仲云雷

Author(s): Marco Gandolfi, Claudio Giannetti, and Francesco Banfi

The temperonic crystal, a periodic structure with a unit cell made of two slabs sustaining temperature wavelike oscillations on short timescales, is introduced. The complex-valued dispersion relation for the temperature scalar field is investigated for the case of a localized temperature pulse. The ...

[Phys. Rev. Lett. 125, 265901] Published Thu Dec 31, 2020

Author(s): Yafei Ren, Qiang Gao, A. H. MacDonald, and Qian Niu

Graphene bilayers exhibit zero-energy flatbands at a discrete series of magic twist angles. In the absence of intrasublattice interlayer hopping, zero-energy states satisfy a Dirac equation with a non-Abelian SU(2) gauge potential that cannot be diagonalized globally. We develop a semiclassical WKB ...

[Phys. Rev. Lett. 126, 016404] Published Wed Jan 06, 2021

Author(s): Zhao Liu, Ahmed Abouelkomsan, and Emil J. Bergholtz

We predict twisted double bilayer graphene to be a versatile platform for the realization of fractional Chern insulators readily targeted by tuning the gate potential and the twist angle. Remarkably, these topologically ordered states of matter, including spin singlet Halperin states and spin polari...

[Phys. Rev. Lett. 126, 026801] Published Tue Jan 12, 2021

Author(s): Zheng Chen, Zhongran Liu, Yanqiu Sun, Xiaoxin Chen, Yuan Liu, Hui Zhang, Hekang Li, Meng Zhang, Siyuan Hong, Tianshuang Ren, Chao Zhang, He Tian, Yi Zhou, Jirong Sun, and Yanwu Xie

We report on the observation of a Tc∼0.9  K superconductivity at the interface between LaAlO3 film and the 5d transition metal oxide KTaO3(110) single crystal. The interface shows a large anisotropy of the upper critical field, and its superconducting transition is consistent with a Berezinskii-Kost...

[Phys. Rev. Lett. 126, 026802] Published Wed Jan 13, 2021

Author(s): Mu Qiao, Ye Wang, Zhengyang Cai, Botao Du, Pengfei Wang, Chunyang Luan, Wentao Chen, Heung-Ryoul Noh, and Kihwan Kim

We theoretically and experimentally investigate double-electromagnetically-induced transparency (double-EIT) cooling of two-dimensional ion crystals confined in a Paul trap. The double-EIT ground-state cooling is observed for Yb171+ ions with a clock state, for which EIT cooling has not been realize...

[Phys. Rev. Lett. 126, 023604] Published Wed Jan 13, 2021

Author(s): Oskar Vafek and Jian Kang

We develop a two stage renormalization group which connects the continuum Hamiltonian for twisted bilayer graphene at length scales shorter than the moire superlattice period to the Hamiltonian for the active narrow bands only which is valid at distances much longer than the moire period. In the fir...

[Phys. Rev. Lett. 125, 257602] Published Fri Dec 18, 2020

Author(s): Luis Brey, T. Stauber, T. Slipchenko, and L. Martín-Moreno

We discuss plasmons of biased twisted bilayer graphene when the Fermi level lies inside the gap. The collective excitations are a network of chiral edge plasmons (CEP) entirely composed of excitations in the topological electronic edge states that appear at the AB-BA interfaces. The CEP form a hexag...

[Phys. Rev. Lett. 125, 256804] Published Fri Dec 18, 2020

Author(s): P. A. Nosov, I. S. Burmistrov, and S. Raghu

The interplay of interactions and disorder in two-dimensional (2D) electron systems has actively been studied for decades. The paradigmatic approach involves starting with a clean Fermi liquid and perturbing the system with both disorder and interactions. Instead, we start with a clean non-Fermi liq...

[Phys. Rev. Lett. 125, 256604] Published Fri Dec 18, 2020

Author(s): Shuzhe Shi, Hui Zhang, Defu Hou, and Jinfeng Liao

Quantum anomaly is a fundamental feature of chiral fermions. In chiral materials, the microscopic anomaly leads to nontrivial macroscopic transport processes such as the chiral magnetic effect (CME), which has been in the spotlight lately across disciplines of physics. The quark-gluon plasma (QGP) c...

[Phys. Rev. Lett. 125, 242301] Published Wed Dec 09, 2020