Manifestation of spin degrees of freedom in the double fractional quantum Hall system.
نویسندگان
چکیده
The double fractional quantum Hall system of spin 1/2 electrons is numerically studied to predict that there exists a novel spin-unpolarized quantum liquid specific to the multi-species system, which exemplifies a link between the spin state and the inter-layer electron correlation. Even when the ground state is spin-polarized, the lowest charge-excitation mode involves the spin when the interlayer tunneling is considered. PACS numbers: 73.40.Hm.
منابع مشابه
Domain Formation in ν = 2 / 3 Fractional Quantum Hall Systems
We study the domain formation in the ν = 2/3 fractional quantum Hall systems basing on the density matrix renormalization group (DMRG) analysis. The ground-state energy and the pair correlation functions are calculated for various spin polarizations. The results confirm the domain formation in partially spin polarized states, but the presence of the domain wall increases the energy of partially...
متن کامل1 6 D ec 1 99 6 Invariant structure of the hierarchy theory of fractional quantum Hall states with spin
We describe the invariant structure common to abelian fractional quantum Hall effect systems with spin. It appears in a generalization of the lattice description of the polarized hierarchy that encompasses both partially polarized and unpolarized ground state systems. We formulate, using the spin-charge decomposition, conditions that should be satisfied so that the description is SU(2) invarian...
متن کاملSpin-Hall effect with quantum group symmetries
We construct a model of spin-Hall effect on a noncommutative four sphere S4 θ with isospin degrees of freedom, coming from a noncommutative instanton, and invariance under a quantum group SOθ(5). The corresponding representation theory allows to explicitly diagonalize the Hamiltonian and construct the ground state; there are both integer and fractional excitations. Similar models exist on highe...
متن کاملسیستمهای الکترونی همبسته قوی در شبکه‌های ناکام
We give an overview of recent work on charge degrees of freedom of strongly correlated electrons on geometrically frustrated lattices. Special attention is paid to the checkerboard lattice, i.e., the two-dimensional version of a pyrochlore lattice and to the kagomé lattice. For the checkerboard lattice it is shown that at half filling when spin degrees of freedom are neglected and at quarter f...
متن کاملNonlocal Polarization Feedback in a Fractional Quantum Hall Ferromagnet.
In a quantum Hall ferromagnet, the spin polarization of the two-dimensional electron system can be dynamically transferred to nuclear spins in its vicinity through the hyperfine interaction. The resulting nuclear field typically acts back locally, modifying the local electronic Zeeman energy. Here we report a nonlocal effect arising from the interplay between nuclear polarization and the spatia...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review. B, Condensed matter
دوره 51 12 شماره
صفحات -
تاریخ انتشار 1995