Charge-Order-Driven Spin-Peierls Transition inα′−NaxV2O5

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Spin-Peierls transition in TiPO4

The complex interplay between charge, orbital, spin and lattice degrees of freedom in low-dimensional systems with pronounced quantum fluctuations allows for a plethora of complex and unusual ground states. Most of the prominent examples of low-dimensional quantum antiferromagnets with exotic ground states contain Cu (3d, S = 1/2) ions with one hole present in the eg orbitals. Compounds of earl...

متن کامل

Charge Ordering and Spin-peierls Transition in Α'-nav 2 O 5

Recent X-ray analysis and NMR experiments have shown that α’-NaV2O5 is not a conventional spin-Peierls (SP) compound because above the transition at 33K it is in a homogeneous mixed valent (MV) state and uniform spin chains do not exist. Furthermore, thermal expansion experiments have identified the existence of a double phase transition. We present a theoretical model which qualitatively expla...

متن کامل

Enhanced dimerization of TiOCl under pressure: spin-Peierls to Peierls transition.

We report x-ray diffraction and magnetization measurements under pressure combined with ab initio calculations to show that high-pressure TiOCl corresponds to an enhanced Ti3+-Ti3+ dimerized phase existing already at room temperature. Our results demonstrate the formation of a metal-metal bond between Ti3+ ions along the b axis of TiOCl, accompanied by a strong reduction of the electronic gap. ...

متن کامل

Frustrated spin-Peierls chains.

We study the phase diagram, ground state properties, and excitation gaps of a frustrated spin-Peierls chain, i.e. a spin-Peierls chain with both nearest neighbor exchange J1 and next nearest neighbor exchange J2. The phase diagram is calculated using a bosonization Renormalization-Group (RG) method. We propose a (bosonic) bond-operator mean field approximation to calculate the ground state prop...

متن کامل

Local spin resonance and spin-peierls-like phase transition in a geometrically frustrated antiferromagnet

Inelastic magnetic neutron scattering reveals a localized spin resonance at 4.5 meV in the ordered phase of the geometrically frustrated cubic antiferromagnet ZnCr2O4. The resonance develops abruptly from quantum critical fluctuations upon cooling through a first order transition to a co-planar antiferromagnet at T(c) = 12. 5(5) K. We argue that this transition is a three dimensional analog of ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review Letters

سال: 2000

ISSN: 0031-9007,1079-7114

DOI: 10.1103/physrevlett.84.4176