Showing 2016 · cond-mat.str-elShow all

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cond-mat.str-el2016★ 100 cited

Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling

S. Dzsaber, L. Prochaska, A. Sidorenko +6

Recent theoretical studies of topologically nontrivial electronic states in Kondo insulators have pointed to the importance of spin-orbit coupling (SOC) for stabilizing these state…

cond-mat.str-el2016★ 168 cited

Weyl-Kondo Semimetal in Heavy Fermion Systems

Hsin-Hua Lai, Sarah E. Grefe, Silke Paschen +1

Insulating states can be topologically nontrivial, a well-established notion that is exemplified by the quantum Hall effect and topological insulators. By contrast, topological met…

cond-mat.str-el2016★ 4 cited

Dynamic zero modes of Dirac fermions and competing singlet phases of antiferromagnetic order

Pallab Goswami, Qimiao Si

In quantum spin systems, singlet phases often develop in the vicinity of an antiferromagnetic order. Typical settings for such problems arise when itinerant fermions are also prese…

cond-mat.str-el2016★ 39 cited

Merging symmetry projection methods with coupled cluster theory: Lessons from the Lipkin model Hamiltonian

Jacob M Wahlen-Strothman, Thomas M. Henderson, Matthew R. Hermes +5

Coupled cluster and symmetry projected Hartree-Fock are two central paradigms in electronic structure theory. However, they are very different. Single reference coupled cluster is…

cond-mat.str-el2016★ 136 cited

Direct observation of how the heavy fermion state develops in CeCoIn5

Q. Y. Chen, D. F. Xu, X. H. Niu +19

Heavy fermion materials gain high electronic masses and expand Fermi surfaces when the high-temperature localized f electrons become itinerant and hybridize with the conduction ban…

cond-mat.str-el2016★ 45 cited

Thickness-Dependent and Magnetic-Field-Driven Suppression of Antiferromagnetic Order in Thin VS Single Crystals

Will J. Hardy, Jiangtan Yuan, Hua Guo +3

With materials approaching the 2d limit yielding many exciting systems with intriguing physical properties and promising technological functionalities, understanding and engineerin…

cond-mat.str-el2016★ 7 cited

Biorthogonal projected energies of a Gutzwiller similarity transformed Hamiltonian

Jacob M. Wahlen-Strothman, Gustavo E. Scuseria

We present a method incorporating biorthogonal orbital-optimization, symmetry projection, and double-occupancy screening with a non-unitary similarity transformation generated by t…

cond-mat.str-el2016★ 136 cited

Interacting Weyl fermions: Phases, phase transitions and global phase diagram

Bitan Roy, Pallab Goswami, Vladimir Juricic

We study the effects of short-range interactions on a generalized three-dimensional Weyl semimetal, where the band touching points act as the (anti)monopoles of Abelian Berry curva…

cond-mat.str-el2016★ 30 cited

Projected Hartree Fock Theory as a Polynomial Similarity Transformation Theory of Single Excitations

Yiheng Qiu, Thomas M. Henderson, Gustavo E. Scuseria

Spin-projected Hartree-Fock is introduced as a particle-hole excitation ansatz over a symmetry-adapted reference determinant. Remarkably, this expansion has an analytic expression…

cond-mat.str-el2016★ 20 cited

NaFeCuAs: A pnictide insulating phase induced by on-site Coulomb interaction

C. E. Matt, N. Xu, B. Q. Lv +13

In the studies of iron-pnictides, a key question is whether their bad-metal state from which the superconductivity emerges lies in close proximity with a magnetically ordered insul…

cond-mat.str-el2016★ 34 cited

Spin waves and magnetic exchange interactions in the spin ladder compound RbFeSe

Meng Wang, Ming Yi, Shangjian Jin +9

We report an inelastic neutron scattering study of the spin waves of the one-dimensional antiferromagnetic spin ladder compound RbFeSe. The results reveal that the products…

cond-mat.str-el2016★ 1 cited

Unified Spin Model for Magnetic Excitations in Iron Chalcogenides

Patricia Bilbao Ergueta, Wen-Jun Hu, Andriy H. Nevidomskyy

Recent inelastic neutron scattering (INS) measurements on FeSe and Fe(TeSe), have sparked intense debate over the nature of the ground state in these materials. Here we…

