 - To identify the superconducting gap structure in URu2Si2, we perform field-angle-dependent specific heat measurements for the two principal orientations in addition to field rotations, and a theoretical analysis based on microscopic calculations. The Sommerfeld coefficient γ(H)'s in the mixed state exhibit a distinctly different field dependence. This comes from point nodes and the substantial Pauli paramagnetic effect of URu2Si2. These two features combined give rise to a consistent picture of superconducting properties, including a possible first order transition of Hc2 at low temperatures.
AB - To identify the superconducting gap structure in URu2Si2, we perform field-angle-dependent specific heat measurements for the two principal orientations in addition to field rotations, and a theoretical analysis based on microscopic calculations. The Sommerfeld coefficient γ(H)'s in the mixed state exhibit a distinctly different field dependence. This comes from point nodes and the substantial Pauli paramagnetic effect of URu2Si2. These two features combined give rise to a consistent picture of superconducting properties, including a possible first order transition of Hc2 at low temperatures.
UR - http://www.scopus.com/inward/record.url?scp=40749146413&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=40749146413&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.100.017004
DO - 10.1103/PhysRevLett.100.017004
M3 - Article
AN - SCOPUS:40749146413
SN - 0031-9007
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
IS - 1
M1 - 017004
ER -