Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Varma, Chandra M."'
Autor:
Raghu, Srinivas, Varma, Chandra M.
Shot-noise measures the correlations of fluctuations of current for a voltage applied much larger than the temperature and reveals aspects of correlations in fermions beyond those revealed in the conductivity. Recent measurements of shot-noise in the
Externí odkaz:
http://arxiv.org/abs/2409.10798
Autor:
Varma, Chandra M., Wang, Ziqiang
The superconducting state with the usual 2e-flux quantization formed from a normal state with 3Q charge density or loop-current order is a linear combination of 3 different paired states with an overall gauge invariant phase and two internal phases s
Externí odkaz:
http://arxiv.org/abs/2307.00448
Autor:
Varma, Chandra M.
Glassy matter like crystals resists change in shape. Therefore a theory for their continuous melting should show how the shear elastic constant $\mu$ goes to zero. Since viscosity is the long wave-length low frequency limit of shear correlations, the
Externí odkaz:
http://arxiv.org/abs/2208.11648
Autor:
Shekhter, Arkady, Varma, Chandra M.
Publikováno v:
Phys. Rev. B 106, 214419 (2022)
We present Hartree-Fock calculations on a simple model to obtain the conditions of formation of local magnetic moments due to loop-currents $L_o$ and spin-loop currents $L_s$ and compare them to the conditions of formation of local spin-moments $M$ w
Externí odkaz:
http://arxiv.org/abs/2208.05587
Autor:
Maebashi, Hideaki, Varma, Chandra M.
We present exact results for the electrical and thermal conductivity and Seebeck coefficient at low temperatures and frequencies in the quantum-critical region for fermions on a lattice scattering with the collective fluctuations of the quantum xy mo
Externí odkaz:
http://arxiv.org/abs/2207.11982
Autor:
Varma, Chandra M.
Publikováno v:
Phys. Rev. Letters {\bf 128}, 206601 (2022)
Resistivity in the quantum-critical fluctuation region of several metallic compounds such as the cuprates, the heavy-fermions, Fe-chalogenides and pnictides, twisted bi-layer graphene and WSe$_2$, is linear in temperature $T$ as well as in a magnetic
Externí odkaz:
http://arxiv.org/abs/2112.12783
Autor:
Yang, Yanxing, Li, Xin, Tan, Cheng, Zhu, Zihao, Zhang, Jian, Ding, Zhaofeng, Wu, Qiong, Chen, Changshen, Shiroka, Toni, Xia, Yuanhua, MacLaughlin, Douglas E., Varma, Chandra M., Shu, Lei
Quantum fluctuations are expected to lead to highly entangled spin-liquid states in certain two-dimensional spin-1/2 compounds. We have synthesized and measured thermodynamic properties and muon spin relaxation rates in the copper-based two-dimension
Externí odkaz:
http://arxiv.org/abs/2102.09271
We deduce the symmetry of the pseudogap state in the single and double layer bismuth-based cuprate superconductors by measuring and analyzing their circular and linear photogalvanic responses, which are related linearly to the chirality and inversion
Externí odkaz:
http://arxiv.org/abs/2011.06755
Autor:
Varma, Chandra M.
Publikováno v:
Phys. Rev. B 102, 075113 (2020)
The conjecture made recently by the group at Sherbrooke, that their observed anomalous thermal Hall effect in the pseudo-gap phase in the cuprates is due to phonons, is supported on the basis of an earlier result that the observed loop-current order
Externí odkaz:
http://arxiv.org/abs/2003.11130
Autor:
Song, Jingjin, Patel, Sheena K. K., Bhattacharya, Rupak, Yang, Yi, Pandey, Sudip, Chen, Xiao M., Maple, M. Brian, Fullerton, Eric E., Roy, Sujoy, Mazzoli, Claudio, Varma, Chandra M., Sinha, Sunil K.
In the 1970s a new paradigm was introduced that interacting quenched systems, such as a spin-glass, have a phase transition in which long time memory of spatial patterns is realized without spatial correlations. The principal methods to study the spi
Externí odkaz:
http://arxiv.org/abs/2002.04259