●1) Dirac strings狄拉克弦 Spin Ice自旋冰 o 2) Dirac Strings and Magnetic Monopoles in Spin Ice Dy2T1207 1）Dirac Strings 狄拉克弦 Spin Ice 自旋冰  2） Dirac Strings and Magnetic Monopoles in Spin Ice Dy2Ti2O7