cond-mat.str-el2016★ 3 cited

Modulated magnetism and anomalous electronic transport in

Jiakui K. Wang, Shan Wu, Yiming Qiu +4

The complex magnetism and transport properties of tetragonal CeCuAsO were examined through neutron scattering and physical properties measurements on polycrystallin…

cond-mat.str-el2016★ 8 cited

Unconventional and conventional quantum criticalities in CeRhIrIn

Yongkang Luo, Xin Lu, A. P. Dioguardi +4

An appropriate description of the state of matter that appears as a second order phase transition is tuned toward zero temperature, {\it viz.} quantum-critical point (QCP), poses f…

cond-mat.str-el2016★ 11 cited

Quantum Transitions of Nematic Phases in a Spin- Bilinear-Biquadratic Model and Their Implications for FeSe

Wen-Jun Hu, Hsin-Hua Lai, Shou-Shu Gong +3

Since its discovery, iron-based superconductivity has been known to develop near an antiferromagnetic order, but this paradigm fails in the iron chalcogenide FeSe, whose single-lay…

cond-mat.str-el2016

Large magnetic anisotropy in Fe_{0.25}TaS_2

Vaideesh Loganathan, Jian-Xin Zhu, Andriy H. Nevidomskyy

We present a first-principles study of the large magneto-crystalline anisotropy in the intercalated di-chalcogenide material \ce{Fe_{0.25}TaS_2}, investigated with the DFT+U approa…

cond-mat.str-el2016★ 2 cited

Quantum critical dynamics for a prototype class of insulating antiferromagnets

Jianda Wu, Wang Yang, Congjun Wu +1

Quantum criticality is a fundamental organizing principle for studying strongly correlated systems. Nevertheless, understanding quantum critical dynamics at nonzero temperatures is…

cond-mat.str-el2016★ 19 cited

Tuning of magnetic quantum criticality in artificial Kondo superlattice CeRhIn5/YbRhIn5

T. Ishii, R. Toda, Y. Hanaoka +8

The effects of reduced dimensions and the interfaces on antiferromagnetic quantum criticality are studied in epitaxial Kondo superlattices, with alternating layers of heavy-fer…

cond-mat.str-el2016★ 3 cited

Critical local moment fluctuations and enhanced pairing correlations in a cluster Anderson model

Ang Cai, J. H. Pixley, Kevin Ingersent +1

The appearance of unconventional superconductivity near heavy-fermion quantum critical points (QCPs) motivates investigation of pairing correlations close to a ``beyond Landau'' Ko…

cond-mat.str-el2016★ 48 cited

Resistivity Minimum in Highly Frustrated Itinerant Magnets

Zhentao Wang, Kipton Barros, Gia-Wei Chern +2

We study the transport properties of frustrated itinerant magnets comprising localized {\it classical} moments, which interact via exchange with the conduction electrons. Strong fr…

cond-mat.str-el2016★ 64 cited

Variational Monte Carlo study of chiral spin liquid in quantum antiferromagnet on the triangular lattice

Wen-Jun Hu, Shou-Shu Gong, D. N. Sheng

By using Gutzwiller projected fermionic wave functions and variational Monte Carlo technique, we study the spin- Heisenberg model with the first-neighbor (), second-neigh…

cond-mat.str-el2016★ 20 cited

Antiferroquadrupolar order and rotational symmetry breaking in a generalized bilinear-biquadratic model on a square lattice

Hsin-Hua Lai, Wen-Jun Hu, Emilian M. Nica +2

The magnetic and nematic properties of the iron chalcogenides have recently been the subject of intense interest. Motivated by the proposed antiferroquadrupolar and Ising-nematic o…

cond-mat.str-el2016★ 33 cited

Spin Ferroquadrupolar Order in the Nematic Phase of FeSe

Zhentao Wang, Wen-Jun Hu, Andriy H. Nevidomskyy

We provide evidence that spin ferroquadrupolar (FQ) order is the likely ground state in the nonmagnetic nematic phase of stoichiometric FeSe. By studying the variational mean-field…

cond-mat.str-el2016★ 293 cited

Spin liquid nature in the Heisenberg - triangular antiferromagnet

Yasir Iqbal, Wen-Jun Hu, Ronny Thomale +2

We investigate the spin- Heisenberg model on the triangular lattice in the presence of nearest-neighbor and next-nearest-neighbor antiferromagnetic couplin…