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Japanese | English (Top page)
“úŽž: | •½¬21”N9ŒŽ17“ú(–Ø) 15:00` |
Date and time: | 17th September (Tue.) 15:00` |
êŠ: | •ºŒÉŒ§—§‘åŠw—Šw•”@Œ¤‹†“‚VŠK’k˜bŽºi739†Žºj |
Place: | University of Hyogo, Lecture room (room 739) 7F |
Title: | Self-Masking of Spontaneous Symmetry Breaking in Layer Materials |
u‰‰ŽÒ: | ŽR£”Ž”V @Ži•¨Þ‹@\j |
Speaker: | Dr. Hiroyuki Yamase@(NIMS) |
Abstract: |
We study d-wave Fermi-surface deformations (dFSD), the so-called Pomeranchuk instability, on bilayer and infinite-layer square lattices. Since the order parameter of the dFSD has Ising symmetry, there are two stacking patterns along the c axis: (+, +) and (+, -). We find that, as long as the c axis dispersion is finite at the saddle points of the in-plane band dispersion, the (+, -) stacking is usually favored independently on the details of interlayer coupling, yielding no macroscopic anisotropy. The dFSD provides unique spontaneous symmetry breaking that is self-masked in layer materials.
[1] H. Yamase: Phys. Rev. Lett. 102, 116404 (2009).