Defect-induced supersolidity with soft-core bosons

نویسندگان
چکیده

برای دانلود رایگان 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

Defect-induced supersolidity with soft-core bosons

More than 40 years ago, Andreev, Lifshitz and Chester suggested the possible existence of a peculiar solid phase of matter, the microscopic constituents of which can flow superfluidly without resistance due to the formation of zero-point defects in the ground state of self-assembled crystals. Yet, a physical system where this mechanism is unambiguously established remains to be found, both expe...

متن کامل

Supersolidity, entropy, and frustration: t-t -V model of hard-core bosons on the triangular lattice

We study the properties of t-t -V model of hard-core bosons on the triangular lattice that can be realized in optical lattices. By mapping to the spin-1 /2 XXZ model in a field, we determine the phase diagram of the t-V model where the supersolid characterized by the ordering pattern x ,x ,−2x “ferrimagnetic” or SS A is a ground state for chemical potential 3V. By turning on either temperature ...

متن کامل

Fate of vacancy-induced supersolidity in 4He.

The supersolid state of matter, exhibiting nondissipative flow in solids, has been elusive for 35 years. The recent discovery of a nonclassical moment of inertia in solid 4He by Kim and Chan provided the first experimental evidence, although the interpretation in terms of supersolidity of the ideal crystal phase remains a subject to debate. Using quantum Monte Carlo methods we investigate the l...

متن کامل

Quantum plasticity and dislocation-induced supersolidity

We suggest that below a certain temperature, the free energy for the creation of kinks-antikinks pairs in the dislocation network of solid He becomes negative. The underlying physical mechanism is the related liberation of vacancies which initiate Feynman’s permutation cycles in the bulk. Consequently, dislocations should wander and sweep an increasingly larger volume at low temperatures. This ...

متن کامل

General energy bounds for systems of bosons with soft cores

We study a bound system of N identical bosons interacting by model pair potentials of the form V (r) = λ sgn(p)r + μ r , λ > 0, μ ≥ 0. By using a variational trial function and the ‘equivalent 2-body method’, we find explicit upper and lower bound formulas for the N-particle ground-state energy in arbitrary spatial dimensions d ≥ 3 for the two cases p = 2 and p = −1. It is demonstrated that the...

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: Nature Communications

سال: 2014

ISSN: 2041-1723

DOI: 10.1038/ncomms4235